Re: BUG: unable to handle page fault for address: 0000000000030368

[Paul Menzel]

Dear Marco, dear Linux folks,


Am 26.03.24 um 13:44 schrieb Paul Menzel:
> [Cc: +X86 maintainers]

> Thank you for your quick reply. (Note, that your mailer wrapped the 
> pasted lines.)
>
> Am 26.03.24 um 11:07 schrieb Marco Elver:
> > On Tue, 26 Mar 2024 at 10:23, Paul Menzel wrote:
>
> > > Trying KCSAN the first time – configuration attached –, it fails to boot
> > > on the Dell XPS 13 9360 and QEMU q35. I couldn’t get logs on the Dell
> > > XPS 13 9360, so here are the QEMU ones:
> >
> > If there's a bad access somewhere which is instrumented by KCSAN, it
> > will unfortunately still crash inside KCSAN.
> >
> > What happens if you compile with CONFIG_KCSAN_EARLY_ENABLE=n? It
> > disables KCSAN (but otherwise the kernel image is the same) and
> > requires turning it on manually with "echo on >
> > /sys/kernel/debug/kcsan" after boot.
> >
> > If it still crashes, then there's definitely a bug elsewhere. If it
> > doesn't crash, and only crashes with KCSAN enabled, my guess is that
> > KCSAN's delays of individual threads are perturbing execution to
> > trigger previously undetected bugs.
>
> Such a Linux kernel booted with a warning on the Dell XPS 13 9360 (but 
> booted with *no* warning on QEMU q35) [1], but enabling KCSAN on the 
> laptop hangs the laptop right away. I couldn’t get any logs of the laptop.

In the QEMU q35 virtual machine `echo on | sudo tee 
/sys/kernel/debug/kcsan` also locks up the system. Please find the logs 
attached.

    [   78.241245] BUG: unable to handle page fault for address: 
0000000000019a18
    [   78.242815] #PF: supervisor read access in kernel mode
    [   78.244001] #PF: error_code(0x0000) - not-present page
    [   78.245186] PGD 0 P4D 0
    [   78.245828] Oops: 0000 [#1] PREEMPT SMP NOPTI
    [   78.246878] CPU: 4 PID: 783 Comm: sudo Not tainted 6.9.0-rc1+ #83
    [   78.248289] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), 
BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
    [   78.250763] RIP: 0010:kcsan_setup_watchpoint+0x2b3/0x400
    [   78.252108] Code: ea 00 f0 48 ff 05 25 b4 8f 02 eb e0 65 48 8b 
05 7b 53 23 4f 48 8d 98 c0 02 03 00 e9 9f fd ff ff 48 83 fd 08 0f 85 fd 
00 00 00 <4d> 8b 04 24 e9 bf fe ff ff 49 85 d1 75 54 ba 01 00 00 00 4a 84
    [   78.256284] RSP: 0018:ffffbae1c0f5bc48 EFLAGS: 00010046
    [   78.257548] RAX: 0000000000000000 RBX: ffff9b95c4ba93b0 RCX: 
0000000000000019
    [   78.259158] RDX: 0000000000000001 RSI: ffffffffb0f82d36 RDI: 
0000000000000000
    [   78.260781] RBP: 0000000000000008 R08: 00000000aaaaaaab R09: 
0000000000000000
    [   78.262417] R10: 0000000000000086 R11: 0010000000019a18 R12: 
0000000000019a18
    [   78.264040] R13: 000000000000001a R14: 0000000000000000 R15: 
0000000000000000
    [   78.265658] FS:  00007f65e3a91f00(0000) 
GS:ffff9b9d1f000000(0000) knlGS:0000000000000000
    [   78.267480] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [   78.268804] CR2: 0000000000019a18 CR3: 0000000102e26000 CR4: 
00000000003506f0
    [   78.270424] Call Trace:
    [   78.271036]  <TASK>
    [   78.271572]  ? __die+0x23/0x70
    [   78.272344]  ? page_fault_oops+0x173/0x4f0
    [   78.273400]  ? exc_page_fault+0x81/0x190
    [   78.274373]  ? asm_exc_page_fault+0x26/0x30
    [   78.275395]  ? refill_obj_stock+0x36/0x2e0
    [   78.276410]  ? kcsan_setup_watchpoint+0x2b3/0x400
    [   78.277556]  refill_obj_stock+0x36/0x2e0
    [   78.278540]  obj_cgroup_uncharge+0x13/0x20
    [   78.279596]  __memcg_slab_free_hook+0xac/0x140
    [   78.280661]  ? free_pipe_info+0x135/0x150
    [   78.281631]  kfree+0x2de/0x310
    [   78.282419]  free_pipe_info+0x135/0x150
    [   78.283395]  pipe_release+0x188/0x1a0
    [   78.284303]  __fput+0x127/0x4e0
    [   78.285114]  __fput_sync+0x35/0x40
    [   78.285958]  __x64_sys_close+0x54/0xa0
    [   78.286914]  do_syscall_64+0x88/0x1a0
    [   78.287810]  ? fpregs_assert_state_consistent+0x7e/0x90
    [   78.289185]  ? srso_return_thunk+0x5/0x5f
    [   78.290203]  ? arch_exit_to_user_mode_prepare.isra.0+0x69/0xa0
    [   78.291568]  ? srso_return_thunk+0x5/0x5f
    [   78.292518]  ? syscall_exit_to_user_mode+0x40/0xe0
    [   78.293651]  ? srso_return_thunk+0x5/0x5f
    [   78.294606]  ? do_syscall_64+0x94/0x1a0
    [   78.295516]  ? arch_exit_to_user_mode_prepare.isra.0+0x69/0xa0
    [   78.296876]  ? srso_return_thunk+0x5/0x5f

Can you reproduce this?

> > At least I can't explain it any other way.
>
> How do you test KCSAN?


Kind regards,

Paul


> > > ```
> > > $ qemu-system-x86_64 -M q35 -enable-kvm -smp cpus=2 -m 1G -serial 
> > > stdio -net nic -net user,hostfwd=tcp::22222-:22 -kernel 
> > > boot/vmlinuz-6.9.0-rc1+ -append "root=/dev/sda1 console=ttyS0"
> > > [    0.000000] Linux version 6.9.0-rc1+ (build@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx) (gcc (Debian 13.2.0-19) 13.2.0, GNU ld (GNU Binutils for Debian) 2.42) #75 SMP PREEMPT_DYNAMIC Tue Mar 26 07:03:41 CET 2024
> > > [    0.000000] Command line: root=/dev/sda1 console=ttyS0
> > > [    0.000000] BIOS-provided physical RAM map:
> > > [    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
> > > [    0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
> > > [    0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
> > > [    0.000000] BIOS-e820: [mem 0x0000000000100000-0x000000003ffdefff] usable
> > > [    0.000000] BIOS-e820: [mem 0x000000003ffdf000-0x000000003fffffff] reserved
> > > [    0.000000] BIOS-e820: [mem 0x00000000b0000000-0x00000000bfffffff] reserved
> > > [    0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved
> > > [    0.000000] BIOS-e820: [mem 0x00000000feffc000-0x00000000feffffff] reserved
> > > [    0.000000] BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
> > > [    0.000000] NX (Execute Disable) protection: active
> > > [    0.000000] APIC: Static calls initialized
> > > [    0.000000] SMBIOS 3.0.0 present.
> > > [    0.000000] DMI: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
> > > [    0.000000] Hypervisor detected: KVM
> > > [    0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00
> > > [    0.000001] kvm-clock: using sched offset of 1376980956 cycles
> > > [    0.000006] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
> > > [    0.000014] tsc: Detected 2904.008 MHz processor
> > > [    0.004273] last_pfn = 0x3ffdf max_arch_pfn = 0x400000000
> > > [    0.004315] MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs
> > > [    0.004323] x86/PAT: Configuration [0-7]: WB  WC  UC- UC  WB  WPUC- WT
> > > [    0.012972] found SMP MP-table at [mem 0x000f5480-0x000f548f]
> > > [    0.013243] ACPI: Early table checksum verification disabled
> > > [    0.013252] ACPI: RSDP 0x00000000000F52C0 000014 (v00 BOCHS )
> > > [    0.013265] ACPI: RSDT 0x000000003FFE2357 000038 (v01 BOCHS  BXPC 00000001 BXPC 00000001)
> > > [    0.013283] ACPI: FACP 0x000000003FFE2147 0000F4 (v03 BOCHS  BXPC 00000001 BXPC 00000001)
> > > [    0.013304] ACPI: DSDT 0x000000003FFE0040 002107 (v01 BOCHS  BXPC 00000001 BXPC 00000001)
> > > [    0.013319] ACPI: FACS 0x000000003FFE0000 000040
> > > [    0.013331] ACPI: APIC 0x000000003FFE223B 000080 (v03 BOCHS  BXPC 00000001 BXPC 00000001)
> > > [    0.013346] ACPI: HPET 0x000000003FFE22BB 000038 (v01 BOCHS  BXPC 00000001 BXPC 00000001)
> > > [    0.013361] ACPI: MCFG 0x000000003FFE22F3 00003C (v01 BOCHS  BXPC 00000001 BXPC 00000001)
> > > [    0.013375] ACPI: WAET 0x000000003FFE232F 000028 (v01 BOCHS  BXPC 00000001 BXPC 00000001)
> > > [    0.013388] ACPI: Reserving FACP table memory at [mem 0x3ffe2147-0x3ffe223a]
> > > [    0.013393] ACPI: Reserving DSDT table memory at [mem 0x3ffe0040-0x3ffe2146]
> > > [    0.013398] ACPI: Reserving FACS table memory at [mem 0x3ffe0000-0x3ffe003f]
> > > [    0.013402] ACPI: Reserving APIC table memory at [mem 0x3ffe223b-0x3ffe22ba]
> > > [    0.013407] ACPI: Reserving HPET table memory at [mem 0x3ffe22bb-0x3ffe22f2]
> > > [    0.013411] ACPI: Reserving MCFG table memory at [mem 0x3ffe22f3-0x3ffe232e]
> > > [    0.013416] ACPI: Reserving WAET table memory at [mem 0x3ffe232f-0x3ffe2356]
> > > [    0.013746] No NUMA configuration found
> > > [    0.013750] Faking a node at [mem 0x0000000000000000-0x000000003ffdefff]
> > > [    0.013762] NODE_DATA(0) allocated [mem 0x3ffb4000-0x3ffdefff]
> > > [    0.015042] Zone ranges:
> > > [    0.015047]   DMA      [mem 0x0000000000001000-0x0000000000ffffff]
> > > [    0.015056]   DMA32    [mem 0x0000000001000000-0x000000003ffdefff]
> > > [    0.015067]   Normal   empty
> > > [    0.015073]   Device   empty
> > > [    0.015080] Movable zone start for each node
> > > [    0.015113] Early memory node ranges
> > > [    0.015116]   node   0: [mem 0x0000000000001000-0x000000000009efff]
> > > [    0.015122]   node   0: [mem 0x0000000000100000-0x000000003ffdefff]
> > > [    0.015128] Initmem setup node 0 [mem 0x0000000000001000-0x000000003ffdefff]
> > > [    0.015177] On node 0, zone DMA: 1 pages in unavailable ranges
> > > [    0.015913] On node 0, zone DMA: 97 pages in unavailable ranges
> > > [    0.028914] On node 0, zone DMA32: 33 pages in unavailable ranges
> > > [    0.029456] ACPI: PM-Timer IO Port: 0x608
> > > [    0.029493] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
> > > [    0.029547] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
> > > [    0.029558] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
> > > [    0.029564] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
> > > [    0.029569] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
> > > [    0.029575] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
> > > [    0.029580] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
> > > [    0.029597] ACPI: Using ACPI (MADT) for SMP configuration information
> > > [    0.029602] ACPI: HPET id: 0x8086a201 base: 0xfed00000
> > > [    0.029624] CPU topo: Max. logical packages:   1
> > > [    0.029628] CPU topo: Max. logical dies:       1
> > > [    0.029631] CPU topo: Max. dies per package:   1
> > > [    0.029644] CPU topo: Max. threads per core:   1
> > > [    0.029647] CPU topo: Num. cores per package:     2
> > > [    0.029650] CPU topo: Num. threads per package:   2
> > > [    0.029653] CPU topo: Allowing 2 present CPUs plus 0 hotplug CPUs
> > > [    0.029679] kvm-guest: APIC: eoi() replaced with kvm_guest_apic_eoi_write()
> > > [    0.029726] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
> > > [    0.029734] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x0009ffff]
> > > [    0.029738] PM: hibernation: Registered nosave memory: [mem 0x000a0000-0x000effff]
> > > [    0.029742] PM: hibernation: Registered nosave memory: [mem 0x000f0000-0x000fffff]
> > > [    0.029749] [mem 0x40000000-0xafffffff] available for PCI devices
> > > [    0.029753] Booting paravirtualized kernel on KVM
> > > [    0.029758] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns
> > > [    0.035898] setup_percpu: NR_CPUS:8192 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:1
> > > [    0.036314] percpu: Embedded 65 pages/cpu s229376 r8192 d28672 u1048576
> > > [    0.036436] kvm-guest: PV spinlocks disabled, no host support
> > > [    0.036440] Kernel command line: root=/dev/sda1 console=ttyS0
> > > [    0.036669] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes, linear)
> > > [    0.036739] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes, linear)
> > > [    0.036830] Fallback order for Node 0: 0
> > > [    0.036839] Built 1 zonelists, mobility grouping on.  Total pages: 257759
> > > [    0.036844] Policy zone: DMA32
> > > [    0.036875] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
> > > [    0.042521] Memory: 260860K/1048052K available (22528K kernel code, 2386K rwdata, 6124K rodata, 6304K init, 8064K bss, 70584K reserved, 0K cma-reserved)
> > > [    0.056267] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
> > > [    0.056279] kmemleak: Kernel memory leak detector disabled
> > > [    0.056484] Kernel/User page tables isolation: enabled
> > > [    0.056631] ftrace: allocating 43400 entries in 170 pages
> > > [    0.065090] ftrace: allocated 170 pages with 4 groups
> > > [    0.066107] Dynamic Preempt: voluntary
> > > [    0.066496] rcu: Preemptible hierarchical RCU implementation.
