While booting linux next 20220203 on qemu-arm the following kernel crash was noticed with

CONFIG_KASAN=y

Reported-by: Linux Kernel Functional Testing lkft@linaro.org

metadata: git branch: master git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next git commit: 2d3d8c7643a56bfe2e808f97d5a4360d49f3b45b git describe: next-20220203 make_kernelversion: 5.17.0-rc2 kernel-config: https://builds.tuxbuild.com/24aNqQLzNsoEZKVK35BoE32uqLM/config

# crash log Failed to start Load Kernel Modules. See 'systemctl status systemd-modules-load.service' for details. Starting Apply Kernel Variables... Mounting Kernel Configuration File System... [ 3.383096] EXT4-fs (vda): re-mounted. Quota mode: disabled. [ 3.434068] 8<--- cut here --- [ 3.435503] Unable to handle kernel NULL pointer dereference at virtual address 00000002 [ 3.439760] [00000002] *pgd=00000000 [ 3.441612] Internal error: Oops: 5 [#1] SMP ARM [ 3.443779] Modules linked in: [ 3.445175] CPU: 0 PID: 157 Comm: systemd-journal Not tainted 5.17.0-rc2-next-20220203 #1 [ 3.449337] Hardware name: Generic DT based system [ 3.452222] PC is at __read_once_word_nocheck+0x0/0x8 [ 3.453068] 8<--- cut here --- [ 3.455077] LR is at unwind_frame+0x64c/0xa70 [ 3.456562] Unable to handle kernel NULL pointer dereference at virtual address 00000002 [ 3.459046] pc : [<c0313ffc>] lr : [<c03147f8>] psr: 600d0013 [ 3.459068] sp : c73e39e8 ip : c34d61e0 fp : 00000000 [ 3.459087] r10: c73e3a70 r9 : 00000000 r8 : c73e3b00 [ 3.459108] r7 : 809b47af r6 : c28fa258 r5 : 00000002 r4 : 00000022 [ 3.462628] [00000002] *pgd=00000000 [ 3.466034] r3 : 00000022 r2 : 00000007 r1 : 00000000 r0 : 00000002 [ 3.468728] [ 3.471490] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 3.484888] Control: 10c5383d Table: 4764c06a DAC: 00000051 [ 3.488137] Register r0 information: non-paged memory [ 3.491155] Register r1 information: NULL pointer [ 3.493582] Register r2 information: non-paged memory [ 3.496629] Register r3 information: non-paged memory [ 3.499303] Register r4 information: non-paged memory [ 3.502290] Register r5 information: non-paged memory [ 3.504797] Register r6 information: non-slab/vmalloc memory [ 3.507951] Register r7 information: non-paged memory [ 3.510684] Register r8 information: non-slab/vmalloc memory [ 3.513940] Register r9 information: NULL pointer [ 3.516434] Register r10 information: non-slab/vmalloc memory [ 3.519805] Register r11 information: NULL pointer [ 3.522486] Register r12 information: non-slab/vmalloc memory [ 3.525701] Process systemd-journal (pid: 157, stack limit = 0x(ptrval)) [ 3.529238] Stack: (0xc73e39e8 to 0xc73e4000) [ 3.531416] 39e0: c4084bb8 c73e3cb0 00000001 c59c5e80 