Date
June 17, 2025, 3:39 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 94.738178] ================================================================== [ 94.739040] BUG: KASAN: slab-use-after-free in strcmp+0x2c/0x78 [ 94.740123] Read of size 1 at addr ffff0000c60910d0 by task kunit_try_catch/205 [ 94.741505] [ 94.741977] CPU: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.6.94-rc1 #1 [ 94.743277] Hardware name: linux,dummy-virt (DT) [ 94.744095] Call trace: [ 94.744862] dump_backtrace+0x9c/0x128 [ 94.745606] show_stack+0x20/0x38 [ 94.746329] dump_stack_lvl+0x60/0xb0 [ 94.748385] print_report+0xf8/0x5e8 [ 94.749236] kasan_report+0xdc/0x128 [ 94.750030] __asan_load1+0x60/0x70 [ 94.750848] strcmp+0x2c/0x78 [ 94.751964] kasan_strings+0x12c/0x478 [ 94.752683] kunit_try_run_case+0x114/0x298 [ 94.753588] kunit_generic_run_threadfn_adapter+0x38/0x60 [ 94.754582] kthread+0x18c/0x1a8 [ 94.755276] ret_from_fork+0x10/0x20 [ 94.756135] [ 94.756525] Allocated by task 205: [ 94.757186] kasan_save_stack+0x3c/0x68 [ 94.758878] kasan_set_track+0x2c/0x40 [ 94.759724] kasan_save_alloc_info+0x24/0x38 [ 94.760571] __kasan_kmalloc+0xd4/0xd8 [ 94.761690] kmalloc_trace+0x68/0x130 [ 94.762431] kasan_strings+0xa0/0x478 [ 94.763167] kunit_try_run_case+0x114/0x298 [ 94.764102] kunit_generic_run_threadfn_adapter+0x38/0x60 [ 94.765139] kthread+0x18c/0x1a8 [ 94.766427] ret_from_fork+0x10/0x20 [ 94.767586] [ 94.767960] Freed by task 205: [ 94.768639] kasan_save_stack+0x3c/0x68 [ 94.769544] kasan_set_track+0x2c/0x40 [ 94.770302] kasan_save_free_info+0x38/0x60 [ 94.771113] __kasan_slab_free+0x100/0x170 [ 94.771994] __kmem_cache_free+0x178/0x2c8 [ 94.773871] kfree+0x74/0x138 [ 94.774574] kasan_strings+0xbc/0x478 [ 94.775942] kunit_try_run_case+0x114/0x298 [ 94.776889] kunit_generic_run_threadfn_adapter+0x38/0x60 [ 94.778026] kthread+0x18c/0x1a8 [ 94.778743] ret_from_fork+0x10/0x20 [ 94.779354] [ 94.780085] The buggy address belongs to the object at ffff0000c60910c0 [ 94.780085] which belongs to the cache kmalloc-32 of size 32 [ 94.781953] The buggy address is located 16 bytes inside of [ 94.781953] freed 32-byte region [ffff0000c60910c0, ffff0000c60910e0) [ 94.783810] [ 94.784243] The buggy address belongs to the physical page: [ 94.785103] page:0000000008bc5175 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106091 [ 94.786541] flags: 0xbfffc0000000800(slab|node=0|zone=2|lastcpupid=0xffff) [ 94.787657] page_type: 0xffffffff() [ 94.789239] raw: 0bfffc0000000800 ffff0000c0001500 dead000000000122 0000000000000000 [ 94.790691] raw: 0000000000000000 0000000080400040 00000001ffffffff 0000000000000000 [ 94.792778] page dumped because: kasan: bad access detected [ 94.794008] [ 94.794385] Memory state around the buggy address: [ 94.796795] ffff0000c6090f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 94.799272] ffff0000c6091000: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc [ 94.801191] >ffff0000c6091080: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 94.803531] ^ [ 94.805388] ffff0000c6091100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 94.807057] ffff0000c6091180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 94.807987] ==================================================================