> > > [    0.066500] rcu:     RCU restricting CPUs from NR_CPUS=8192 to nr_cpu_ids=2.
> > > [    0.066505]  Trampoline variant of Tasks RCU enabled.
> > > [    0.066508]  Rude variant of Tasks RCU enabled.
> > > [    0.066510]  Tracing variant of Tasks RCU enabled.
> > > [    0.066513] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
> > > [    0.066517] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
> > > [    0.066535] RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1.
> > > [    0.066541] RCU Tasks Rude: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1.
> > > [    0.066546] RCU Tasks Trace: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1.
> > > [    0.079398] NR_IRQS: 524544, nr_irqs: 440, preallocated irqs: 16
> > > [    0.079764] rcu: srcu_init: Setting srcu_struct sizes based on contention.
> > > [    0.091718] Console: colour VGA+ 80x25
> > > [    0.091774] printk: legacy console [ttyS0] enabled
> > > [    0.232004] ACPI: Core revision 20230628
> > > [    0.233211] clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns
> > > [    0.234715] APIC: Switch to symmetric I/O mode setup
> > > [    0.235721] x2apic enabled
> > > [    0.236578] APIC: Switched APIC routing to: physical x2apic
> > > [    0.239656] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
> > > [    0.241221] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x29dc0d988f1, max_idle_ns: 440795328788 ns
> > > [    0.243872] Calibrating delay loop (skipped) preset value.. 5808.01 BogoMIPS (lpj=11616032)
> > > [    0.246030] Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
> > > [    0.247870] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0
> > > [    0.248788] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
> > > [    0.250127] Spectre V2 : Mitigation: Retpolines
> > > [    0.251176] Spectre V2 : Spectre v2 / SpectreRSB mitigation: Filling RSB on context switch
> > > [    0.251868] Spectre V2 : Spectre v2 / SpectreRSB : Filling RSB on VMEXIT
> > > [    0.253483] Speculative Store Bypass: Vulnerable
> > > [    0.255878] MDS: Vulnerable: Clear CPU buffers attempted, no microcode
> > > [    0.257191] MMIO Stale Data: Unknown: No mitigations
> > > [    0.258243] x86/fpu: x87 FPU will use FXSAVE
> > > [    0.327550] Freeing SMP alternatives memory: 36K
> > > [    0.327884] pid_max: default: 32768 minimum: 301
> > > [    0.330232] LSM: initializing lsm=capability,landlock,apparmor,tomoyo,bpf,ima,evm
> > > [    0.332326] landlock: Up and running.
> > > [    0.333534] AppArmor: AppArmor initialized
> > > [    0.334523] TOMOYO Linux initialized
> > > [    0.335895] LSM support for eBPF active
> > > [    0.337311] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes, linear)
> > > [    0.339886] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes, linear)
> > > [    0.344459] kcsan: enabled early
> > > [    0.345245] kcsan: non-strict mode configured - use CONFIG_KCSAN_STRICT=y to see all data races
> > > [    0.375873] BUG: unable to handle page fault for address: 0000000000030368
> > > [    0.377316] #PF: supervisor read access in kernel mode
> > > [    0.378506] #PF: error_code(0x0000) - not-present page
> > > [    0.379647] PGD 0 P4D 0
> > > [    0.379861] Oops: 0000 [#1] PREEMPT SMP PTI
> > > [    0.379861] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.9.0-rc1+ #75
> > > [    0.379861] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
> > > [    0.379861] RIP: 0010:kcsan_setup_watchpoint+0x3cc/0x400
> > > [    0.379861] Code: 8b 04 24 4c 89 c2 48 31 c2 e9 69 fe ff ff 45 31 c0 e9 c3 fd ff ff 4c 89 c2 31 c0 e9 57 fe ff ff 45 0f b6 04 24 e9 af fd ff ff <45> 8b 04 24 e9 a6 fd ff ff 85 c9 74 08 f0 48 ff 05 b7 a2 6e 02 b9
> > > [    0.379861] RSP: 0000:ffff9fed80003de0 EFLAGS: 00010046
> > > [    0.379861] RAX: 0000000000000000 RBX: ffff8c2d3ec302c0 RCX: 0000000000000030
> > > [    0.379861] RDX: 0000000000000001 RSI: ffffffff995ff0f0 RDI: 0000000000000000
> > > [    0.379861] RBP: 0000000000000004 R08: 00000000aaaaaaab R09: 0000000000000000
> > > [    0.379861] R10: 0000000000030368 R11: 0008000000030368 R12: 0000000000030368
> > > [    0.379861] R13: 0000000000000031 R14: 0000000000000000 R15: 0000000000000000
> > > [    0.379861] FS:  0000000000000000(0000) GS:ffff8c2d3ec00000(0000) knlGS:0000000000000000
> > > [    0.379861] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > > [    0.379861] CR2: 0000000000030368 CR3: 0000000030a20000 CR4: 00000000000006f0
> > > [    0.379861] Call Trace:
> > > [    0.379861]  <IRQ>
> > > [    0.379861]  ? __die+0x23/0x70
> > > [    0.379861]  ? page_fault_oops+0x173/0x4f0
> > > [    0.379861]  ? exc_page_fault+0x81/0x190
> > > [    0.379861]  ? asm_exc_page_fault+0x26/0x30
> > > [    0.379861]  ? perf_event_task_tick+0x40/0x130
> > > [    0.379861]  ? kcsan_setup_watchpoint+0x3cc/0x400
> > > [    0.379861]  ? update_load_avg+0x7e/0x7e0
> > > [    0.379861]  ? __hrtimer_run_queues+0x3e/0x4b0
> > > [    0.379861]  ? hrtimer_active+0x88/0xc0
> > > [    0.379861]  perf_event_task_tick+0x40/0x130
> > > [    0.379861]  scheduler_tick+0xe3/0x2a0
> > > [    0.379861]  update_process_times+0xb4/0xe0
> > > [    0.379861]  tick_periodic+0x4e/0x110
> > > [    0.379861]  tick_handle_periodic+0x39/0x90
> > > [    0.379861]  ? __pfx_timer_interrupt+0x10/0x10
> > > [    0.379861]  timer_interrupt+0x18/0x30
> > > [    0.379861]  __handle_irq_event_percpu+0x7b/0x280
> > > [    0.379861]  handle_irq_event+0x78/0xf0
> > > [    0.379861]  handle_edge_irq+0x11e/0x400
> > > [    0.379861]  __common_interrupt+0x3f/0xa0
> > > [    0.379861]  common_interrupt+0x80/0xa0
> > > [    0.379861]  </IRQ>
> > > [    0.379861]  <TASK>
> > > [    0.379861]  asm_common_interrupt+0x26/0x40
> > > [    0.379861] RIP: 0010:__tsan_read4+0x34/0x110
> > > [    0.379861] Code: 4c 8b 1c 24 48 b9 ff ff ff ff ff ff 01 00 48 c1 e8 09 49 21 ca 25 f8 01 00 00 4c 8d 80 60 e8 cc 9b 48 05 78 e8 cc 9b 4d 8b 08 <4d> 85 c9 79 2a 4c 89 ca 4c 89 ce 48 c1 ea 31 48 21 ce 81 e2 ff 3f
> > > [    0.379861] RSP: 0000:ffff9fed80013e18 EFLAGS: 00000296
> > > [    0.379861] RAX: ffffffff9bcce890 RBX: 000000012dbb5ed6 RCX: 0001ffffffffffff
> > > [    0.379861] RDX: 0000000000098472 RSI: ffffffff9b65df00 RDI: ffffffff9b043f64
> > > [    0.379861] RBP: 0000000000b13f20 R08: ffffffff9bcce878 R09: 0000000000000000
> > > [    0.379861] R10: 0001ffff9b043f64 R11: ffffffff9b65df00 R12: 00000000fffedb23
> > > [    0.379861] R13: 0000000000000000 R14: ffff8c2d3ec00000 R15: 00000000002c4fc8
> > > [    0.379861]  ? setup_boot_APIC_clock+0x180/0x8f0
> > > [    0.379861]  ? setup_boot_APIC_clock+0x180/0x8f0
> > > [    0.379861]  setup_boot_APIC_clock+0x180/0x8f0
> > > [    0.379861]  native_smp_prepare_cpus+0x2b/0xc0
> > > [    0.379861]  kernel_init_freeable+0x41e/0x7d0
> > > [    0.379861]  ? __pfx_kernel_init+0x10/0x10
> > > [    0.379861]  kernel_init+0x1f/0x230
> > > [    0.379861]  ret_from_fork+0x34/0x50
> > > [    0.379861]  ? __pfx_kernel_init+0x10/0x10
> > > [    0.379861]  ret_from_fork_asm+0x1a/0x30
> > > [    0.379861]  </TASK>
> > > [    0.379861] Modules linked in:
> > > [    0.379861] CR2: 0000000000030368
