Following kernel BUG reported while running kunit drm_framebuffer tests
on Linux mainline 6.1.0-rc1.
Started happening from Linux next 6.0.0-rc1-next-20220818.
Stared happening on Linux mainline from
git_sha: 833477fce7a14d43ae4c07f8ddc32fa5119471a2
Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
Crash log:
[ 38.366527] ok 39 - drm_framebuffer
[ 38.367919] # Subtest: drm_buddy
[ 38.367921] 1..6
[ 38.368686] ------------[ cut here ]------------
[ 38.370089] kernel BUG at drivers/gpu/drm/drm_buddy.c:140!
[ 38.371111] invalid opcode: 0000 [#1] PREEMPT SMP
[ 38.372003] CPU: 1 PID: 654 Comm: kunit_try_catch Tainted: G B
N 6.1.0-rc1 #1
[ 38.373486] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 38.374972] EIP: drm_buddy_init+0x2c0/0x340
[ 38.375767] Code: 21 29 c1 83 f9 33 0f 86 27 ff ff ff 8d b4 26 00
00 00 00 8d b4 26 00 00 00 00 0f 0b 8d b6 00 00 00 00 0f 0b 8d b6 00
00 00 00 <0f> 0b 8d b6 00 00 00 00 0f bd 45 0c 0f 44 c1 83 c0 21 e9 e0
fd ff
[ 38.379066] EAX: c1379898 EBX: c1aaf0a0 ECX: c1aaf090 EDX: c1aaf0b8
[ 38.380196] ESI: 00000034 EDI: c2bcff20 EBP: c2bcfebc ESP: c2bcfe8c
[ 38.381308] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010297
[ 38.382507] CR0: 80050033 CR2: f4f5e000 CR3: 0f947000 CR4: 003506d0
[ 38.383659] DR0: cf9aada4 DR1: cf9aada9 DR2: cf9aadaa DR3: cf9aadab
[ 38.384760] DR6: ffff0ff0 DR7: 00000600
[ 38.385441] Call Trace:
[ 38.385909] drm_test_buddy_alloc_limit+0x47/0x3c0
[ 38.386772] ? __switch_to_asm+0x8f/0xf0
[ 38.387488] ? __switch_to_asm+0x89/0xf0
[ 38.388192] ? __switch_to_asm+0x83/0xf0
[ 38.388903] ? finish_task_switch+0x80/0x2b0
[ 38.389670] ? __schedule+0x2dc/0xac0
[ 38.390325] ? trace_hardirqs_on+0x36/0xf0
[ 38.391066] ? finish_task_switch+0x80/0x2b0
[ 38.391848] ? __switch_to+0x18/0x1e0
[ 38.392505] ? drm_buddy_init_test+0x25/0x40
[ 38.393287] ? get_random_u32+0x8f/0xf0
[ 38.393991] ? drm_buddy_init_test+0x25/0x40
[ 38.394775] kunit_try_run_case+0x52/0x80
[ 38.395524] ? trace_hardirqs_on+0x36/0xf0
[ 38.396259] kunit_generic_run_threadfn_adapter+0x16/0x20
[ 38.397231] kthread+0xe0/0x110
[ 38.397820] ? kunit_try_catch_throw+0x20/0x20
[ 38.398620] ? kthread_complete_and_exit+0x20/0x20
[ 38.399503] ret_from_fork+0x1c/0x28
[ 38.400174] Modules linked in:
[ 38.400781] ---[ end trace 0000000000000000 ]---
[ 38.401623] EIP: drm_buddy_init+0x2c0/0x340
[ 38.402374] Code: 21 29 c1 83 f9 33 0f 86 27 ff ff ff 8d b4 26 00
00 00 00 8d b4 26 00 00 00 00 0f 0b 8d b6 00 00 00 00 0f 0b 8d b6 00
00 00 00 <0f> 0b 8d b6 00 00 00 00 0f bd 45 0c 0f 44 c1 83 c0 21 e9 e0
fd ff
[ 38.405711] EAX: c1379898 EBX: c1aaf0a0 ECX: c1aaf090 EDX: c1aaf0b8
[ 38.406830] ESI: 00000034 EDI: c2bcff20 EBP: c2bcfebc ESP: c2bcfe8c
[ 38.407976] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010297
[ 38.409186] CR0: 80050033 CR2: f4f5e000 CR3: 0f947000 CR4: 003506d0
login-action: exception
[login-action] Waiting for messages, (timeout 00:09:56)
[ 38.410313] DR0: cf9aada4 DR1: cf9aada9 DR2: cf9aadaa DR3: cf9aadab
[ 38.411481] DR6: ffff0ff0 DR7: 00000600
[ 365.847635] # drm_test_buddy_alloc_limit: try timed out
[ 365.848890] ------------[ cut here ]------------
[ 365.849823] refcount_t: addition on 0; use-after-free.
