Date
June 17, 2025, 3:40 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 24.630133] ================================================================== [ 24.630489] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 24.632042] Read of size 1 at addr fff00000c73a8610 by task kunit_try_catch/261 [ 24.632279] [ 24.632371] CPU: 0 UID: 0 PID: 261 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT [ 24.632567] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.632630] Hardware name: linux,dummy-virt (DT) [ 24.632697] Call trace: [ 24.632762] show_stack+0x20/0x38 (C) [ 24.632896] dump_stack_lvl+0x8c/0xd0 [ 24.633002] print_report+0x118/0x608 [ 24.633104] kasan_report+0xdc/0x128 [ 24.633192] __asan_report_load1_noabort+0x20/0x30 [ 24.633288] strcmp+0xc0/0xc8 [ 24.633377] kasan_strings+0x340/0xb00 [ 24.633484] kunit_try_run_case+0x170/0x3f0 [ 24.633580] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.633684] kthread+0x328/0x630 [ 24.635878] ret_from_fork+0x10/0x20 [ 24.636000] [ 24.636044] Allocated by task 261: [ 24.636147] kasan_save_stack+0x3c/0x68 [ 24.636236] kasan_save_track+0x20/0x40 [ 24.636323] kasan_save_alloc_info+0x40/0x58 [ 24.636412] __kasan_kmalloc+0xd4/0xd8 [ 24.636496] __kmalloc_cache_noprof+0x16c/0x3c0 [ 24.636589] kasan_strings+0xc8/0xb00 [ 24.636667] kunit_try_run_case+0x170/0x3f0 [ 24.636777] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.636886] kthread+0x328/0x630 [ 24.636972] ret_from_fork+0x10/0x20 [ 24.637052] [ 24.637098] Freed by task 261: [ 24.637163] kasan_save_stack+0x3c/0x68 [ 24.637253] kasan_save_track+0x20/0x40 [ 24.637335] kasan_save_free_info+0x4c/0x78 [ 24.637435] __kasan_slab_free+0x6c/0x98 [ 24.637524] kfree+0x214/0x3c8 [ 24.637598] kasan_strings+0x24c/0xb00 [ 24.637686] kunit_try_run_case+0x170/0x3f0 [ 24.639138] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.639277] kthread+0x328/0x630 [ 24.639371] ret_from_fork+0x10/0x20 [ 24.639503] [ 24.639552] The buggy address belongs to the object at fff00000c73a8600 [ 24.639552] which belongs to the cache kmalloc-32 of size 32 [ 24.639698] The buggy address is located 16 bytes inside of [ 24.639698] freed 32-byte region [fff00000c73a8600, fff00000c73a8620) [ 24.639945] [ 24.640024] The buggy address belongs to the physical page: [ 24.640148] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1073a8 [ 24.640344] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 24.640522] page_type: f5(slab) [ 24.640661] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 24.640802] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 24.640883] page dumped because: kasan: bad access detected [ 24.640951] [ 24.640989] Memory state around the buggy address: [ 24.641070] fff00000c73a8500: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 24.641226] fff00000c73a8580: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 24.641331] >fff00000c73a8600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 24.641414] ^ [ 24.641484] fff00000c73a8680: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 24.641578] fff00000c73a8700: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 24.641671] ==================================================================
[ 22.356087] ================================================================== [ 22.357645] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 22.358681] Read of size 1 at addr ffff888102ef0050 by task kunit_try_catch/279 [ 22.359850] [ 22.360099] CPU: 1 UID: 0 PID: 279 Comm: kunit_try_catch Tainted: G B N 6.15.3-rc1 #1 PREEMPT(voluntary) [ 22.360566] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.360638] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.360705] Call Trace: [ 22.360745] <TASK> [ 22.360829] dump_stack_lvl+0x73/0xb0 [ 22.360961] print_report+0xd1/0x650 [ 22.361066] ? __virt_addr_valid+0x1db/0x2d0 [ 22.361145] ? strcmp+0xb0/0xc0 [ 22.361208] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.361281] ? strcmp+0xb0/0xc0 [ 22.361365] kasan_report+0x141/0x180 [ 22.361440] ? strcmp+0xb0/0xc0 [ 22.361631] __asan_report_load1_noabort+0x18/0x20 [ 22.361672] strcmp+0xb0/0xc0 [ 22.361704] kasan_strings+0x431/0xe80 [ 22.361741] ? trace_hardirqs_on+0x37/0xe0 [ 22.361780] ? __pfx_kasan_strings+0x10/0x10 [ 22.361813] ? finish_task_switch.isra.0+0x153/0x700 [ 22.361850] ? __switch_to+0x5d9/0xf60 [ 22.361881] ? dequeue_task_fair+0x166/0x4e0 [ 22.361918] ? __schedule+0x10cc/0x2b60 [ 22.362015] ? __pfx_read_tsc+0x10/0x10 [ 22.362097] ? ktime_get_ts64+0x86/0x230 [ 22.362169] kunit_try_run_case+0x1a5/0x480 [ 22.362215] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.362250] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.362311] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.362353] ? __kthread_parkme+0x82/0x180 [ 22.362390] ? preempt_count_sub+0x50/0x80 [ 22.362426] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.362464] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.362500] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.362537] kthread+0x337/0x6f0 [ 22.362563] ? trace_preempt_on+0x20/0xc0 [ 22.362599] ? __pfx_kthread+0x10/0x10 [ 22.362630] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.362664] ? calculate_sigpending+0x7b/0xa0 [ 22.362700] ? __pfx_kthread+0x10/0x10 [ 22.362728] ret_from_fork+0x41/0x80 [ 22.362764] ? __pfx_kthread+0x10/0x10 [ 22.362792] ret_from_fork_asm+0x1a/0x30 [ 22.362840] </TASK> [ 22.362855] [ 22.385844] Allocated by task 279: [ 22.386820] kasan_save_stack+0x45/0x70 [ 22.387429] kasan_save_track+0x18/0x40 [ 22.387871] kasan_save_alloc_info+0x3b/0x50 [ 22.388522] __kasan_kmalloc+0xb7/0xc0 [ 22.388936] __kmalloc_cache_noprof+0x189/0x420 [ 22.389488] kasan_strings+0xc0/0xe80 [ 22.389894] kunit_try_run_case+0x1a5/0x480 [ 22.391038] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.391459] kthread+0x337/0x6f0 [ 22.392115] ret_from_fork+0x41/0x80 [ 22.392574] ret_from_fork_asm+0x1a/0x30 [ 22.393019] [ 22.393374] Freed by task 279: [ 22.393761] kasan_save_stack+0x45/0x70 [ 22.394223] kasan_save_track+0x18/0x40 [ 22.395088] kasan_save_free_info+0x3f/0x60 [ 22.395819] __kasan_slab_free+0x56/0x70 [ 22.396154] kfree+0x222/0x3f0 [ 22.396534] kasan_strings+0x2aa/0xe80 [ 22.396938] kunit_try_run_case+0x1a5/0x480 [ 22.397618] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.398005] kthread+0x337/0x6f0 [ 22.398411] ret_from_fork+0x41/0x80 [ 22.399369] ret_from_fork_asm+0x1a/0x30 [ 22.399812] [ 22.400086] The buggy address belongs to the object at ffff888102ef0040 [ 22.400086] which belongs to the cache kmalloc-32 of size 32 [ 22.401031] The buggy address is located 16 bytes inside of [ 22.401031] freed 32-byte region [ffff888102ef0040, ffff888102ef0060) [ 22.402078] [ 22.402273] The buggy address belongs to the physical page: [ 22.402985] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102ef0 [ 22.404472] flags: 0x200000000000000(node=0|zone=2) [ 22.405212] page_type: f5(slab) [ 22.405567] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 22.406339] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 22.406942] page dumped because: kasan: bad access detected [ 22.407830] [ 22.408102] Memory state around the buggy address: [ 22.408543] ffff888102eeff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.409565] ffff888102eeff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.410464] >ffff888102ef0000: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 22.410991] ^ [ 22.411562] ffff888102ef0080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 22.412854] ffff888102ef0100: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 22.413727] ==================================================================