> > > [    0.379861] ---[ end trace 0000000000000000 ]---
> > > [    0.379861] RIP: 0010:kcsan_setup_watchpoint+0x3cc/0x400
> > > [    0.379861] Code: 8b 04 24 4c 89 c2 48 31 c2 e9 69 fe ff ff 45 31 c0 e9 c3 fd ff ff 4c 89 c2 31 c0 e9 57 fe ff ff 45 0f b6 04 24 e9 af fd ff ff <45> 8b 04 24 e9 a6 fd ff ff 85 c9 74 08 f0 48 ff 05 b7 a2 6e 02 b9
> > > [    0.379861] RSP: 0000:ffff9fed80003de0 EFLAGS: 00010046
> > > [    0.379861] RAX: 0000000000000000 RBX: ffff8c2d3ec302c0 RCX: 0000000000000030
> > > [    0.379861] RDX: 0000000000000001 RSI: ffffffff995ff0f0 RDI: 0000000000000000
> > > [    0.379861] RBP: 0000000000000004 R08: 00000000aaaaaaab R09: 0000000000000000
> > > [    0.379861] R10: 0000000000030368 R11: 0008000000030368 R12: 0000000000030368
> > > [    0.379861] R13: 0000000000000031 R14: 0000000000000000 R15: 0000000000000000
> > > [    0.379861] FS:  0000000000000000(0000) GS:ffff8c2d3ec00000(0000) knlGS:0000000000000000
> > > [    0.379861] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > > [    0.379861] CR2: 0000000000030368 CR3: 0000000030a20000 CR4: 00000000000006f0
> > > [    0.379861] Kernel panic - not syncing: Fatal exception in interrupt
> > > [    0.379861] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---
> > > ```
[   78.241245] BUG: unable to handle page fault for address: 0000000000019a18
[   78.242815] #PF: supervisor read access in kernel mode
[   78.244001] #PF: error_code(0x0000) - not-present page
[   78.245186] PGD 0 P4D 0
[   78.245828] Oops: 0000 [#1] PREEMPT SMP NOPTI
[   78.246878] CPU: 4 PID: 783 Comm: sudo Not tainted 6.9.0-rc1+ #83
[   78.248289] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[   78.250763] RIP: 0010:kcsan_setup_watchpoint+0x2b3/0x400
[   78.252108] Code: ea 00 f0 48 ff 05 25 b4 8f 02 eb e0 65 48 8b 05 7b 53 23 4f 48 8d 98 c0 02 03 00 e9 9f fd ff ff 48 83 fd 08 0f 85 fd 00 00 00 <4d> 8b 04 24 e9 bf fe ff ff 49 85 d1 75 54 ba 01 00 00 00 4a 84
[   78.256284] RSP: 0018:ffffbae1c0f5bc48 EFLAGS: 00010046
[   78.257548] RAX: 0000000000000000 RBX: ffff9b95c4ba93b0 RCX: 0000000000000019
[   78.259158] RDX: 0000000000000001 RSI: ffffffffb0f82d36 RDI: 0000000000000000
[   78.260781] RBP: 0000000000000008 R08: 00000000aaaaaaab R09: 0000000000000000
[   78.262417] R10: 0000000000000086 R11: 0010000000019a18 R12: 0000000000019a18
[   78.264040] R13: 000000000000001a R14: 0000000000000000 R15: 0000000000000000
[   78.265658] FS:  00007f65e3a91f00(0000) GS:ffff9b9d1f000000(0000) knlGS:0000000000000000
[   78.267480] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   78.268804] CR2: 0000000000019a18 CR3: 0000000102e26000 CR4: 00000000003506f0
[   78.270424] Call Trace:
[   78.271036]  <TASK>
[   78.271572]  ? __die+0x23/0x70
[   78.272344]  ? page_fault_oops+0x173/0x4f0
[   78.273400]  ? exc_page_fault+0x81/0x190
[   78.274373]  ? asm_exc_page_fault+0x26/0x30
[   78.275395]  ? refill_obj_stock+0x36/0x2e0
[   78.276410]  ? kcsan_setup_watchpoint+0x2b3/0x400
[   78.277556]  refill_obj_stock+0x36/0x2e0
[   78.278540]  obj_cgroup_uncharge+0x13/0x20
[   78.279596]  __memcg_slab_free_hook+0xac/0x140
[   78.280661]  ? free_pipe_info+0x135/0x150
[   78.281631]  kfree+0x2de/0x310
[   78.282419]  free_pipe_info+0x135/0x150
[   78.283395]  pipe_release+0x188/0x1a0
[   78.284303]  __fput+0x127/0x4e0
[   78.285114]  __fput_sync+0x35/0x40
[   78.285958]  __x64_sys_close+0x54/0xa0
[   78.286914]  do_syscall_64+0x88/0x1a0
[   78.287810]  ? fpregs_assert_state_consistent+0x7e/0x90
[   78.289185]  ? srso_return_thunk+0x5/0x5f
[   78.290203]  ? arch_exit_to_user_mode_prepare.isra.0+0x69/0xa0
[   78.291568]  ? srso_return_thunk+0x5/0x5f
[   78.292518]  ? syscall_exit_to_user_mode+0x40/0xe0
[   78.293651]  ? srso_return_thunk+0x5/0x5f
[   78.294606]  ? do_syscall_64+0x94/0x1a0
[   78.295516]  ? arch_exit_to_user_mode_prepare.isra.0+0x69/0xa0
[   78.296876]  ? srso_return_thunk+0x5/0x5f
[   78.297815] BUG: unable to handle page fault for address: 0000000000019a18
[   78.299325] #PF: supervisor read access in kernel mode
[   78.300527] #PF: error_code(0x0000) - not-present page
[   78.301674] PGD 0 P4D 0
[   78.302381] Oops: 0000 [#2] PREEMPT SMP NOPTI
[   78.303389] CPU: 4 PID: 783 Comm: sudo Not tainted 6.9.0-rc1+ #83
[   78.304743] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[   78.307177] RIP: 0010:kcsan_setup_watchpoint+0x2b3/0x400
[   78.308457] Code: ea 00 f0 48 ff 05 25 b4 8f 02 eb e0 65 48 8b 05 7b 53 23 4f 48 8d 98 c0 02 03 00 e9 9f fd ff ff 48 83 fd 08 0f 85 fd 00 00 00 <4d> 8b 04 24 e9 bf fe ff ff 49 85 d1 75 54 ba 01 00 00 00 4a 84
[   78.311886] RSP: 0018:ffffbae1c0f5b788 EFLAGS: 00010046
[   78.312542] RAX: 0000000000000000 RBX: ffff9b95c4ba93b0 RCX: 0000000000000019
[   78.313310] RDX: 0000000000000003 RSI: ffffffffb0bb1b8b RDI: 0000000000000000
[   78.314081] RBP: 0000000000000008 R08: 00000000aaaaaaab R09: 0000000000000000
[   78.314846] R10: 0000000000000086 R11: 0010000000019a18 R12: 0000000000019a18
[   78.315582] R13: 0000000000000019 R14: 0000000000000000 R15: 0000000000000000
[   78.316372] FS:  00007f65e3a91f00(0000) GS:ffff9b9d1f000000(0000) knlGS:0000000000000000
[   78.317404] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   78.318110] CR2: 0000000000019a18 CR3: 0000000102e26000 CR4: 00000000003506f0
[   78.319006] Call Trace:
[   78.319297]  <TASK>
[   78.319592]  ? __die+0x23/0x70
[   78.320003]  ? page_fault_oops+0x173/0x4f0
[   78.320458]  ? srso_return_thunk+0x5/0x5f
[   78.320890]  ? prb_first_seq+0x7c/0xb0
[   78.321357]  ? exc_page_fault+0x81/0x190
[   78.321736]  ? asm_exc_page_fault+0x26/0x30
[   78.322144]  ? vprintk_store+0x17b/0x750
[   78.322574]  ? kcsan_setup_watchpoint+0x2b3/0x400
[   78.323019]  ? srso_return_thunk+0x5/0x5f
[   78.323400]  ? prb_first_seq+0x7c/0xb0
[   78.323760]  vprintk_store+0x17b/0x750
[   78.324193]  ? srso_return_thunk+0x5/0x5f
[   78.324652]  vprintk_emit.part.0+0x136/0x330
[   78.325080]  ? irqentry_exit_to_user_mode+0x36/0xd0
[   78.325546]  ? irqentry_exit_to_user_mode+0x36/0xd0
[   78.326021]  vprintk_default+0x44/0x60
[   78.326406]  vprintk+0x5e/0x70
[   78.326701]  _printk+0x64/0x80
[   78.327140]  ? srso_return_thunk+0x5/0x5f
[   78.327531]  ? irqentry_exit_to_user_mode+0x36/0xd0
[   78.327992]  show_trace_log_lvl+0x1b9/0x470
[   78.328407]  ? entry_SYSCALL_64_after_hwframe+0x6c/0x74
[   78.328937]  __die+0x23/0x70
[   78.329227]  page_fault_oops+0x173/0x4f0
[   78.329610]  exc_page_fault+0x81/0x190
[   78.329995]  asm_exc_page_fault+0x26/0x30
[   78.330368] RIP: 0010:kcsan_setup_watchpoint+0x2b3/0x400
[   78.330819] Code: ea 00 f0 48 ff 05 25 b4 8f 02 eb e0 65 48 8b 05 7b 53 23 4f 48 8d 98 c0 02 03 00 e9 9f fd ff ff 48 83 fd 08 0f 85 fd 00 00 00 <4d> 8b 04 24 e9 bf fe ff ff 49 85 d1 75 54 ba 01 00 00 00 4a 84
[   78.332436] RSP: 0018:ffffbae1c0f5bc48 EFLAGS: 00010046
[   78.332871] RAX: 0000000000000000 RBX: ffff9b95c4ba93b0 RCX: 0000000000000019
[   78.333462] RDX: 0000000000000001 RSI: ffffffffb0f82d36 RDI: 0000000000000000
[   78.334045] RBP: 0000000000000008 R08: 00000000aaaaaaab R09: 0000000000000000
[   78.334631] R10: 0000000000000086 R11: 0010000000019a18 R12: 0000000000019a18
