Date
July 3, 2025, 3:13 p.m.
| Environment | |
|---|---|
| qemu-x86_64 |
[ 13.069430] ================================================================== [ 13.069903] BUG: KASAN: slab-out-of-bounds in memcmp+0x1b4/0x1d0 [ 13.070118] Read of size 1 at addr ffff8881039f0b18 by task kunit_try_catch/276 [ 13.070368] [ 13.070935] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.15.5-rc1 #1 PREEMPT(voluntary) [ 13.070992] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.071007] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.071030] Call Trace: [ 13.071044] <TASK> [ 13.071062] dump_stack_lvl+0x73/0xb0 [ 13.071090] print_report+0xd1/0x650 [ 13.071116] ? __virt_addr_valid+0x1db/0x2d0 [ 13.071139] ? memcmp+0x1b4/0x1d0 [ 13.071158] ? kasan_complete_mode_report_info+0x2a/0x200 [ 13.071181] ? memcmp+0x1b4/0x1d0 [ 13.071202] kasan_report+0x141/0x180 [ 13.071226] ? memcmp+0x1b4/0x1d0 [ 13.071264] __asan_report_load1_noabort+0x18/0x20 [ 13.071286] memcmp+0x1b4/0x1d0 [ 13.071306] kasan_memcmp+0x18f/0x390 [ 13.071328] ? trace_hardirqs_on+0x37/0xe0 [ 13.071353] ? __pfx_kasan_memcmp+0x10/0x10 [ 13.071373] ? finish_task_switch.isra.0+0x153/0x700 [ 13.071398] ? __switch_to+0x5d9/0xf60 [ 13.071420] ? dequeue_task_fair+0x156/0x4e0 [ 13.071448] ? __pfx_read_tsc+0x10/0x10 [ 13.071468] ? ktime_get_ts64+0x86/0x230 [ 13.071494] kunit_try_run_case+0x1a5/0x480 [ 13.071520] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.071543] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.071567] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.071592] ? __kthread_parkme+0x82/0x180 [ 13.071614] ? preempt_count_sub+0x50/0x80 [ 13.071639] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.071663] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.071687] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.071710] kthread+0x337/0x6f0 [ 13.071727] ? trace_preempt_on+0x20/0xc0 [ 13.071750] ? __pfx_kthread+0x10/0x10 [ 13.071768] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.071790] ? calculate_sigpending+0x7b/0xa0 [ 13.071813] ? __pfx_kthread+0x10/0x10 [ 13.071831] ret_from_fork+0x41/0x80 [ 13.071852] ? __pfx_kthread+0x10/0x10 [ 13.071870] ret_from_fork_asm+0x1a/0x30 [ 13.071902] </TASK> [ 13.071913] [ 13.085796] Allocated by task 276: [ 13.085960] kasan_save_stack+0x45/0x70 [ 13.086116] kasan_save_track+0x18/0x40 [ 13.086262] kasan_save_alloc_info+0x3b/0x50 [ 13.086687] __kasan_kmalloc+0xb7/0xc0 [ 13.087078] __kmalloc_cache_noprof+0x189/0x420 [ 13.087640] kasan_memcmp+0xb7/0x390 [ 13.087995] kunit_try_run_case+0x1a5/0x480 [ 13.088437] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.089065] kthread+0x337/0x6f0 [ 13.089196] ret_from_fork+0x41/0x80 [ 13.089476] ret_from_fork_asm+0x1a/0x30 [ 13.089842] [ 13.090013] The buggy address belongs to the object at ffff8881039f0b00 [ 13.090013] which belongs to the cache kmalloc-32 of size 32 [ 13.091219] The buggy address is located 0 bytes to the right of [ 13.091219] allocated 24-byte region [ffff8881039f0b00, ffff8881039f0b18) [ 13.091983] [ 13.092063] The buggy address belongs to the physical page: [ 13.092250] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039f0 [ 13.093415] flags: 0x200000000000000(node=0|zone=2) [ 13.093972] page_type: f5(slab) [ 13.094405] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.095093] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.095872] page dumped because: kasan: bad access detected [ 13.096181] [ 13.096265] Memory state around the buggy address: [ 13.096584] ffff8881039f0a00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.097033] ffff8881039f0a80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.097728] >ffff8881039f0b00: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.098253] ^ [ 13.098698] ffff8881039f0b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.099096] ffff8881039f0c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.099476] ==================================================================