Date
June 23, 2025, 1:39 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 28.108023] ================================================================== [ 28.108295] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 28.108461] Read of size 1 at addr fff00000c7043110 by task kunit_try_catch/261 [ 28.108718] [ 28.108803] CPU: 0 UID: 0 PID: 261 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc1 #1 PREEMPT [ 28.109331] Tainted: [B]=BAD_PAGE, [N]=TEST [ 28.109518] Hardware name: linux,dummy-virt (DT) [ 28.110051] Call trace: [ 28.110127] show_stack+0x20/0x38 (C) [ 28.110265] dump_stack_lvl+0x8c/0xd0 [ 28.110411] print_report+0x118/0x608 [ 28.110535] kasan_report+0xdc/0x128 [ 28.110861] __asan_report_load1_noabort+0x20/0x30 [ 28.110996] strcmp+0xc0/0xc8 [ 28.111125] kasan_strings+0x340/0xb00 [ 28.111255] kunit_try_run_case+0x170/0x3f0 [ 28.111410] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.111545] kthread+0x328/0x630 [ 28.111685] ret_from_fork+0x10/0x20 [ 28.111820] [ 28.111898] Allocated by task 261: [ 28.111999] kasan_save_stack+0x3c/0x68 [ 28.112137] kasan_save_track+0x20/0x40 [ 28.112401] kasan_save_alloc_info+0x40/0x58 [ 28.112510] __kasan_kmalloc+0xd4/0xd8 [ 28.112786] __kmalloc_cache_noprof+0x16c/0x3c0 [ 28.112905] kasan_strings+0xc8/0xb00 [ 28.113106] kunit_try_run_case+0x170/0x3f0 [ 28.113235] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.113646] kthread+0x328/0x630 [ 28.113944] ret_from_fork+0x10/0x20 [ 28.114185] [ 28.114360] Freed by task 261: [ 28.114474] kasan_save_stack+0x3c/0x68 [ 28.114590] kasan_save_track+0x20/0x40 [ 28.114914] kasan_save_free_info+0x4c/0x78 [ 28.115203] __kasan_slab_free+0x6c/0x98 [ 28.115402] kfree+0x214/0x3c8 [ 28.115493] kasan_strings+0x24c/0xb00 [ 28.115607] kunit_try_run_case+0x170/0x3f0 [ 28.115727] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.115840] kthread+0x328/0x630 [ 28.115928] ret_from_fork+0x10/0x20 [ 28.116063] [ 28.116117] The buggy address belongs to the object at fff00000c7043100 [ 28.116117] which belongs to the cache kmalloc-32 of size 32 [ 28.116260] The buggy address is located 16 bytes inside of [ 28.116260] freed 32-byte region [fff00000c7043100, fff00000c7043120) [ 28.116807] [ 28.117084] The buggy address belongs to the physical page: [ 28.117256] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107043 [ 28.117498] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 28.117740] page_type: f5(slab) [ 28.117887] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 28.118264] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 28.118641] page dumped because: kasan: bad access detected [ 28.118877] [ 28.119043] Memory state around the buggy address: [ 28.119141] fff00000c7043000: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 28.119310] fff00000c7043080: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 28.119762] >fff00000c7043100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 28.120270] ^ [ 28.120556] fff00000c7043180: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 28.120804] fff00000c7043200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 28.120950] ==================================================================
[ 20.118589] ================================================================== [ 20.120461] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 20.121014] Read of size 1 at addr ffff88810a08ac10 by task kunit_try_catch/280 [ 20.122098] [ 20.122401] CPU: 1 UID: 0 PID: 280 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc1 #1 PREEMPT(voluntary) [ 20.122554] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.122595] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 20.122675] Call Trace: [ 20.122714] <TASK> [ 20.122758] dump_stack_lvl+0x73/0xb0 [ 20.122857] print_report+0xd1/0x650 [ 20.122962] ? __virt_addr_valid+0x1db/0x2d0 [ 20.123034] ? strcmp+0xb0/0xc0 [ 20.123094] ? kasan_complete_mode_report_info+0x64/0x200 [ 20.123153] ? strcmp+0xb0/0xc0 [ 20.123181] kasan_report+0x141/0x180 [ 20.123235] ? strcmp+0xb0/0xc0 [ 20.123290] __asan_report_load1_noabort+0x18/0x20 [ 20.123326] strcmp+0xb0/0xc0 [ 20.123356] kasan_strings+0x431/0xe80 [ 20.123387] ? trace_hardirqs_on+0x37/0xe0 [ 20.123422] ? __pfx_kasan_strings+0x10/0x10 [ 20.123452] ? finish_task_switch.isra.0+0x153/0x700 [ 20.123484] ? __switch_to+0x5d9/0xf60 [ 20.123512] ? dequeue_task_fair+0x166/0x4e0 [ 20.123544] ? __schedule+0x10cc/0x2b60 [ 20.123576] ? __pfx_read_tsc+0x10/0x10 [ 20.123627] ? ktime_get_ts64+0x86/0x230 [ 20.123670] kunit_try_run_case+0x1a5/0x480 [ 20.123710] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.123746] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 20.123782] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 20.123815] ? __kthread_parkme+0x82/0x180 [ 20.123847] ? preempt_count_sub+0x50/0x80 [ 20.123883] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.123919] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.123953] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 20.123987] kthread+0x337/0x6f0 [ 20.124010] ? trace_preempt_on+0x20/0xc0 [ 20.124043] ? __pfx_kthread+0x10/0x10 [ 20.124067] ? _raw_spin_unlock_irq+0x47/0x80 [ 20.124098] ? calculate_sigpending+0x7b/0xa0 [ 20.124130] ? __pfx_kthread+0x10/0x10 [ 20.124154] ret_from_fork+0x41/0x80 [ 20.124185] ? __pfx_kthread+0x10/0x10 [ 20.124211] ret_from_fork_asm+0x1a/0x30 [ 20.124281] </TASK> [ 20.124297] [ 20.141136] Allocated by task 280: [ 20.141579] kasan_save_stack+0x45/0x70 [ 20.141995] kasan_save_track+0x18/0x40 [ 20.142481] kasan_save_alloc_info+0x3b/0x50 [ 20.142863] __kasan_kmalloc+0xb7/0xc0 [ 20.143338] __kmalloc_cache_noprof+0x189/0x420 [ 20.143835] kasan_strings+0xc0/0xe80 [ 20.144164] kunit_try_run_case+0x1a5/0x480 [ 20.144720] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.145334] kthread+0x337/0x6f0 [ 20.145769] ret_from_fork+0x41/0x80 [ 20.146106] ret_from_fork_asm+0x1a/0x30 [ 20.146647] [ 20.146881] Freed by task 280: [ 20.147288] kasan_save_stack+0x45/0x70 [ 20.147758] kasan_save_track+0x18/0x40 [ 20.148101] kasan_save_free_info+0x3f/0x60 [ 20.148633] __kasan_slab_free+0x56/0x70 [ 20.149132] kfree+0x222/0x3f0 [ 20.149481] kasan_strings+0x2aa/0xe80 [ 20.149917] kunit_try_run_case+0x1a5/0x480 [ 20.150421] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.150896] kthread+0x337/0x6f0 [ 20.151306] ret_from_fork+0x41/0x80 [ 20.151749] ret_from_fork_asm+0x1a/0x30 [ 20.152131] [ 20.152438] The buggy address belongs to the object at ffff88810a08ac00 [ 20.152438] which belongs to the cache kmalloc-32 of size 32 [ 20.153379] The buggy address is located 16 bytes inside of [ 20.153379] freed 32-byte region [ffff88810a08ac00, ffff88810a08ac20) [ 20.154384] [ 20.154667] The buggy address belongs to the physical page: [ 20.155196] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10a08a [ 20.155906] flags: 0x200000000000000(node=0|zone=2) [ 20.156450] page_type: f5(slab) [ 20.156882] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 20.157544] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.158259] page dumped because: kasan: bad access detected [ 20.158766] [ 20.159007] Memory state around the buggy address: [ 20.159430] ffff88810a08ab00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.160178] ffff88810a08ab80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.161838] >ffff88810a08ac00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.162781] ^ [ 20.163179] ffff88810a08ac80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.163868] ffff88810a08ad00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.164485] ==================================================================