[   78.335263] R13: 000000000000001a R14: 0000000000000000 R15: 0000000000000000
[   78.335938]  ? refill_obj_stock+0x36/0x2e0
[   78.336311]  refill_obj_stock+0x36/0x2e0
[   78.336741]  obj_cgroup_uncharge+0x13/0x20
[   78.337101]  __memcg_slab_free_hook+0xac/0x140
[   78.337500]  ? free_pipe_info+0x135/0x150
[   78.337846]  kfree+0x2de/0x310
[   78.338213]  free_pipe_info+0x135/0x150
[   78.338554]  pipe_release+0x188/0x1a0
[   78.338919]  __fput+0x127/0x4e0
[   78.339217]  __fput_sync+0x35/0x40
[   78.339644]  __x64_sys_close+0x54/0xa0
[   78.340108]  do_syscall_64+0x88/0x1a0
[   78.340532]  ? fpregs_assert_state_consistent+0x7e/0x90
[   78.341176]  ? srso_return_thunk+0x5/0x5f
[   78.341559]  ? arch_exit_to_user_mode_prepare.isra.0+0x69/0xa0
[   78.342098]  ? srso_return_thunk+0x5/0x5f
[   78.342481]  ? syscall_exit_to_user_mode+0x40/0xe0
[   78.342994]  ? srso_return_thunk+0x5/0x5f
[   78.343432]  ? do_syscall_64+0x94/0x1a0
[   78.343803]  ? arch_exit_to_user_mode_prepare.isra.0+0x69/0xa0
[   78.344376]  ? srso_return_thunk+0x5/0x5f
[   78.344726]  ? irqentry_exit_to_user_mode+0x36/0xd0
[   78.345154]  entry_SYSCALL_64_after_hwframe+0x6c/0x74
[   78.345599] RIP: 0033:0x7f65e3c30240
[   78.345909] Code: 0d 00 00 00 eb b2 e8 1f 02 02 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 80 3d a1 33 0e 00 00 74 17 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 8c
[   78.347393] RSP: 002b:00007ffc8ae74e18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[   78.348083] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f65e3c30240
[   78.348664] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c
[   78.349327] RBP: 0000563ac0e0c060 R08: 000000000000001d R09: 00007ffc8ae74d00
[   78.349906] R10: 00007f65e3a91da0 R11: 0000000000000202 R12: 0000563ac0e0c060
[   78.350499] R13: 0000000000000208 R14: 00007f65e3d33045 R15: 00007ffc8ae75220
[   78.351132]  </TASK>
[   78.351336] Modules linked in: cfg80211 intel_rapl_msr intel_rapl_common crc32_pclmul ghash_clmulni_intel sha512_ssse3 sha512_generic sha256_ssse3 sha1_ssse3 rfkill ppdev aesni_intel parport_pc evdev crypto_s
[   78.355550] CR2: 0000000000019a18
[   78.355834] ---[ end trace 0000000000000000 ]---
[   78.356229] RIP: 0010:kcsan_setup_watchpoint+0x2b3/0x400
[   78.356678] Code: ea 00 f0 48 ff 05 25 b4 8f 02 eb e0 65 48 8b 05 7b 53 23 4f 48 8d 98 c0 02 03 00 e9 9f fd ff ff 48 83 fd 08 0f 85 fd 00 00 00 <4d> 8b 04 24 e9 bf fe ff ff 49 85 d1 75 54 ba 01 00 00 00 4a 84
[   78.358342] RSP: 0018:ffffbae1c0f5bc48 EFLAGS: 00010046
[   78.358797] RAX: 0000000000000000 RBX: ffff9b95c4ba93b0 RCX: 0000000000000019
[   78.359545] RDX: 0000000000000001 RSI: ffffffffb0f82d36 RDI: 0000000000000000
[   78.360261] RBP: 0000000000000008 R08: 00000000aaaaaaab R09: 0000000000000000
[   78.360901] R10: 0000000000000086 R11: 0010000000019a18 R12: 0000000000019a18
[   78.361559] R13: 000000000000001a R14: 0000000000000000 R15: 0000000000000000
[   78.362265] FS:  00007f65e3a91f00(0000) GS:ffff9b9d1f000000(0000) knlGS:0000000000000000
[   78.363168] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   78.363676] CR2: 0000000000019a18 CR3: 0000000102e26000 CR4: 00000000003506f0
[   78.364309] note: sudo[783] exited with irqs disabled
[  100.479297] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[  100.480692] rcu:     4-...!: (0 ticks this GP) idle=de5c/1/0x4000000000000000 softirq=553/553 fqs=69
[  100.482596] rcu:     (detected by 14, t=5561 jiffies, g=1513, q=53 ncpus=32)
[  100.484032] Sending NMI from CPU 14 to CPUs 4:
[  100.485030] NMI backtrace for cpu 4
[  100.485048] CPU: 4 PID: 783 Comm: sudo Tainted: G      D            6.9.0-rc1+ #83
[  100.485067] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[  100.485081] RIP: 0010:__kcsan_check_access+0x58/0x180
[  100.485115] Code: ff ff ff 01 00 48 c1 e8 09 41 83 e5 01 25 f8 01 00 00 48 21 dd 4c 8d 80 60 f8 6d b3 4c 8d 64 3d ff 48 05 78 f8 6d b3 4d 8b 08 <49> 83 f9 01 76 30 4c 89 ca 4c 89 c9 48 c1 ea 31 48 21 d9 81 ef
[  100.485131] RSP: 0018:ffffbae1c0f5b800 EFLAGS: 00000096
[  100.485146] RAX: ffffffffb36dfa50 RBX: 0001ffffffffffff RCX: 0001ffffffffffff
[  100.485157] RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000000000004
[  100.485168] RBP: 0001ffffb363b80c R08: ffffffffb36dfa38 R09: 0000000000000000
[  100.485179] R10: ffffffffb363b80c R11: ffffffffb1c8b871 R12: 0001ffffb363b80f
[  100.485194] R13: 0000000000000000 R14: ffff9b9d1f0363c8 R15: 0000000000000004
[  100.485207] FS:  00007f65e3a91f00(0000) GS:ffff9b9d1f000000(0000) knlGS:0000000000000000
[  100.485221] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  100.485233] CR2: 000000000003478c CR3: 0000000102e26000 CR4: 00000000003506f0
[  100.485245] Call Trace:
[  100.485253]  <NMI>
[  100.485274]  ? nmi_cpu_backtrace+0xee/0x190
[  100.485311]  ? nmi_cpu_backtrace_handler+0x11/0x20
[  100.485332]  ? nmi_handle+0x61/0x150
[  100.485357]  ? default_do_nmi+0x42/0x100
[  100.485389]  ? exc_nmi+0x122/0x1a0
[  100.485408]  ? end_repeat_nmi+0xf/0x53
[  100.485435]  ? __pv_queued_spin_lock_slowpath+0x111/0x660
[  100.485470]  ? __kcsan_check_access+0x58/0x180
[  100.485491]  ? __kcsan_check_access+0x58/0x180
[  100.485513]  ? __kcsan_check_access+0x58/0x180
[  100.485555]  </NMI>
[  100.485561]  <TASK>
[  100.485570]  __pv_queued_spin_lock_slowpath+0x111/0x660
[  100.485598]  ? srso_return_thunk+0x5/0x5f
[  100.485620]  oops_begin+0x8c/0x90
[  100.485638]  page_fault_oops+0x62/0x4f0
[  100.485676]  ? srso_return_thunk+0x5/0x5f
[  100.485704]  ? get_page_from_freelist+0x1274/0x1400
[  100.485736]  exc_page_fault+0x81/0x190
[  100.485778]  asm_exc_page_fault+0x26/0x30
[  100.485795] RIP: 0010:kcsan_setup_watchpoint+0x3cc/0x400
[  100.485814] Code: 8b 04 24 4c 89 c2 48 31 c2 e9 69 fe ff ff 45 31 c0 e9 c3 fd ff ff 4c 89 c2 31 c0 e9 57 fe ff ff 45 0f b6 04 24 e9 af fd ff ff <45> 8b 04 24 e9 a6 fd ff ff 85 c9 74 08 f0 48 ff 05 b7 b2 8f 09
[  100.485829] RSP: 0018:ffffbae1c0f5b9f0 EFLAGS: 00010046
[  100.485843] RAX: 0000000000000000 RBX: ffff9b95c4ba93b0 RCX: 0000000000000034
[  100.485854] RDX: 0000000000000001 RSI: ffffffffb0f81714 RDI: 0000000000000000
[  100.485864] RBP: 0000000000000004 R08: 00000000aaaaaaab R09: 0000000000000000
[  100.485875] R10: 0000000000000286 R11: 000800000003478c R12: 000000000003478c
[  100.485886] R13: 0000000000000035 R14: 0000000000000000 R15: 0000000000000000
[  100.485918]  ? __mod_memcg_lruvec_state+0x214/0x220
[  100.485954]  __mod_memcg_lruvec_state+0x214/0x220
[  100.485980]  __mod_lruvec_state+0x41/0x50
[  100.486021]  __lruvec_stat_mod_folio+0xb9/0x110
[  100.486046]  folio_remove_rmap_ptes+0xaa/0x160
[  100.486081]  unmap_page_range+0x128c/0x2240
[  100.486138]  unmap_single_vma+0xbe/0x130
[  100.486174]  unmap_vmas+0x16b/0x2d0
[  100.486208]  exit_mmap+0x141/0x530
[  100.486260]  __mmput+0x86/0x1d0
[  100.486306]  mmput+0x3f/0x50
[  100.486330]  do_exit+0x4d0/0x12f0
[  100.486371]  make_task_dead+0xe0/0x200
[  100.486403]  rewind_stack_and_make_dead+0x16/0x20
[  100.486426] RIP: 0033:0x7f65e3c30240
[  100.486442] Code: Unable to access opcode bytes at 0x7f65e3c30216.