[ 365.850822] WARNING: CPU: 3 PID: 1 at lib/refcount.c:25
refcount_warn_saturate+0x84/0x120
[ 365.852421] Modules linked in:
[ 365.853055] CPU: 3 PID: 1 Comm: swapper/0 Tainted: G B D
N 6.1.0-rc1 #1
[ 365.854612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 365.856032] EIP: refcount_warn_saturate+0x84/0x120
[ 365.856931] Code: cf e8 bb 9a a1 00 0f 0b eb cf 8d 74 26 00 80 3d
54 c7 7d cf 00 75 c2 c7 04 24 90 41 43 cf b0 01 a2 54 c7 7d cf e8 97
9a a1 00 <0f> 0b eb ab 8d b4 26 00 00 00 00 90 80 3d 56 c7 7d cf 00 75
9a c7
[ 365.860283] EAX: 0000002a EBX: c23a0000 ECX: ce17a1d2 EDX: 00000000
[ 365.861373] ESI: c23a0018 EDI: c23a0000 EBP: c11cdc90 ESP: c11cdc8c
[ 365.862567] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010296
[ 365.863917] CR0: 80050033 CR2: 00000000 CR3: 0f947000 CR4: 003506d0
[ 365.865113] DR0: cf9aadac DR1: cf9aadad DR2: cf9aadae DR3: cf9aadaf
[ 365.866330] DR6: ffff0ff0 DR7: 00000600
[ 365.867157] Call Trace:
[ 365.867736] kthread_stop+0x184/0x190
[ 365.868480] kunit_try_catch_run.cold+0x7b/0xc1
[ 365.869373] kunit_run_case_catch_errors+0x6e/0xa8
[ 365.870394] kunit_run_tests.cold+0x1c4/0x5fe
[ 365.871218] ? kunit_catch_run_case+0x50/0x50
[ 365.872153] ? kunit_module_notify+0x90/0x90
[ 365.872945] ? up_write+0x37/0x70
[ 365.873565] ? preempt_count_sub+0xc1/0x110
[ 365.874356] ? preempt_count_add+0x6c/0xd0
[ 365.875120] ? up_write+0x37/0x70
[ 365.875723] ? __debugfs_create_file+0xdb/0x1a0
[ 365.876625] ? up_write+0x37/0x70
[ 365.877264] ? debugfs_create_file+0x3c/0x50
[ 365.878134] ? kunit_debugfs_create_suite+0x90/0xa0
[ 365.879046] __kunit_test_suites_init+0x52/0x70
[ 365.879873] kunit_run_all_tests.cold+0xeb/0x170
[ 365.880730] ? kernel_init_freeable+0x1d0/0x209
[ 365.881702] kernel_init_freeable+0x1d5/0x209
[ 365.882568] ? rest_init+0xc0/0xc0
[ 365.883240] kernel_init+0x1a/0x110
[ 365.883950] ? schedule_tail_wrapper+0x9/0xc
[ 365.884756] ret_from_fork+0x1c/0x28
[ 365.885431] ---[ end trace 0000000000000000 ]---
[ 365.886320] BUG: kernel NULL pointer dereference, address: 00000000
[ 365.887443] #PF: supervisor write access in kernel mode
login-action: exception
[login-action] Waiting for messages, (timeout 00:09:56)
[ 365.888395] #PF: error_code(0x0002) - not-present page
[ 365.889329] *pde = 00000000
[ 365.889883] Oops: 0002 [#2] PREEMPT SMP
[ 365.890599] CPU: 3 PID: 1 Comm: swapper/0 Tainted: G B D W
N 6.1.0-rc1 #1
[ 365.891980] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.12.0-1 04/01/2014
[ 365.893510] EIP: kthread_stop+0x42/0x190
[ 365.894236] Code: 00 00 f0 0f c1 43 18 85 c0 0f 84 51 01 00 00 8d
50 01 09 c2 0f 88 fe 00 00 00 f6 43 1e 20 0f 84 14 01 00 00 8b bb 2c
04 00 00 <f0> 80 0f 02 89 d8 e8 83 f7 ff ff f0 80 4b 02 02 89 d8 e8 b7
2e 01
[ 365.897721] EAX: 0000002a EBX: c23a0000 ECX: ce17a1d2 EDX: 00000000
[ 365.898816] ESI: c23a0018 EDI: 00000000 EBP: c11cdca4 ESP: c11cdc98