c34d61e0 00004000 [ 3.536285] 3a00: 00000002 c73e3b40 c73e3b4c c73e3b44 b7e7c748 c59c5e80 c73e3b48 c28fa258 [ 3.540834] 3a20: 00000003 00000022 c73e3d90 c73e3ba0 c59c5e80 c0385928 c040c734 c288f4e0 [ 3.545456] 3a40: 41b58ab3 c2772e74 c03141ac c59c65e4 c415dc90 c0570d00 c34d61e0 c73e4000 [ 3.549942] 3a60: c73e3c28 c73e3ba0 c73e3bac c73e3ba4 e82aaa80 c5762030 c5762000 c59c7380 [ 3.554343] 3a80: c6582a00 00000000 00000000 00000022 c4084cd0 00000002 c0394274 00000000 [ 3.558939] 3aa0: 41b58ab3 c2772e74 c03141ac 00000064 000d000d 0000000e 000d000d 0000000d [ 3.563299] 3ac0: 0000000d c08c9c9c c4084c80 c4084cd0 00000001 c59c5e80 c098f0ac 00000cc0 [ 3.567948] 3ae0: 00000000 c05610b4 c73e3bc0 c73e3bc4 c8d2b708 c73e3c28 c73e3d90 c73e3d90 [ 3.572250] 3b00: 00000000 3d17bd2a c8d2b700 c59c5e80 b7e7c770 c59c5e80 00000000 c0394274 [ 3.576874] 3b20: c5762000 c288f4e0 c73e3b64 c030da48 00000103 c73e3ba0 00000000 00000000 [ 3.581392] 3b40: 00000022 c73e3d68 c0394274 c0394274 c73e3d38 3d17bd2a 00000000 c73e3be0 [ 3.585961] 3b60: c73e3db4 c040c734 c03cd130 c59c5e80 b7e7c77c c59c5e80 00000000 c0535938 [ 3.590620] 3b80: 41b58ab3 c2784b1c c040c6b0 c030da48 c73e3cc0 c73e3c00 00000000 00000000 [ 3.594827] 3ba0: 00000005 00000040 c73e3c00 00000001 c73e3b90 3d17bd2a 00600004 c73e3c40 [ 3.599437] 3bc0: c412c938 c040c734 c03141ac c6427f84 00000001 3d17bd2a c0552084 3d17bd2a [ 3.603873] 3be0: c7653000 3d17bd2a c388eb80 c5762004 00000800 00000000 00000000 c0518a34 [ 3.608502] 3c00: c04f13c4 c04cb360 c0518e38 c05175a0 c0394274 00000001 00000000 c59c5e80 [ 3.613124] 3c20: b7e7c788 c388ec00 c73e3ca0 c0570d00 00000000 3d17bd2a 00000000 c8e74404 [ 3.617461] 3c40: 41b58ab3 c278184c c03a784c c044e998 c8e74400 c288f4e0 c412c938 c04f13c4 [ 3.622051] 3c60: 00000000 eff49240 e82ae5f8 25707000 00020d78 600f0093 c59c6154 c04f13c4 [ 3.626495] 3c80: 00000002 ee5d5774 e82ae5ac 25707000 00020d78 00000000 eff49260 00000000 [ 3.631247] 3ca0: 41b58ab3 c278c79c c04f1260 00000000 c3541780 c356f9e0 00000004 00000000 [ 3.635850] 3cc0: 00000000 c0518b08 ee5d5c80 00000002 00000004 c04efd50 ffc00000 00000000 [ 3.640440] 3ce0: 00000000 ee5d5c80 00000002 c3541780 00000022 c04cb360 c5762000 c3840400 [ 3.645112] 3d00: ee5bd9c8 c5762000 c3840400 c051a320 c5762000 c0518e38 c5762000 c3840400 [ 3.649694] 3d20: c0394274 000c49c8 ee5bd9c8 c3541240 c288f4e0 c05175a0 c1945ec0 00000000 [ 3.654103] 3d40: 00000000 c0352894 e82aaa80 c5762030 c5762000 c59c7380 c6582a00 00000000 [ 3.658541] 3d60: 00000000 c0394274 c3840900 c051a320 c8e74400 c0518e38 c8e74400 25707000 [ 3.662916] 3d80: 00000080 c5762000 c59c7380 c59c5e80 ffffffff c2ba0044 c388e900 c59c5e80 [ 3.667693] 3da0: 25707000 c6582a00 00000000 c59c5e80 c73e3e9c c18217a0 c8d2b700 00000020 [ 3.672253] 3dc0: c4084c80 c0535938 00000000 c1822120 25707000 c2ba3a80 00000000 00000000 [ 3.676873] 3de0: c59c6098 c59c5e88 b7e7c7c0 00000000 c73e3e60 e82ab0ac c73e3e60 c35110e0 [ 3.681265] 3e00: 41b58ab3 c27811ac c1821204 c0996fe0 c2c669c0 b7e7c7c8 c73e3ea0 c59c5e80 [ 3.685720] 3e20: 41b58ab3 00000000 c08c1660 00000000 00000000 c051a0dc c2ce47c0 c424bf40 [ 3.690320] 3e40: 41b58ab3 c2780f04 c03904d4 c6427f90 00200004 c052cb64 00000011 c8e74400 [ 3.694985] 3e60: 3d17bd2a 00000000 b7e7c7d8 c73e3f30 c59c5e80 3d17bd2a 005009c9 c59c5e80 [ 3.699645] 3e80: c59c60a4 c03002c4 00000002 5ac3c35a c59c5e80 c73e3fb0 c73e3eac c1822120 [ 3.704065] 3ea0: c59c5e80 c73e3ff0 b7e7c7dc c030d1c0 c73e3f80 c59c662c 5ac3c35a 00000000 [ 3.708666] 3ec0: 41b58ab3 c278fa34 c0535ee8 c73e3f80 c73e3f40 00000000 ffffff9c c0532cc0 [ 3.713135] 3ee0: 41b58ab3 c27725c0 c030d124 00000000 00000000 00000000 c7690840 b7e7c7e4 [ 3.717788] 3f00: 41b58ab3 c279002c c0541f58 00000000 00000000 00000000 00000000 00000000 [ 3.722331] 3f20: 00288000 00000000 00000000 00000000 00000000 00000000 c3510ba0 c03923e0 [ 3.726739] 3f40: c642b010 c424bed8 c8d2b400 c59c5e80 c3510ba0 00000001 b68cc4ec c03855cc [ 3.731331] 3f60: c8d2b400 c59c5e80 00000001 00000006 c03002c4 c59c5e80 00000006 3d17bd2a [ 3.735933] 3f80: c8d2b400 3d17bd2a b68cb4f0 004fc3f4 005009c8 005009c9 00000142 c03002c4 [ 3.740521] 3fa0: c59c5e80 00000142 b68ca36c c030012c 00000011 005009c9 002a8000 00000000 [ 3.744964] 3fc0: 004fc3f4 005009c8 005009c9 00000142 00000000 00000000 00000010 b68ca36c [ 3.749357] 3fe0: 00000000 b68ca210 aeb3b000 aeabda08 600f0010 00000010 00000000 00000000 [ 3.753837] __read_once_word_nocheck from unwind_frame+0x64c/0xa70 [ 3.757514] unwind_frame from __save_stack_trace+0x70/0x94 [ 3.760647] __save_stack_trace from stack_trace_save+0x84/0xac [ 3.763890] stack_trace_save from kasan_set_track+0x2c/0x4c [ 3.767299] kasan_set_track from kasan_set_free_info+0x20/0x34 [ 3.770511] kasan_set_free_info from __kasan_slab_free+0xf8/0x12c [ 3.773754] __kasan_slab_free from kmem_cache_free+0xb0/0x45c [ 3.777330] kmem_cache_free from finish_task_switch+0x22c/0x3b4 [ 3.780783] finish_task_switch from __schedule+0x59c/0xeb4 [ 3.783925] __schedule from schedule+0x68/0xe0 [ 3.786596] schedule from do_work_pending+0x9c/0x6f8 [ 3.789592] do_work_pending from slow_work_pending+0xc/0x20 [ 3.792690] Code: e8bd8070 eec11e10 e3a00000 e12fff1e (e5900000) [ 3.795729] Internal error: Oops: 5 [#2] SMP ARM [ 3.795842] ---[ end trace 0000000000000000 ]--- [ 3.798610] Modules linked in:

full test log link, https://lkft.validation.linaro.org/scheduler/job/4461318#L535