[  100.486452] RSP: 002b:00007ffc8ae74e18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[  100.486477] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f65e3c30240
[  100.486490] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c
[  100.486502] RBP: 0000563ac0e0c060 R08: 000000000000001d R09: 00007ffc8ae74d00
[  100.486516] R10: 00007f65e3a91da0 R11: 0000000000000202 R12: 0000563ac0e0c060
[  100.486528] R13: 0000000000000208 R14: 00007f65e3d33045 R15: 00007ffc8ae75220
[  100.486561]  </TASK>
[  100.486570] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.543 msecs
[  100.487016] rcu: rcu_preempt kthread starved for 5424 jiffies! g1513 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=7
[  100.563364] rcu:     Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
[  100.564286] rcu: RCU grace-period kthread stack dump:
[  100.564857] task:rcu_preempt     state:R  running task     stack:0     pid:16    tgid:16    ppid:2      flags:0x00004000
[  100.566016] Call Trace:
[  100.566308]  <TASK>
[  100.566555]  __schedule+0x3eb/0xab0
[  100.566981]  schedule+0x27/0xf0
[  100.567388]  schedule_timeout+0xe0/0x200
[  100.567889]  ? __pfx_process_timeout+0x10/0x10
[  100.568457]  rcu_gp_fqs_loop+0x1e1/0x850
[  100.568953]  ? __pfx_rcu_gp_kthread+0x10/0x10
[  100.569499]  rcu_gp_kthread+0x190/0x2a0
[  100.569995]  ? __pfx_rcu_gp_kthread+0x10/0x10
[  100.570524]  kthread+0x179/0x1b0
[  100.570917]  ? __pfx_kthread+0x10/0x10
[  100.571387]  ret_from_fork+0x34/0x50
[  100.571812]  ? __pfx_kthread+0x10/0x10
[  100.572265]  ret_from_fork_asm+0x1a/0x30
[  100.572752]  </TASK>
[  100.573017] rcu: Stack dump where RCU GP kthread last ran:
[  100.573643] Sending NMI from CPU 14 to CPUs 7:
[  100.574235] NMI backtrace for cpu 7
[  100.574254] CPU: 7 PID: 0 Comm: swapper/7 Tainted: G      D            6.9.0-rc1+ #83
[  100.574275] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[  100.574288] RIP: 0010:__kcsan_check_access+0x95/0x180
[  100.574322] Code: 81 e2 ff 3f 00 00 4d 85 c9 78 05 45 84 ed 74 13 49 39 cc 72 0e 48 8d 54 11 ff 48 39 ea 0f 83 d0 00 00 00 49 83 c0 08 49 39 c0 <75> be 65 8b 15 1a f6 24 4f f7 c2 00 01 ff 00 74 4c 65 48 8b 0a
[  100.574348] RSP: 0018:ffffbae1c00e3b50 EFLAGS: 00000046
[  100.574362] RAX: ffffffffb36dfa50 RBX: 0001ffffffffffff RCX: 0001ffffffffffff
[  100.574374] RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000000000004
[  100.574384] RBP: 0001ffffb363b80c R08: ffffffffb36dfa50 R09: 0000000000000000
[  100.574395] R10: ffffffffb363b80c R11: ffffffffb1c8b871 R12: 0001ffffb363b80f
[  100.574406] R13: 0000000000000000 R14: ffff9b9d1f1b63c8 R15: 0000000000000007
[  100.574419] FS:  0000000000000000(0000) GS:ffff9b9d1f180000(0000) knlGS:0000000000000000
[  100.574433] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  100.574445] CR2: 0000000000025f30 CR3: 000000056e220000 CR4: 00000000003506f0
[  100.574458] Call Trace:
[  100.574467]  <NMI>
[  100.574492]  ? nmi_cpu_backtrace+0xee/0x190
[  100.574525]  ? nmi_cpu_backtrace_handler+0x11/0x20
[  100.574548]  ? nmi_handle+0x61/0x150
[  100.574574]  ? default_do_nmi+0x42/0x100
[  100.574601]  ? exc_nmi+0x122/0x1a0
[  100.574620]  ? end_repeat_nmi+0xf/0x53
[  100.574649]  ? __pv_queued_spin_lock_slowpath+0x111/0x660
[  100.574684]  ? __kcsan_check_access+0x95/0x180
[  100.574705]  ? __kcsan_check_access+0x95/0x180
[  100.574727]  ? __kcsan_check_access+0x95/0x180
[  100.574761]  </NMI>
[  100.574767]  <TASK>
[  100.574776]  __pv_queued_spin_lock_slowpath+0x111/0x660
[  100.574804]  ? srso_return_thunk+0x5/0x5f
[  100.574825]  oops_begin+0x8c/0x90
[  100.574844]  page_fault_oops+0x62/0x4f0
[  100.574868]  ? srso_return_thunk+0x5/0x5f
[  100.574891]  exc_page_fault+0x81/0x190
[  100.574922]  asm_exc_page_fault+0x26/0x30
[  100.574939] RIP: 0010:kcsan_setup_watchpoint+0x2b3/0x400
[  100.574976] Code: ea 00 f0 48 ff 05 25 b4 8f 02 eb e0 65 48 8b 05 7b 53 23 4f 48 8d 98 c0 02 03 00 e9 9f fd ff ff 48 83 fd 08 0f 85 fd 00 00 00 <4d> 8b 04 24 e9 bf fe ff ff 49 85 d1 75 54 ba 01 00 00 00 4a 84
[  100.574992] RSP: 0018:ffffbae1c00e3d40 EFLAGS: 00010046
[  100.575005] RAX: 0000000000000000 RBX: ffff9b95c08713b0 RCX: 0000000000000025
[  100.575016] RDX: 0000000000000001 RSI: ffffffffb0c40cdf RDI: 0000000000000000
[  100.575026] RBP: 0000000000000008 R08: 00000000aaaaaaab R09: 0000000000000000
[  100.575037] R10: 0000000000000082 R11: 0010000000025f30 R12: 0000000000025f30
[  100.575047] R13: 0000000000000026 R14: 0000000000000000 R15: 0000000000000000
[  100.575068]  ? tick_program_event+0x1f/0xa0
[  100.575117]  ? rb_insert_color+0x32/0x340
[  100.575136]  ? srso_return_thunk+0x5/0x5f
[  100.575152]  ? tick_program_event+0x58/0xa0
[  100.575175]  tick_program_event+0x1f/0xa0
[  100.575195]  hrtimer_reprogram+0x16e/0x180
[  100.575219]  hrtimer_start_range_ns+0x420/0x5d0
[  100.575265]  ? srso_return_thunk+0x5/0x5f
[  100.575289]  tick_nohz_restart_sched_tick+0xc7/0x100
[  100.575314]  tick_nohz_idle_exit+0xb7/0x150
[  100.575342]  do_idle+0x13e/0x240
[  100.575364]  ? complete+0x54/0x80
[  100.575384]  cpu_startup_entry+0x29/0x30
[  100.575406]  start_secondary+0x11c/0x140
[  100.575427]  common_startup_64+0x13e/0x141
[  100.575478]  </TASK>
[  192.475299] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[  192.476938] rcu:     4-...!: (0 ticks this GP) idle=de5c/1/0x4000000000000000 softirq=553/553 fqs=69
[  192.479152] rcu:     (detected by 13, t=28559 jiffies, g=1513, q=55 ncpus=32)
[  192.480855] Sending NMI from CPU 13 to CPUs 4:
[  192.482000] NMI backtrace for cpu 4
[  192.482014] CPU: 4 PID: 783 Comm: sudo Tainted: G      D            6.9.0-rc1+ #83
[  192.482057] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[  192.482073] RIP: 0010:__tsan_unaligned_volatile_read4+0x3c/0x130
[  192.482111] Code: 4c 8b 5c 24 08 83 e3 03 48 b9 ff ff ff ff ff ff 01 00 25 f8 01 00 00 49 21 ca 4c 8d 80 60 f8 6d b3 48 05 78 f8 6d b3 4d 8b 08 <4d> 85 c9 79 2a 4c 89 ca 4c 89 ce 48 c1 ea 31 48 21 ce 81 e2 ff
[  192.482131] RSP: 0018:ffffbae1c0f5b818 EFLAGS: 00000096
[  192.482148] RAX: ffffffffb36dfa50 RBX: 0000000000000000 RCX: 0001ffffffffffff
[  192.482161] RDX: 0000000080000001 RSI: 0000000000000004 RDI: ffffffffb363b80c
[  192.482175] RBP: 0000000000000000 R08: ffffffffb36dfa38 R09: 0000000000000000
[  192.482187] R10: 0001ffffb363b80c R11: ffffffffb1c8b879 R12: 0000000000000001
[  192.482211] R13: 0000000000000000 R14: ffff9b9d1f0363c8 R15: 0000000000000004
[  192.482226] FS:  00007f65e3a91f00(0000) GS:ffff9b9d1f000000(0000) knlGS:0000000000000000
[  192.482243] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  192.482257] CR2: 000000000003478c CR3: 0000000102e26000 CR4: 00000000003506f0
[  192.482271] Call Trace:
[  192.482280]  <NMI>
[  192.482292]  ? nmi_cpu_backtrace+0xee/0x190
[  192.482330]  ? nmi_cpu_backtrace_handler+0x11/0x20
[  192.482356]  ? nmi_handle+0x61/0x150
[  192.482407]  ? default_do_nmi+0x42/0x100
[  192.482435]  ? exc_nmi+0x122/0x1a0
[  192.482458]  ? end_repeat_nmi+0xf/0x53
[  192.482489]  ? __pv_queued_spin_lock_slowpath+0x119/0x660
[  192.482531]  ? __tsan_unaligned_volatile_read4+0x3c/0x130
[  192.482562]  ? __tsan_unaligned_volatile_read4+0x3c/0x130
[  192.482595]  ? __tsan_unaligned_volatile_read4+0x3c/0x130
[  192.482628]  </NMI>
[  192.482636]  <TASK>
[  192.482644]  __pv_queued_spin_lock_slowpath+0x119/0x660
[  192.482678]  ? srso_return_thunk+0x5/0x5f
[  192.482719]  oops_begin+0x8c/0x90
[  192.482740]  page_fault_oops+0x62/0x4f0
[  192.482767]  ? srso_return_thunk+0x5/0x5f
[  192.482786]  ? get_page_from_freelist+0x1274/0x1400
[  192.482825]  exc_page_fault+0x81/0x190
[  192.482863]  asm_exc_page_fault+0x26/0x30
[  192.482901] RIP: 0010:kcsan_setup_watchpoint+0x3cc/0x400
[  192.482931] Code: 8b 04 24 4c 89 c2 48 31 c2 e9 69 fe ff ff 45 31 c0 e9 c3 fd ff ff 4c 89 c2 31 c0 e9 57 fe ff ff 45 0f b6 04 24 e9 af fd ff ff <45> 8b 04 24 e9 a6 fd ff ff 85 c9 74 08 f0 48 ff 05 b7 b2 8f 09
[  192.482949] RSP: 0018:ffffbae1c0f5b9f0 EFLAGS: 00010046
[  192.482974] RAX: 0000000000000000 RBX: ffff9b95c4ba93b0 RCX: 0000000000000034
[  192.483004] RDX: 0000000000000001 RSI: ffffffffb0f81714 RDI: 0000000000000000
[  192.483017] RBP: 0000000000000004 R08: 00000000aaaaaaab R09: 0000000000000000
[  192.483030] R10: 0000000000000286 R11: 000800000003478c R12: 000000000003478c
[  192.483043] R13: 0000000000000035 R14: 0000000000000000 R15: 0000000000000000
[  192.483067]  ? __mod_memcg_lruvec_state+0x214/0x220
[  192.483110]  __mod_memcg_lruvec_state+0x214/0x220
[  192.483153]  __mod_lruvec_state+0x41/0x50
[  192.483180]  __lruvec_stat_mod_folio+0xb9/0x110
[  192.483209]  folio_remove_rmap_ptes+0xaa/0x160
[  192.483246]  unmap_page_range+0x128c/0x2240
[  192.483306]  unmap_single_vma+0xbe/0x130
[  192.483353]  unmap_vmas+0x16b/0x2d0
[  192.483392]  exit_mmap+0x141/0x530
[  192.483448]  __mmput+0x86/0x1d0
[  192.483493]  mmput+0x3f/0x50
[  192.483517]  do_exit+0x4d0/0x12f0
[  192.483557]  make_task_dead+0xe0/0x200
[  192.483588]  rewind_stack_and_make_dead+0x16/0x20
[  192.483612] RIP: 0033:0x7f65e3c30240
[  192.483628] Code: Unable to access opcode bytes at 0x7f65e3c30216.
