[linux-next:master] [mm,page_owner] 4bedfb314b: BUG:KASAN:null-ptr-deref_in_init_page_owner
From: kernel test robot
Date: Tue Mar 05 2024 - 01:09:01 EST
Hello,
kernel test robot noticed "BUG:KASAN:null-ptr-deref_in_init_page_owner" on:
commit: 4bedfb314bdd85c1662ecc46fa25b33b998f994d ("mm,page_owner: maintain own list of stack_records structs")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
[test failed on linux-next/master 67908bf6954b7635d33760ff6dfc189fc26ccc89]
in testcase: boot
compiler: clang-17
test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G
(please refer to attached dmesg/kmsg for entire log/backtrace)
+-----------------------------------------------------------+------------+------------+
| | 8151c7a35d | 4bedfb314b |
+-----------------------------------------------------------+------------+------------+
| BUG:KASAN:null-ptr-deref_in_init_page_owner | 0 | 24 |
| canonical_address#:#[##] | 0 | 24 |
| RIP:init_page_owner | 0 | 24 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 24 |
+-----------------------------------------------------------+------------+------------+
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202403051032.e2f865a-lkp@xxxxxxxxx
[ 6.582562][ T0] Node 0, zone DMA32: page owner found early allocated 0 pages
[ 6.612136][ T0] Node 0, zone Normal: page owner found early allocated 73871 pages
[ 6.612762][ T0] ==================================================================
[ 6.613351][ T0] BUG: KASAN: null-ptr-deref in init_page_owner (arch/x86/include/asm/atomic.h:28)
[ 6.613893][ T0] Write of size 4 at addr 000000000000001c by task swapper/0
[ 6.614434][ T0]
[ 6.614600][ T0] CPU: 0 PID: 0 Comm: swapper Tainted: G T 6.8.0-rc5-00256-g4bedfb314bdd #1 29e70169ace75ef72d53825e983f3dcb1d5756d9
[ 6.615605][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 6.616367][ T0] Call Trace:
[ 6.616604][ T0] <TASK>
[ 6.616816][ T0] ? dump_stack_lvl (lib/dump_stack.c:?)
[ 6.617161][ T0] ? print_report (mm/kasan/report.c:?)
[ 6.617499][ T0] ? init_page_owner (arch/x86/include/asm/atomic.h:28)
[ 6.617863][ T0] ? kasan_report (mm/kasan/report.c:603)
[ 6.618206][ T0] ? init_page_owner (arch/x86/include/asm/atomic.h:28)
[ 6.618567][ T0] ? kasan_check_range (mm/kasan/generic.c:?)
[ 6.618940][ T0] ? init_page_owner (arch/x86/include/asm/atomic.h:28)
[ 6.619301][ T0] ? mm_core_init (mm/mm_init.c:2790)
[ 6.619627][ T0] ? start_kernel (init/main.c:934)
[ 6.619969][ T0] ? x86_64_start_reservations (??:?)
[ 6.620380][ T0] ? x86_64_start_kernel (??:?)
[ 6.620751][ T0] ? secondary_startup_64_no_verify (arch/x86/kernel/head_64.S:461)
[ 6.621204][ T0] </TASK>
[ 6.621420][ T0] ==================================================================
[ 6.622015][ T0] Disabling lock debugging due to kernel taint
[ 6.622474][ T0] general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT KASAN PTI
[ 6.623342][ T0] KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
[ 6.623960][ T0] CPU: 0 PID: 0 Comm: swapper Tainted: G B T 6.8.0-rc5-00256-g4bedfb314bdd #1 29e70169ace75ef72d53825e983f3dcb1d5756d9
[ 6.624959][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
[ 6.625725][ T0] RIP: 0010:init_page_owner (arch/x86/include/asm/atomic.h:28)
[ 6.626133][ T0] Code: 9c 8e ee fb 48 89 05 55 8f 2d 01 48 8b 1d 0e 8f 2d 01 48 83 c3 1c 48 89 df be 04 00 00 00 e8 dd 5c 8b fa 48 89 d8 48 c1 e8 03 <8a> 04 28 84 c0 0f 85 8a 00 00 00 c7 03 01 00 00 00 48 8b 1d 1e 8f
All code
========
0: 9c pushf
1: 8e ee mov %esi,%gs
3: fb sti
4: 48 89 05 55 8f 2d 01 mov %rax,0x12d8f55(%rip) # 0x12d8f60
b: 48 8b 1d 0e 8f 2d 01 mov 0x12d8f0e(%rip),%rbx # 0x12d8f20
12: 48 83 c3 1c add $0x1c,%rbx
16: 48 89 df mov %rbx,%rdi
19: be 04 00 00 00 mov $0x4,%esi
1e: e8 dd 5c 8b fa call 0xfffffffffa8b5d00
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
