arm: TI BeagleBoard X15 : Unable to handle kernel NULL pointer dereference at virtual address 00000369 - Internal error: Oops: 5 [#1] SMP ARM

[Naresh Kamboju]

Following kernel oops found while booting arm 32 bit x15 device with
kselftest configs enabled on stable-rc linux-5.15. This is specific
to kselftest merge config build booting on arm TI BeagleBoard X15
device.

This is an intermittent issue and not specific to current stable rc
release.

Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>

[    0.000000] Linux version 5.15.78-rc1 (tuxmake@tuxmake)
(arm-linux-gnueabihf-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld
(GNU Binutils for Debian) 2.35.2) #1 SMP @1667916073
[    0.000000] CPU: ARMv7 Processor [412fc0f2] revision 2 (ARMv7), cr=10c5387d
...
[    5.375946] 8<--- cut here ---
[    5.379089] Unable to handle kernel NULL pointer dereference at
virtual address 00000369
[    5.387237] pgd = (ptrval)
[    5.389953] [00000369] *pgd=00000000
[    5.393585] Internal error: Oops: 5 [#1] SMP ARM
[    5.398223] Modules linked in:
[    5.401306] CPU: 0 PID: 8 Comm: kworker/0:0H Not tainted 5.15.78-rc1 #1
[    5.407958] Hardware name: Generic DRA74X (Flattened Device Tree)
[    5.414093] PC is at do_page_fault+0x94/0x464
[    5.418487] LR is at do_translation_fault+0xc0/0xc4
[    5.423400] pc : [<c15cdbb0>]    lr : [<c15ce040>]    psr: 20000193
[    5.429687] sp : c31ce020  ip : ffffe000  fp : c31ce06c
[    5.434936] r10: 00003b9a  r9 : c31ce000  r8 : 00000000
[    5.440216] r7 : c2110e10  r6 : 00000665  r5 : 00000005  r4 : c31ce0c8
[    5.446777] r3 : c31ce000  r2 : 00000001  r1 : 2ca6c000  r0 : 00000665
[    5.453338] Flags: nzCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM
Segment none
[    5.460601] Control: 10c5387d  Table: 8020406a  DAC: 00000051
[    5.466369] Register r0 information: non-paged memory
[    5.471466] Register r1 information: non-paged memory
[    5.476531] Register r2 information: non-paged memory
[    5.481628] Register r3 information: non-slab/vmalloc memory
[    5.487335] Register r4 information: non-slab/vmalloc memory
[    5.493011] Register r5 information: non-paged memory
[    5.498107] Register r6 information: non-paged memory
[    5.503204] Register r7 information: non-slab/vmalloc memory
[    5.508880] Register r8 information: NULL pointer
[    5.513610] Register r9 information: non-slab/vmalloc memory
[    5.519317] Register r10 information: non-paged memory
[    5.524475] Register r11 information: non-slab/vmalloc memory
[    5.530273] Register r12 information: non-paged memory
[    5.535430] Process kworker/0:0H (pid: 8, stack limit = 0x(ptrval))
[    5.541748] Stack: (0xc31ce020 to 0xc31ce000)
[    5.546142] Backtrace:
...
[    7.896820] Code: e5942040 e3c3303f e3120080 e5932008 (e5927368)
[    7.902954] ---[ end trace 86f7fd8d70b6f6f9 ]---
[    7.907592] note: kworker/0:0H[8] exited with preempt_count 2
[    7.913360] ------------[ cut here ]------------
[    7.917999] WARNING: CPU: 0 PID: 8 at kernel/sched/core.c:9542
__might_sleep+0xa8/0xac
[    7.925994] do not call blocking ops when !TASK_RUNNING; state=402
set at [<(ptrval)>] worker_thread+0xb8/0x554
[    7.936126] Modules linked in:
[    7.939208] CPU: 0 PID: 8 Comm: kworker/0:0H Tainted: G      D
     5.15.78-rc1 #1
[    7.947265] Hardware name: Generic DRA74X (Flattened Device Tree)
[    7.953399] Backtrace:
...
[   28.471862] Code: bad PC value
[   28.474945] ---[ end trace 86f7fd8d70b6f700 ]---
[   28.479614] Fixing recursive fault but reboot is needed!

Test log link,
  https://lkft.validation.linaro.org/scheduler/job/5826464#L2710
  https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-5.15.y/build/v5.15.77-145-gf98185b81e48/testrun/12907651/suite/log-parser-test/test/check-kernel-oops/log
  https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-5.15.y/build/v5.15.77-145-gf98185b81e48/testrun/12907651/suite/log-parser-test/tests/

metadata:
  git_ref: linux-5.15.y
  git_repo: https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc
  git_sha: f98185b81e483128439a76d6e64217b606c09bed
  git_describe: v5.15.77-145-gf98185b81e48
  kernel_version: 5.15.78-rc1
  kernel-config: https://builds.tuxbuild.com/2HGeIzgM9yCQbFVPZR0ItTY7Nt4/config
  build-url: https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc/-/pipelines/688777444
  artifact-location: https://builds.tuxbuild.com/2HGeIzgM9yCQbFVPZR0ItTY7Nt4
  toolchain: gcc-10
  build_name: gcc-10-lkftconfig-kselftest-kernel

--
Linaro LKFT
https://lkft.linaro.org