[  192.483644] RSP: 002b:00007ffc8ae74e18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[  192.483672] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f65e3c30240
[  192.483685] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c
[  192.483698] RBP: 0000563ac0e0c060 R08: 000000000000001d R09: 00007ffc8ae74d00
[  192.483710] R10: 00007f65e3a91da0 R11: 0000000000000202 R12: 0000563ac0e0c060
[  192.483723] R13: 0000000000000208 R14: 00007f65e3d33045 R15: 00007ffc8ae75220
[  192.483756]  </TASK>
[  192.483764] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.766 msecs
[  192.483987] rcu: rcu_preempt kthread starved for 28423 jiffies! g1513 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=7
[  192.562051] rcu:     Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
[  192.562913] rcu: RCU grace-period kthread stack dump:
[  192.563385] task:rcu_preempt     state:R  running task     stack:0     pid:16    tgid:16    ppid:2      flags:0x00004000
[  192.564400] Call Trace:
[  192.564646]  <TASK>
[  192.564872]  __schedule+0x3eb/0xab0
[  192.565250]  schedule+0x27/0xf0
[  192.565578]  schedule_timeout+0xe0/0x200
[  192.565983]  ? __pfx_process_timeout+0x10/0x10
[  192.566443]  rcu_gp_fqs_loop+0x1e1/0x850
[  192.566849]  ? __pfx_rcu_gp_kthread+0x10/0x10
[  192.567299]  rcu_gp_kthread+0x190/0x2a0
[  192.567689]  ? __pfx_rcu_gp_kthread+0x10/0x10
[  192.568124]  kthread+0x179/0x1b0
[  192.568458]  ? __pfx_kthread+0x10/0x10
[  192.568852]  ret_from_fork+0x34/0x50
[  192.569208]  ? __pfx_kthread+0x10/0x10
[  192.569584]  ret_from_fork_asm+0x1a/0x30
[  192.569997]  </TASK>
[  192.570217] rcu: Stack dump where RCU GP kthread last ran:
[  192.570717] Sending NMI from CPU 13 to CPUs 7:
[  192.571165] NMI backtrace for cpu 7
[  192.571185] CPU: 7 PID: 0 Comm: swapper/7 Tainted: G      D            6.9.0-rc1+ #83
[  192.571208] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[  192.571223] RIP: 0010:__pv_queued_spin_lock_slowpath+0xff/0x660
[  192.571264] Code: 01 00 00 00 48 89 04 24 e8 1e 92 15 ff c6 45 14 00 48 89 6c 24 08 eb 12 81 fd ff ff 00 00 76 54 81 e5 00 ff 00 00 75 4c f3 90 <ba> 04 00 00 00 be 04 00 00 00 48 89 df e8 5f 98 15 ff 48 89 d8
[  192.571298] RSP: 0018:ffffbae1c00e3b78 EFLAGS: 00000046
[  192.571324] RAX: ffff9b95c08713b0 RBX: ffffffffb363b80c RCX: 0001ffffffffffff
[  192.571337] RDX: ffff9b95c0870000 RSI: 0000000000000004 RDI: ffffffffb363b80c
[  192.571349] RBP: 0000000000000000 R08: ffffffffb36dfa50 R09: 0000000000000000
[  192.571362] R10: 0001ffffb363b80c R11: ffffffffb1c8b879 R12: 0000000000000001
[  192.571375] R13: 0000000000000000 R14: ffff9b9d1f1b63c8 R15: 0000000000000007
[  192.571400] FS:  0000000000000000(0000) GS:ffff9b9d1f180000(0000) knlGS:0000000000000000
[  192.571416] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  192.571450] CR2: 0000000000025f30 CR3: 000000056e220000 CR4: 00000000003506f0
[  192.571465] Call Trace:
[  192.571474]  <NMI>
[  192.571488]  ? nmi_cpu_backtrace+0xee/0x190
[  192.571526]  ? nmi_cpu_backtrace_handler+0x11/0x20
[  192.571552]  ? nmi_handle+0x61/0x150
[  192.571581]  ? default_do_nmi+0x42/0x100
[  192.571606]  ? exc_nmi+0x122/0x1a0
[  192.571628]  ? end_repeat_nmi+0xf/0x53
[  192.571657]  ? __pv_queued_spin_lock_slowpath+0x119/0x660
[  192.571730]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  192.571771]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  192.571806]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  192.571847]  </NMI>
[  192.571855]  <TASK>
[  192.571864]  ? srso_return_thunk+0x5/0x5f
[  192.571890]  oops_begin+0x8c/0x90
[  192.571911]  page_fault_oops+0x62/0x4f0
[  192.571938]  ? srso_return_thunk+0x5/0x5f
[  192.571966]  exc_page_fault+0x81/0x190
[  192.572008]  asm_exc_page_fault+0x26/0x30
[  192.572029] RIP: 0010:kcsan_setup_watchpoint+0x2b3/0x400
[  192.572052] Code: ea 00 f0 48 ff 05 25 b4 8f 02 eb e0 65 48 8b 05 7b 53 23 4f 48 8d 98 c0 02 03 00 e9 9f fd ff ff 48 83 fd 08 0f 85 fd 00 00 00 <4d> 8b 04 24 e9 bf fe ff ff 49 85 d1 75 54 ba 01 00 00 00 4a 84
[  192.572071] RSP: 0018:ffffbae1c00e3d40 EFLAGS: 00010046
[  192.572086] RAX: 0000000000000000 RBX: ffff9b95c08713b0 RCX: 0000000000000025
[  192.572099] RDX: 0000000000000001 RSI: ffffffffb0c40cdf RDI: 0000000000000000
[  192.572111] RBP: 0000000000000008 R08: 00000000aaaaaaab R09: 0000000000000000
[  192.572124] R10: 0000000000000082 R11: 0010000000025f30 R12: 0000000000025f30
[  192.572137] R13: 0000000000000026 R14: 0000000000000000 R15: 0000000000000000
[  192.572178]  ? tick_program_event+0x1f/0xa0
[  192.572208]  ? rb_insert_color+0x32/0x340
[  192.572230]  ? srso_return_thunk+0x5/0x5f
[  192.572260]  ? tick_program_event+0x58/0xa0
[  192.572287]  tick_program_event+0x1f/0xa0
[  192.572311]  hrtimer_reprogram+0x16e/0x180
[  192.572338]  hrtimer_start_range_ns+0x420/0x5d0
[  192.572360]  ? srso_return_thunk+0x5/0x5f
[  192.572389]  tick_nohz_restart_sched_tick+0xc7/0x100
[  192.572421]  tick_nohz_idle_exit+0xb7/0x150
[  192.572451]  do_idle+0x13e/0x240
[  192.572475]  ? complete+0x54/0x80
[  192.572499]  cpu_startup_entry+0x29/0x30
[  192.572525]  start_secondary+0x11c/0x140
[  192.572554]  common_startup_64+0x13e/0x141
[  192.572600]  </TASK>
[  260.495301] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[  260.496934] rcu:     4-...!: (0 ticks this GP) idle=de5c/1/0x4000000000000000 softirq=553/553 fqs=69
[  260.499148] rcu:     (detected by 24, t=45565 jiffies, g=1513, q=55 ncpus=32)
[  260.500840] Sending NMI from CPU 24 to CPUs 4:
[  260.501976] NMI backtrace for cpu 4
[  260.501990] CPU: 4 PID: 783 Comm: sudo Tainted: G      D            6.9.0-rc1+ #83
[  260.502012] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[  260.502028] RIP: 0010:__pv_queued_spin_lock_slowpath+0xff/0x660
[  260.502068] Code: 01 00 00 00 48 89 04 24 e8 1e 92 15 ff c6 45 14 00 48 89 6c 24 08 eb 12 81 fd ff ff 00 00 76 54 81 e5 00 ff 00 00 75 4c f3 90 <ba> 04 00 00 00 be 04 00 00 00 48 89 df e8 5f 98 15 ff 48 89 d8
[  260.502087] RSP: 0018:ffffbae1c0f5b828 EFLAGS: 00000046
[  260.502104] RAX: ffff9b95c4ba93b0 RBX: ffffffffb363b80c RCX: 0001ffffffffffff
[  260.502118] RDX: ffff9b95c4ba8000 RSI: 0000000000000004 RDI: ffffffffb363b80c
[  260.502151] RBP: 0000000000000000 R08: ffffffffb36dfa50 R09: 0000000000000000
[  260.502164] R10: 0001ffffb363b80c R11: ffffffffb1c8b879 R12: 0000000000000001
[  260.502177] R13: 0000000000000000 R14: ffff9b9d1f0363c8 R15: 0000000000000004
[  260.502198] FS:  00007f65e3a91f00(0000) GS:ffff9b9d1f000000(0000) knlGS:0000000000000000
[  260.502215] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  260.502229] CR2: 000000000003478c CR3: 0000000102e26000 CR4: 00000000003506f0
[  260.502244] Call Trace:
[  260.502253]  <NMI>
[  260.502265]  ? nmi_cpu_backtrace+0xee/0x190
[  260.502308]  ? nmi_cpu_backtrace_handler+0x11/0x20
[  260.502337]  ? nmi_handle+0x61/0x150
[  260.502367]  ? default_do_nmi+0x42/0x100
[  260.502399]  ? exc_nmi+0x122/0x1a0
[  260.502421]  ? end_repeat_nmi+0xf/0x53
[  260.502451]  ? __pv_queued_spin_lock_slowpath+0x119/0x660
[  260.502494]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  260.502533]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  260.502596]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  260.502630]  </NMI>
[  260.502637]  <TASK>
[  260.502647]  ? srso_return_thunk+0x5/0x5f
[  260.502672]  oops_begin+0x8c/0x90
[  260.502693]  page_fault_oops+0x62/0x4f0
[  260.502719]  ? srso_return_thunk+0x5/0x5f
[  260.502752]  ? get_page_from_freelist+0x1274/0x1400
[  260.502803]  exc_page_fault+0x81/0x190
[  260.502841]  asm_exc_page_fault+0x26/0x30
[  260.502861] RIP: 0010:kcsan_setup_watchpoint+0x3cc/0x400
[  260.502885] Code: 8b 04 24 4c 89 c2 48 31 c2 e9 69 fe ff ff 45 31 c0 e9 c3 fd ff ff 4c 89 c2 31 c0 e9 57 fe ff ff 45 0f b6 04 24 e9 af fd ff ff <45> 8b 04 24 e9 a6 fd ff ff 85 c9 74 08 f0 48 ff 05 b7 b2 8f 09
[  260.502904] RSP: 0018:ffffbae1c0f5b9f0 EFLAGS: 00010046
[  260.502919] RAX: 0000000000000000 RBX: ffff9b95c4ba93b0 RCX: 0000000000000034
[  260.502933] RDX: 0000000000000001 RSI: ffffffffb0f81714 RDI: 0000000000000000
[  260.502945] RBP: 0000000000000004 R08: 00000000aaaaaaab R09: 0000000000000000
[  260.502958] R10: 0000000000000286 R11: 000800000003478c R12: 000000000003478c
[  260.502971] R13: 0000000000000035 R14: 0000000000000000 R15: 0000000000000000
[  260.503012]  ? __mod_memcg_lruvec_state+0x214/0x220
[  260.503054]  __mod_memcg_lruvec_state+0x214/0x220
[  260.503090]  __mod_lruvec_state+0x41/0x50
[  260.503117]  __lruvec_stat_mod_folio+0xb9/0x110
[  260.503147]  folio_remove_rmap_ptes+0xaa/0x160
[  260.503183]  unmap_page_range+0x128c/0x2240
[  260.503262]  unmap_single_vma+0xbe/0x130
[  260.503295]  unmap_vmas+0x16b/0x2d0
[  260.503355]  exit_mmap+0x141/0x530
[  260.503412]  __mmput+0x86/0x1d0
[  260.503460]  mmput+0x3f/0x50
[  260.503494]  do_exit+0x4d0/0x12f0
[  260.503534]  make_task_dead+0xe0/0x200
[  260.503566]  rewind_stack_and_make_dead+0x16/0x20
[  260.503594] RIP: 0033:0x7f65e3c30240
[  260.503610] Code: Unable to access opcode bytes at 0x7f65e3c30216.