2a:* 8a 04 28 mov (%rax,%rbp,1),%al <-- trapping instruction
2d: 84 c0 test %al,%al
2f: 0f 85 8a 00 00 00 jne 0xbf
35: c7 03 01 00 00 00 movl $0x1,(%rbx)
3b: 48 rex.W
3c: 8b .byte 0x8b
3d: 1d .byte 0x1d
3e: 1e (bad)
3f: 8f .byte 0x8f
Code starting with the faulting instruction
===========================================
0: 8a 04 28 mov (%rax,%rbp,1),%al
3: 84 c0 test %al,%al
5: 0f 85 8a 00 00 00 jne 0x95
b: c7 03 01 00 00 00 movl $0x1,(%rbx)
11: 48 rex.W
12: 8b .byte 0x8b
13: 1d .byte 0x1d
14: 1e (bad)
15: 8f .byte 0x8f
[ 6.627591][ T0] RSP: 0000:ffffffff85e07eb8 EFLAGS: 00010007
[ 6.628035][ T0] RAX: 0000000000000003 RBX: 000000000000001c RCX: ffffffff811f54d8
[ 6.628619][ T0] RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff85f3f220
[ 6.629202][ T0] RBP: dffffc0000000000 R08: ffffffff85f3f227 R09: 1ffffffff0be7e44
[ 6.629788][ T0] R10: dffffc0000000000 R11: fffffbfff0be7e45 R12: ffffffff86d96298
[ 6.630372][ T0] R13: 1ffffd40021ffff8 R14: ffffffff86d96888 R15: 0000000000440000
[ 6.630956][ T0] FS: 0000000000000000(0000) GS:ffffffff85f0e000(0000) knlGS:0000000000000000
[ 6.631610][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6.632091][ T0] CR2: ffff88843ffff000 CR3: 0000000005ef2000 CR4: 00000000000000b0
[ 6.632677][ T0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 6.633261][ T0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 6.633849][ T0] Call Trace:
[ 6.634085][ T0] <TASK>
[ 6.634296][ T0] ? __die_body (arch/x86/kernel/dumpstack.c:421)
[ 6.634614][ T0] ? die_addr (arch/x86/kernel/dumpstack.c:?)
[ 6.634930][ T0] ? exc_general_protection (arch/x86/kernel/traps.c:?)
[ 6.635339][ T0] ? kasan_report (mm/kasan/report.c:?)
[ 6.635682][ T0] ? asm_exc_general_protection (arch/x86/include/asm/idtentry.h:564)
[ 6.636104][ T0] ? add_taint (arch/x86/include/asm/bitops.h:60 include/asm-generic/bitops/instrumented-atomic.h:29 kernel/panic.c:543)
[ 6.636413][ T0] ? init_page_owner (arch/x86/include/asm/atomic.h:28)
[ 6.636775][ T0] ? init_page_owner (arch/x86/include/asm/atomic.h:28)
[ 6.637136][ T0] ? mm_core_init (mm/mm_init.c:2790)
[ 6.637465][ T0] ? start_kernel (init/main.c:934)
[ 6.637810][ T0] ? x86_64_start_reservations (??:?)
[ 6.638222][ T0] ? x86_64_start_kernel (??:?)
[ 6.638594][ T0] ? secondary_startup_64_no_verify (arch/x86/kernel/head_64.S:461)
[ 6.639046][ T0] </TASK>
[ 6.639263][ T0] Modules linked in:
[ 6.639547][ T0] ---[ end trace 0000000000000000 ]---
[ 6.639942][ T0] RIP: 0010:init_page_owner (arch/x86/include/asm/atomic.h:28)
[ 6.640348][ T0] Code: 9c 8e ee fb 48 89 05 55 8f 2d 01 48 8b 1d 0e 8f 2d 01 48 83 c3 1c 48 89 df be 04 00 00 00 e8 dd 5c 8b fa 48 89 d8 48 c1 e8 03 <8a> 04 28 84 c0 0f 85 8a 00 00 00 c7 03 01 00 00 00 48 8b 1d 1e 8f
All code
========
0: 9c pushf
1: 8e ee mov %esi,%gs
3: fb sti
4: 48 89 05 55 8f 2d 01 mov %rax,0x12d8f55(%rip) # 0x12d8f60
b: 48 8b 1d 0e 8f 2d 01 mov 0x12d8f0e(%rip),%rbx # 0x12d8f20
12: 48 83 c3 1c add $0x1c,%rbx
16: 48 89 df mov %rbx,%rdi
19: be 04 00 00 00 mov $0x4,%esi
1e: e8 dd 5c 8b fa call 0xfffffffffa8b5d00
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
2a:* 8a 04 28 mov (%rax,%rbp,1),%al <-- trapping instruction
2d: 84 c0 test %al,%al
2f: 0f 85 8a 00 00 00 jne 0xbf
35: c7 03 01 00 00 00 movl $0x1,(%rbx)
3b: 48 rex.W
3c: 8b .byte 0x8b
3d: 1d .byte 0x1d
3e: 1e (bad)
3f: 8f .byte 0x8f
Code starting with the faulting instruction
===========================================
0: 8a 04 28 mov (%rax,%rbp,1),%al
3: 84 c0 test %al,%al
5: 0f 85 8a 00 00 00 jne 0x95
b: c7 03 01 00 00 00 movl $0x1,(%rbx)
11: 48 rex.W
12: 8b .byte 0x8b
13: 1d .byte 0x1d
14: 1e (bad)
15: 8f .byte 0x8f
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240305/202403051032.e2f865a-lkp@xxxxxxxxx
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki