Date
June 19, 2025, 12:07 p.m.
| Environment | |
|---|---|
| qemu-x86_64 |
[ 29.296873] ================================================================== [ 29.297423] BUG: KASAN: slab-out-of-bounds in memcmp+0x1b4/0x1d0 [ 29.297921] Read of size 1 at addr ffff8881024db9d8 by task kunit_try_catch/286 [ 29.298422] [ 29.298618] CPU: 1 UID: 0 PID: 286 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250619 #1 PREEMPT(voluntary) [ 29.298732] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.298757] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 29.298801] Call Trace: [ 29.298831] <TASK> [ 29.298873] dump_stack_lvl+0x73/0xb0 [ 29.298937] print_report+0xd1/0x650 [ 29.298984] ? __virt_addr_valid+0x1db/0x2d0 [ 29.299035] ? memcmp+0x1b4/0x1d0 [ 29.299074] ? kasan_complete_mode_report_info+0x2a/0x200 [ 29.299139] ? memcmp+0x1b4/0x1d0 [ 29.299177] kasan_report+0x141/0x180 [ 29.299223] ? memcmp+0x1b4/0x1d0 [ 29.299270] __asan_report_load1_noabort+0x18/0x20 [ 29.299322] memcmp+0x1b4/0x1d0 [ 29.299364] kasan_memcmp+0x18f/0x390 [ 29.299403] ? trace_hardirqs_on+0x37/0xe0 [ 29.299450] ? __pfx_kasan_memcmp+0x10/0x10 [ 29.299488] ? finish_task_switch.isra.0+0x153/0x700 [ 29.299531] ? __switch_to+0x47/0xf50 [ 29.299590] ? __pfx_read_tsc+0x10/0x10 [ 29.299633] ? ktime_get_ts64+0x86/0x230 [ 29.299689] kunit_try_run_case+0x1a5/0x480 [ 29.299744] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.299786] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 29.299830] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 29.299876] ? __kthread_parkme+0x82/0x180 [ 29.299914] ? preempt_count_sub+0x50/0x80 [ 29.299957] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.300007] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.300062] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 29.300156] kthread+0x337/0x6f0 [ 29.300203] ? trace_preempt_on+0x20/0xc0 [ 29.300257] ? __pfx_kthread+0x10/0x10 [ 29.300306] ? _raw_spin_unlock_irq+0x47/0x80 [ 29.300343] ? calculate_sigpending+0x7b/0xa0 [ 29.300370] ? __pfx_kthread+0x10/0x10 [ 29.300394] ret_from_fork+0x116/0x1d0 [ 29.300416] ? __pfx_kthread+0x10/0x10 [ 29.300438] ret_from_fork_asm+0x1a/0x30 [ 29.300471] </TASK> [ 29.300485] [ 29.308820] Allocated by task 286: [ 29.309188] kasan_save_stack+0x45/0x70 [ 29.309588] kasan_save_track+0x18/0x40 [ 29.310047] kasan_save_alloc_info+0x3b/0x50 [ 29.310354] __kasan_kmalloc+0xb7/0xc0 [ 29.310533] __kmalloc_cache_noprof+0x189/0x420 [ 29.310735] kasan_memcmp+0xb7/0x390 [ 29.311061] kunit_try_run_case+0x1a5/0x480 [ 29.311419] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.311815] kthread+0x337/0x6f0 [ 29.312155] ret_from_fork+0x116/0x1d0 [ 29.312431] ret_from_fork_asm+0x1a/0x30 [ 29.312707] [ 29.312848] The buggy address belongs to the object at ffff8881024db9c0 [ 29.312848] which belongs to the cache kmalloc-32 of size 32 [ 29.313445] The buggy address is located 0 bytes to the right of [ 29.313445] allocated 24-byte region [ffff8881024db9c0, ffff8881024db9d8) [ 29.314061] [ 29.314182] The buggy address belongs to the physical page: [ 29.314552] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1024db [ 29.314908] flags: 0x200000000000000(node=0|zone=2) [ 29.315221] page_type: f5(slab) [ 29.315487] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 29.315858] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 29.316275] page dumped because: kasan: bad access detected [ 29.316564] [ 29.316699] Memory state around the buggy address: [ 29.317015] ffff8881024db880: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 29.317271] ffff8881024db900: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 29.317531] >ffff8881024db980: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 29.317781] ^ [ 29.318009] ffff8881024dba00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.318504] ffff8881024dba80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.319065] ==================================================================