[  260.503620] RSP: 002b:00007ffc8ae74e18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[  260.503642] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f65e3c30240
[  260.503656] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c
[  260.503668] RBP: 0000563ac0e0c060 R08: 000000000000001d R09: 00007ffc8ae74d00
[  260.503681] R10: 00007f65e3a91da0 R11: 0000000000000202 R12: 0000563ac0e0c060
[  260.503694] R13: 0000000000000208 R14: 00007f65e3d33045 R15: 00007ffc8ae75220
[  260.503727]  </TASK>
[  260.503963] rcu: rcu_preempt kthread starved for 45428 jiffies! g1513 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=7
[  260.583746] rcu:     Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
[  260.584570] rcu: RCU grace-period kthread stack dump:
[  260.585042] task:rcu_preempt     state:R  running task     stack:0     pid:16    tgid:16    ppid:2      flags:0x00004000
[  260.586069] Call Trace:
[  260.586311]  <TASK>
[  260.586531]  __schedule+0x3eb/0xab0
[  260.586900]  schedule+0x27/0xf0
[  260.587222]  schedule_timeout+0xe0/0x200
[  260.587655]  ? __pfx_process_timeout+0x10/0x10
[  260.588098]  rcu_gp_fqs_loop+0x1e1/0x850
[  260.588489]  ? __pfx_rcu_gp_kthread+0x10/0x10
[  260.588928]  rcu_gp_kthread+0x190/0x2a0
[  260.589308]  ? __pfx_rcu_gp_kthread+0x10/0x10
[  260.589751]  kthread+0x179/0x1b0
[  260.590081]  ? __pfx_kthread+0x10/0x10
[  260.590455]  ret_from_fork+0x34/0x50
[  260.590811]  ? __pfx_kthread+0x10/0x10
[  260.591193]  ret_from_fork_asm+0x1a/0x30
[  260.591598]  </TASK>
[  260.591820] rcu: Stack dump where RCU GP kthread last ran:
[  260.592321] Sending NMI from CPU 24 to CPUs 7:
[  260.592785] NMI backtrace for cpu 7
[  260.592805] CPU: 7 PID: 0 Comm: swapper/7 Tainted: G      D            6.9.0-rc1+ #83
[  260.592828] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[  260.592844] RIP: 0010:__pv_queued_spin_lock_slowpath+0xff/0x660
[  260.592894] Code: 01 00 00 00 48 89 04 24 e8 1e 92 15 ff c6 45 14 00 48 89 6c 24 08 eb 12 81 fd ff ff 00 00 76 54 81 e5 00 ff 00 00 75 4c f3 90 <ba> 04 00 00 00 be 04 00 00 00 48 89 df e8 5f 98 15 ff 48 89 d8
[  260.592913] RSP: 0018:ffffbae1c00e3b78 EFLAGS: 00000046
[  260.592930] RAX: ffff9b95c08713b0 RBX: ffffffffb363b80c RCX: 0001ffffffffffff
[  260.592943] RDX: ffff9b95c0870000 RSI: 0000000000000004 RDI: ffffffffb363b80c
[  260.592956] RBP: 0000000000000000 R08: ffffffffb36dfa50 R09: 0000000000000000
[  260.592969] R10: 0001ffffb363b80c R11: ffffffffb1c8b879 R12: 0000000000000001
[  260.592982] R13: 0000000000000000 R14: ffff9b9d1f1b63c8 R15: 0000000000000007
[  260.592997] FS:  0000000000000000(0000) GS:ffff9b9d1f180000(0000) knlGS:0000000000000000
[  260.593014] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  260.593027] CR2: 0000000000025f30 CR3: 000000056e220000 CR4: 00000000003506f0
[  260.593057] Call Trace:
[  260.593066]  <NMI>
[  260.593080]  ? nmi_cpu_backtrace+0xee/0x190
[  260.593116]  ? nmi_cpu_backtrace_handler+0x11/0x20
[  260.593147]  ? nmi_handle+0x61/0x150
[  260.593179]  ? default_do_nmi+0x42/0x100
[  260.593204]  ? exc_nmi+0x122/0x1a0
[  260.593226]  ? end_repeat_nmi+0xf/0x53
[  260.593255]  ? __pv_queued_spin_lock_slowpath+0x119/0x660
[  260.593293]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  260.593336]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  260.593371]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  260.593420]  </NMI>
[  260.593427]  <TASK>
[  260.593436]  ? srso_return_thunk+0x5/0x5f
[  260.593463]  oops_begin+0x8c/0x90
[  260.593484]  page_fault_oops+0x62/0x4f0
[  260.593511]  ? srso_return_thunk+0x5/0x5f
[  260.593539]  exc_page_fault+0x81/0x190
[  260.593570]  asm_exc_page_fault+0x26/0x30
[  260.593601] RIP: 0010:kcsan_setup_watchpoint+0x2b3/0x400
[  260.593624] Code: ea 00 f0 48 ff 05 25 b4 8f 02 eb e0 65 48 8b 05 7b 53 23 4f 48 8d 98 c0 02 03 00 e9 9f fd ff ff 48 83 fd 08 0f 85 fd 00 00 00 <4d> 8b 04 24 e9 bf fe ff ff 49 85 d1 75 54 ba 01 00 00 00 4a 84
[  260.593650] RSP: 0018:ffffbae1c00e3d40 EFLAGS: 00010046
[  260.593665] RAX: 0000000000000000 RBX: ffff9b95c08713b0 RCX: 0000000000000025
[  260.593678] RDX: 0000000000000001 RSI: ffffffffb0c40cdf RDI: 0000000000000000
[  260.593691] RBP: 0000000000000008 R08: 00000000aaaaaaab R09: 0000000000000000
[  260.593703] R10: 0000000000000082 R11: 0010000000025f30 R12: 0000000000025f30
[  260.593725] R13: 0000000000000026 R14: 0000000000000000 R15: 0000000000000000
[  260.593749]  ? tick_program_event+0x1f/0xa0
[  260.593798]  ? rb_insert_color+0x32/0x340
[  260.593822]  ? srso_return_thunk+0x5/0x5f
[  260.593841]  ? tick_program_event+0x58/0xa0
[  260.593875]  tick_program_event+0x1f/0xa0
[  260.593899]  hrtimer_reprogram+0x16e/0x180
[  260.593926]  hrtimer_start_range_ns+0x420/0x5d0
[  260.593948]  ? srso_return_thunk+0x5/0x5f
[  260.593977]  tick_nohz_restart_sched_tick+0xc7/0x100
[  260.594008]  tick_nohz_idle_exit+0xb7/0x150
[  260.594042]  do_idle+0x13e/0x240
[  260.594067]  ? complete+0x54/0x80
[  260.594093]  cpu_startup_entry+0x29/0x30
[  260.594119]  start_secondary+0x11c/0x140
[  260.594143]  common_startup_64+0x13e/0x141
[  260.594188]  </TASK>
[  323.527289] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
[  323.528135] rcu:     4-...!: (0 ticks this GP) idle=de5c/1/0x4000000000000000 softirq=553/553 fqs=69
[  323.529214] rcu:     (detected by 24, t=61323 jiffies, g=1513, q=86 ncpus=32)
[  323.530031] Sending NMI from CPU 24 to CPUs 4:
[  323.530593] NMI backtrace for cpu 4
[  323.530607] CPU: 4 PID: 783 Comm: sudo Tainted: G      D            6.9.0-rc1+ #83
[  323.530631] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[  323.530647] RIP: 0010:__kcsan_check_access+0x9e/0x180
[  573.907289] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: ff 48 39 ea 0f 83 d0 00 00 00 49 83 c0 08 49 39 c0 75 be 65 8b 15 1a f6 24 4f <f7> c2 09605]  </TASK>
[  573.908228] rcu:     4-...!: (0 ticks this GP) idle=de5c/1/0x4000000000000000 softirq=553/553 fqs=69
[  573.909496] rcu:     (detected by 21, t=123918 jiffies, g=1513, q=86 ncpus=32)
[  573.910480] Sending NMI from CPU 21 to CPUs 4:
[  573.911131] NMI backtrace for cpu 4
[  573.911145] CPU: 4 PID: 783 Comm: sudo Tainted: G      D            6.9.0-rc1+ #83
[  573.911170] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[  573.911188] RIP: 0010:__pv_queued_spin_lock_slowpath+0xff/0x660
[  573.911249] Code: 01 00 00 00 48 89 04 24 e8 1e 92 15 ff c6 45 14 00 48 89 6c 24 08 eb 12 81 fd ff ff 00 00 76 54 81 e5 00 ff 00 00 75 4c f3 90 <ba> 04 00 00 00 be 04 00 00 00 48 89 df e8 5f 98 15 ff 48 89 d8
[  573.911270] RSP: 0018:ffffbae1c0f5b828 EFLAGS: 00000046
[  573.911291] RAX: ffff9b95c4ba93b0 RBX: ffffffffb363b80c RCX: 0001ffffffffffff
[  573.911306] RDX: ffff9b95c4ba8000 RSI: 0000000000000004 RDI: ffffffffb363b80c
[  573.911321] RBP: 0000000000000000 R08: ffffffffb36dfa50 R09: 0000000000000000
[  573.911337] R10: 0001ffffb363b80c R11: ffffffffb1c8b879 R12: 0000000000000001
[  573.911361] R13: 0000000000000000 R14: ffff9b9d1f0363c8 R15: 0000000000000004
[  573.911378] FS:  00007f65e3a91f00(0000) GS:ffff9b9d1f000000(0000) knlGS:0000000000000000
[  573.911398] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  573.911414] CR2: 000000000003478c CR3: 0000000102e26000 CR4: 00000000003506f0
[  573.911430] Call Trace:
[  573.911449]  <NMI>
[  573.911465]  ? nmi_cpu_backtrace+0xee/0x190
[  573.911507]  ? nmi_cpu_backtrace_handler+0x11/0x20
[  573.911538]  ? nmi_handle+0x61/0x150