[ 35.580140] ================================================================== [ 35.580627] BUG: KASAN: slab-use-after-free in strcmp+0x26/0x60 [ 35.581182] Read of size 1 at addr ffff888102869450 by task kunit_try_catch/220 [ 35.582036] [ 35.582419] CPU: 0 PID: 220 Comm: kunit_try_catch Tainted: G B N 6.6.94-rc1 #1 [ 35.582944] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 35.583622] Call Trace: [ 35.583974] <TASK> [ 35.584262] dump_stack_lvl+0x4e/0x90 [ 35.584676] print_report+0xd2/0x650 [ 35.584910] ? __virt_addr_valid+0x156/0x1e0 [ 35.585470] ? strcmp+0x26/0x60 [ 35.585712] ? kasan_complete_mode_report_info+0x64/0x200 [ 35.586200] ? strcmp+0x26/0x60 [ 35.586458] kasan_report+0x147/0x180 [ 35.587038] ? strcmp+0x26/0x60 [ 35.587411] __asan_load1+0x66/0x70 [ 35.587809] strcmp+0x26/0x60 [ 35.588185] kasan_strings+0x161/0x510 [ 35.588640] ? __pfx_kasan_strings+0x10/0x10 [ 35.589061] ? __schedule+0x715/0x11a0 [ 35.589308] ? ktime_get_ts64+0x118/0x140 [ 35.589596] kunit_try_run_case+0x120/0x290 [ 35.589840] ? __pfx_kunit_try_run_case+0x10/0x10 [ 35.590550] ? __kasan_check_write+0x18/0x20 [ 35.591032] ? trace_preempt_on+0x20/0xa0 [ 35.591488] ? __kthread_parkme+0x4f/0xd0 [ 35.591968] ? preempt_count_sub+0x50/0x80 [ 35.592404] ? __pfx_kunit_try_run_case+0x10/0x10 [ 35.592915] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 35.593434] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 35.593945] kthread+0x19e/0x1e0 [ 35.594183] ? __pfx_kthread+0x10/0x10 [ 35.594607] ret_from_fork+0x41/0x70 [ 35.594823] ? __pfx_kthread+0x10/0x10 [ 35.595122] ret_from_fork_asm+0x1b/0x30 [ 35.595745] </TASK> [ 35.596054] [ 35.596292] Allocated by task 220: [ 35.596614] kasan_save_stack+0x44/0x70 [ 35.597021] kasan_set_track+0x29/0x40 [ 35.597406] kasan_save_alloc_info+0x22/0x30 [ 35.597853] __kasan_kmalloc+0xb7/0xc0 [ 35.598233] kmalloc_trace+0x4c/0xb0 [ 35.598628] kasan_strings+0x9f/0x510 [ 35.599014] kunit_try_run_case+0x120/0x290 [ 35.599456] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 35.599833] kthread+0x19e/0x1e0 [ 35.600112] ret_from_fork+0x41/0x70 [ 35.600606] ret_from_fork_asm+0x1b/0x30 [ 35.601083] [ 35.601324] Freed by task 220: [ 35.601557] kasan_save_stack+0x44/0x70 [ 35.602028] kasan_set_track+0x29/0x40 [ 35.602259] kasan_save_free_info+0x2f/0x50 [ 35.602508] ____kasan_slab_free+0x172/0x1d0 [ 35.603014] __kasan_slab_free+0x16/0x20 [ 35.603406] __kmem_cache_free+0x190/0x310 [ 35.603851] kfree+0x7c/0x120 [ 35.604199] kasan_strings+0xc3/0x510 [ 35.604596] kunit_try_run_case+0x120/0x290 [ 35.605039] kunit_generic_run_threadfn_adapter+0x33/0x50 [ 35.605515] kthread+0x19e/0x1e0 [ 35.605906] ret_from_fork+0x41/0x70 [ 35.606282] ret_from_fork_asm+0x1b/0x30 [ 35.606666] [ 35.606935] The buggy address belongs to the object at ffff888102869440 [ 35.606935] which belongs to the cache kmalloc-32 of size 32 [ 35.607967] The buggy address is located 16 bytes inside of [ 35.607967] freed 32-byte region [ffff888102869440, ffff888102869460) [ 35.608945] [ 35.609270] The buggy address belongs to the physical page: [ 35.609657] page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102869 [ 35.610494] flags: 0x200000000000800(slab|node=0|zone=2) [ 35.611001] page_type: 0xffffffff() [ 35.611390] raw: 0200000000000800 ffff888100041500 dead000000000122 0000000000000000 [ 35.612128] raw: 0000000000000000 0000000080400040 00000001ffffffff 0000000000000000 [ 35.612727] page dumped because: kasan: bad access detected [ 35.613178] [ 35.613306] Memory state around the buggy address: [ 35.613799] ffff888102869300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 35.614373] ffff888102869380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 35.614928] >ffff888102869400: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 35.615557] ^ [ 35.616239] ffff888102869480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.616816] ffff888102869500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.617385] ==================================================================