[ 365.899951] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010202
[ 365.901188] CR0: 80050033 CR2: 00000000 CR3: 0f947000 CR4: 003506d0
[ 365.902360] DR0: cf9aadac DR1: cf9aadad DR2: cf9aadae DR3: cf9aadaf
[ 365.903457] DR6: ffff0ff0 DR7: 00000600
[ 365.904164] Call Trace:
[ 365.904650] kunit_try_catch_run.cold+0x7b/0xc1
[ 365.905538] kunit_run_case_catch_errors+0x6e/0xa8
[ 365.906471] kunit_run_tests.cold+0x1c4/0x5fe
[ 365.907297] ? kunit_catch_run_case+0x50/0x50
[ 365.908127] ? kunit_module_notify+0x90/0x90
[ 365.908935] ? up_write+0x37/0x70
[ 365.909565] ? preempt_count_sub+0xc1/0x110
[ 365.910336] ? preempt_count_add+0x6c/0xd0
[ 365.911094] ? up_write+0x37/0x70
[ 365.911763] ? __debugfs_create_file+0xdb/0x1a0
[ 365.912657] ? up_write+0x37/0x70
[ 365.913274] ? debugfs_create_file+0x3c/0x50
[ 365.914963] ? kunit_debugfs_create_suite+0x90/0xa0
[ 365.916691] __kunit_test_suites_init+0x52/0x70
[ 365.918568] kunit_run_all_tests.cold+0xeb/0x170
[ 365.919874] ? kernel_init_freeable+0x1d0/0x209
[ 365.922279] kernel_init_freeable+0x1d5/0x209
[ 365.923195] ? rest_init+0xc0/0xc0
[ 365.923922] kernel_init+0x1a/0x110
[ 365.924720] ? schedule_tail_wrapper+0x9/0xc
[ 365.925416] ret_from_fork+0x1c/0x28
[ 365.926043] Modules linked in:
[ 365.926558] CR2: 0000000000000000
[ 365.927137] ---[ end trace 0000000000000000 ]---
[ 365.927898] EIP: drm_buddy_init+0x2c0/0x340
[ 365.928623] Code: 21 29 c1 83 f9 33 0f 86 27 ff ff ff 8d b4 26 00
00 00 00 8d b4 26 00 00 00 00 0f 0b 8d b6 00 00 00 00 0f 0b 8d b6 00
00 00 00 <0f> 0b 8d b6 00 00 00 00 0f bd 45 0c 0f 44 c1 83 c0 21 e9 e0
fd ff
[ 365.932581] EAX: c1379898 EBX: c1aaf0a0 ECX: c1aaf090 EDX: c1aaf0b8
[ 365.933606] ESI: 00000034 EDI: c2bcff20 EBP: c2bcfebc ESP: c2bcfe8c
[ 365.934846] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010297
[ 365.936612] CR0: 80050033 CR2: 00000000 CR3: 0f947000 CR4: 003506d0
[ 365.938215] DR0: cf9aadac DR1: cf9aadad DR2: cf9aadae DR3: cf9aadaf
[ 365.939499] DR6: ffff0ff0 DR7: 00000600
[ 365.940268] Kernel panic - not syncing: Attempted to kill init!
exitcode=0x00000009
[ 365.941729] Kernel Offset: disabled
URL:
[1] https://lkft.validation.linaro.org/scheduler/job/5689216#L2230
[2] https://lkft.validation.linaro.org/scheduler/job/5633224#L217
metadata:
git_ref: master
git_repo: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline
git_sha: 9abf2313adc1ca1b6180c508c25f22f9395cc780
git_describe: v6.1-rc1
kernel_version: 6.1.0-rc1
kernel-config: https://builds.tuxbuild.com/2GEkhTdtJyiEiwjlnDNtueheTdH/config
build-url: https://gitlab.com/Linaro/lkft/mirrors/torvalds/linux-mainline/-/pipelines/668166832
artifact-location: https://builds.tuxbuild.com/2GEkhTdtJyiEiwjlnDNtueheTdH
toolchain: gcc-11
System.map: https://builds.tuxbuild.com/2GEkhTdtJyiEiwjlnDNtueheTdH/System.map
vmlinux.xz: https://builds.tuxbuild.com/2GEkhTdtJyiEiwjlnDNtueheTdH/vmlinux.xz
--
Linaro LKFT
https://lkft.linaro.org