[  573.911586]  ? default_do_nmi+0x42/0x100
[  573.911616]  ? exc_nmi+0x122/0x1a0
[  573.911643]  ? end_repeat_nmi+0xf/0x53
[  573.911697]  ? __pv_queued_spin_lock_slowpath+0x119/0x660
[  573.911750]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  573.911790]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  573.911831]  ? __pv_queued_spin_lock_slowpath+0xff/0x660
[  573.911870]  </NMI>
[  573.911879]  <TASK>
[  573.911890]  ? srso_return_thunk+0x5/0x5f
[  573.911919]  oops_begin+0x8c/0x90
[  573.911943]  page_fault_oops+0x62/0x4f0
[  573.911974]  ? srso_return_thunk+0x5/0x5f
[  573.911996]  ? get_page_from_freelist+0x1274/0x1400
[  573.912061]  exc_page_fault+0x81/0x190
[  573.912098]  asm_exc_page_fault+0x26/0x30
[  573.912122] RIP: 0010:kcsan_setup_watchpoint+0x3cc/0x400
[  573.912155] Code: 8b 04 24 4c 89 c2 48 31 c2 e9 69 fe ff ff 45 31 c0 e9 c3 fd ff ff 4c 89 c2 31 c0 e9 57 fe ff ff 45 0f b6 04 24 e9 af fd ff ff <45> 8b 04 24 e9 a6 fd ff ff 85 c9 74 08 f0 48 ff 05 b7 b2 8f 09
[  573.912176] RSP: 0018:ffffbae1c0f5b9f0 EFLAGS: 00010046
[  573.912195] RAX: 0000000000000000 RBX: ffff9b95c4ba93b0 RCX: 0000000000000034
[  573.912210] RDX: 0000000000000001 RSI: ffffffffb0f81714 RDI: 0000000000000000
[  573.912238] RBP: 0000000000000004 R08: 00000000aaaaaaab R09: 0000000000000000
[  573.912254] R10: 0000000000000286 R11: 000800000003478c R12: 000000000003478c
[  573.912268] R13: 0000000000000035 R14: 0000000000000000 R15: 0000000000000000
[  573.912296]  ? __mod_memcg_lruvec_state+0x214/0x220
[  573.912345]  __mod_memcg_lruvec_state+0x214/0x220
[  573.912393]  __mod_lruvec_state+0x41/0x50
[  573.912423]  __lruvec_stat_mod_folio+0xb9/0x110
[  573.912472]  folio_remove_rmap_ptes+0xaa/0x160
[  573.912514]  unmap_page_range+0x128c/0x2240
[  573.912582]  unmap_single_vma+0xbe/0x130
[  573.912625]  unmap_vmas+0x16b/0x2d0
[  573.912670]  exit_mmap+0x141/0x530
[  573.912735]  __mmput+0x86/0x1d0
[  573.912769]  mmput+0x3f/0x50
[  573.912807]  do_exit+0x4d0/0x12f0
[  573.912860]  make_task_dead+0xe0/0x200
[  573.912897]  rewind_stack_and_make_dead+0x16/0x20
[  573.912923] RIP: 0033:0x7f65e3c30240
[  573.912952] Code: Unable to access opcode bytes at 0x7f65e3c30216.
[  573.912962] RSP: 002b:00007ffc8ae74e18 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
[  573.912985] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f65e3c30240
[  573.912999] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000000000000c
[  573.913026] RBP: 0000563ac0e0c060 R08: 000000000000001d R09: 00007ffc8ae74d00
[  573.913042] R10: 00007f65e3a91da0 R11: 0000000000000202 R12: 0000563ac0e0c060
[  573.913056] R13: 0000000000000208 R14: 00007f65e3d33045 R15: 00007ffc8ae75220
[  573.913096]  </TASK>
[  573.913106] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.976 msecs
[  573.914104] rcu: rcu_preempt kthread starved for 123780 jiffies! g1513 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=7
[  573.961837] rcu:     Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
[  573.962736] rcu: RCU grace-period kthread stack dump:
[  573.963243] task:rcu_preempt     state:R  running task     stack:0     pid:16    tgid:16    ppid:2      flags:0x00004000
[  573.964363] Call Trace:
[  573.964626]  <TASK>
[  573.964859]  __schedule+0x3eb/0xab0
[  573.965253]  schedule+0x27/0xf0
[  573.965623]  schedule_timeout+0xe0/0x200
[  573.966069]  ? __pfx_process_timeout+0x10/0x10
[  573.966551]  rcu_gp_fqs_loop+0x1e1/0x850
[  573.966975]  ? __pfx_rcu_gp_kthread+0x10/0x10
[  573.967437]  rcu_gp_kthread+0x190/0x2a0
[  573.967881]  ? __pfx_rcu_gp_kthread+0x10/0x10
[  573.968339]  kthread+0x179/0x1b0
[  573.968704]  ? __pfx_kthread+0x10/0x10
[  573.969112]  ret_from_fork+0x34/0x50
[  573.969500]  ? __pfx_kthread+0x10/0x10
[  573.969912]  ret_from_fork_asm+0x1a/0x30
[  573.970343]  </TASK>
[  573.970590] rcu: Stack dump where RCU GP kthread last ran:
[  573.971129] Sending NMI from CPU 21 to CPUs 7:
[  573.971624] NMI backtrace for cpu 7
[  573.971642] CPU: 7 PID: 0 Comm: swapper/7 Tainted: G      D            6.9.0-rc1+ #83
[  573.971675] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014
[  573.971691] RIP: 0010:__tsan_unaligned_volatile_read4+0x0/0x130
[  573.971729] Code: 00 41 5c e9 82 db ff ff 5b 5d 41 5c e9 39 e0 ff ff 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 89 f8 53 49 89 fa 48 89 fb 48 c1 e8 09 4c 8b 54
[  573.971748] RSP: 0018:ffffbae1c00e3b70 EFLAGS: 00000046
[  573.971765] RAX: ffff9b95c08713b0 RBX: ffffffffb363b80c RCX: 0001ffffffffffff
[  573.971799] RDX: 0000000000000002 RSI: 0000000000000004 RDI: ffffffffb363b80c
[  573.971812] RBP: 0000000000000000 R08: ffffffffb36dfa50 R09: 0000000000000000
[  573.971825] R10: ffffffffb363b80c R11: ffffffffb1c8b871 R12: 0000000000000001
[  573.971838] R13: 0000000000000000 R14: ffff9b9d1f1b63c8 R15: 0000000000000007
[  573.971852] FS:  0000000000000000(0000) GS:ffff9b9d1f180000(0000) knlGS:0000000000000000
[  573.971869] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  573.971883] CR2: 0000000000025f30 CR3: 000000056e220000 CR4: 00000000003506f0
[  573.971898] Call Trace:
[  573.971907]  <NMI>
[  573.971921]  ? nmi_cpu_backtrace+0xee/0x190
[  573.971959]  ? nmi_cpu_backtrace_handler+0x11/0x20
[  573.971999]  ? nmi_handle+0x61/0x150
[  573.972028]  ? default_do_nmi+0x42/0x100
[  573.972066]  ? exc_nmi+0x122/0x1a0
[  573.972089]  ? end_repeat_nmi+0xf/0x53
[  573.972117]  ? __pv_queued_spin_lock_slowpath+0x111/0x660
[  573.972158]  ? __pfx___tsan_unaligned_volatile_read4+0x10/0x10
[  573.972190]  ? __pfx___tsan_unaligned_volatile_read4+0x10/0x10
[  573.972229]  ? __pfx___tsan_unaligned_volatile_read4+0x10/0x10
[  573.972261]  </NMI>
[  573.972268]  <TASK>
[  573.972276]  __pv_queued_spin_lock_slowpath+0x119/0x660
[  573.972309]  ? srso_return_thunk+0x5/0x5f
[  573.972334]  oops_begin+0x8c/0x90
[  573.972375]  page_fault_oops+0x62/0x4f0
[  573.972403]  ? srso_return_thunk+0x5/0x5f
[  573.972431]  exc_page_fault+0x81/0x190
[  573.972469]  asm_exc_page_fault+0x26/0x30
[  573.972490] RIP: 0010:kcsan_setup_watchpoint+0x2b3/0x400
[  573.972520] Code: ea 00 f0 48 ff 05 25 b4 8f 02 eb e0 65 48 8b 05 7b 53 23 4f 48 8d 98 c0 02 03 00 e9 9f fd ff ff 48 83 fd 08 0f 85 fd 00 00 00 <4d> 8b 04 24 e9 bf fe ff ff 49 85 d1 75 54 ba 01 00 00 00 4a 84
[  573.972553] RSP: 0018:ffffbae1c00e3d40 EFLAGS: 00010046
[  573.972569] RAX: 0000000000000000 RBX: ffff9b95c08713b0 RCX: 0000000000000025
[  573.972582] RDX: 0000000000000001 RSI: ffffffffb0c40cdf RDI: 0000000000000000
[  573.972595] RBP: 0000000000000008 R08: 00000000aaaaaaab R09: 0000000000000000
[  573.972608] R10: 0000000000000082 R11: 0010000000025f30 R12: 0000000000025f30
[  573.972621] R13: 0000000000000026 R14: 0000000000000000 R15: 0000000000000000
[  573.972655]  ? tick_program_event+0x1f/0xa0
[  573.972685]  ? rb_insert_color+0x32/0x340
[  573.972718]  ? srso_return_thunk+0x5/0x5f
[  573.972737]  ? tick_program_event+0x58/0xa0
[  573.972765]  tick_program_event+0x1f/0xa0
[  573.972788]  hrtimer_reprogram+0x16e/0x180
[  573.972821]  hrtimer_start_range_ns+0x420/0x5d0
[  573.972844]  ? srso_return_thunk+0x5/0x5f
[  573.972873]  tick_nohz_restart_sched_tick+0xc7/0x100
[  573.972904]  tick_nohz_idle_exit+0xb7/0x150
[  573.972934]  do_idle+0x13e/0x240
[  573.972960]  ? complete+0x54/0x80
[  573.972983]  cpu_startup_entry+0x29/0x30
[  573.973021]  start_secondary+0x11c/0x140
[  573.973045]  common_startup_64+0x13e/0x141
[  573.973091]  </TASK>