Date
July 8, 2025, 11:10 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 33.512729] ================================================================== [ 33.512783] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 33.512834] Read of size 1 at addr fff00000c9a662d0 by task kunit_try_catch/290 [ 33.512885] [ 33.513845] CPU: 0 UID: 0 PID: 290 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250708 #1 PREEMPT [ 33.514094] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.514257] Hardware name: linux,dummy-virt (DT) [ 33.514464] Call trace: [ 33.514524] show_stack+0x20/0x38 (C) [ 33.514626] dump_stack_lvl+0x8c/0xd0 [ 33.514716] print_report+0x118/0x5d0 [ 33.515121] kasan_report+0xdc/0x128 [ 33.515262] __asan_report_load1_noabort+0x20/0x30 [ 33.515348] strcmp+0xc0/0xc8 [ 33.515503] kasan_strings+0x340/0xb00 [ 33.515567] kunit_try_run_case+0x170/0x3f0 [ 33.516034] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.516154] kthread+0x328/0x630 [ 33.516377] ret_from_fork+0x10/0x20 [ 33.516583] [ 33.516612] Allocated by task 290: [ 33.516680] kasan_save_stack+0x3c/0x68 [ 33.516728] kasan_save_track+0x20/0x40 [ 33.517021] kasan_save_alloc_info+0x40/0x58 [ 33.517173] __kasan_kmalloc+0xd4/0xd8 [ 33.517263] __kmalloc_cache_noprof+0x16c/0x3c0 [ 33.517486] kasan_strings+0xc8/0xb00 [ 33.517667] kunit_try_run_case+0x170/0x3f0 [ 33.517804] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.517854] kthread+0x328/0x630 [ 33.517891] ret_from_fork+0x10/0x20 [ 33.518111] [ 33.518178] Freed by task 290: [ 33.518353] kasan_save_stack+0x3c/0x68 [ 33.518446] kasan_save_track+0x20/0x40 [ 33.518709] kasan_save_free_info+0x4c/0x78 [ 33.518896] __kasan_slab_free+0x6c/0x98 [ 33.518977] kfree+0x214/0x3c8 [ 33.519061] kasan_strings+0x24c/0xb00 [ 33.519166] kunit_try_run_case+0x170/0x3f0 [ 33.519253] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.519472] kthread+0x328/0x630 [ 33.519661] ret_from_fork+0x10/0x20 [ 33.519773] [ 33.519850] The buggy address belongs to the object at fff00000c9a662c0 [ 33.519850] which belongs to the cache kmalloc-32 of size 32 [ 33.520150] The buggy address is located 16 bytes inside of [ 33.520150] freed 32-byte region [fff00000c9a662c0, fff00000c9a662e0) [ 33.520335] [ 33.520377] The buggy address belongs to the physical page: [ 33.520425] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x109a66 [ 33.520566] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 33.520664] page_type: f5(slab) [ 33.521036] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 33.521107] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 33.521731] >fff00000c9a66280: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 33.524990] Hardware name: linux,dummy-virt (DT) [ 33.525824] __kasan_kmalloc+0xd4/0xd8 [ 33.527676] kthread+0x328/0x630 [ 33.528345] [ 33.528880] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 33.529725] fff00000c9a66300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 33.531523] Hardware name: linux,dummy-virt (DT) [ 33.534064] kthread+0x328/0x630 [ 33.534620] kasan_save_track+0x20/0x40 [ 33.536379] The buggy address is located 16 bytes inside of [ 33.536379] freed 32-byte region [fff00000c9a662c0, fff00000c9a662e0) [ 33.538229] >fff00000c9a66280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 33.540252] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.541902] __kasan_kmalloc+0xd4/0xd8 [ 33.542316] kasan_save_stack+0x3c/0x68 [ 33.542839] The buggy address belongs to the object at fff00000c9a662c0 [ 33.542839] which belongs to the cache kmalloc-32 of size 32 [ 33.554870] BUG: KASAN: slab-out-of-bounds in kasan_bitops_modify.constprop.0+0x100/0xbc0 [ 33.556511] kthread+0x328/0x630 [ 33.557958] kthread+0x328/0x630 [ 33.558591] The buggy address belongs to the physical page: [ 33.559475] fff00000c7981600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 33.562164] Call trace: [ 33.562870] kasan_report+0xdc/0x128 [ 33.563808] [ 33.564106] __kasan_kmalloc+0xd4/0xd8 [ 33.564787] ret_from_fork+0x10/0x20 [ 33.565204] [ 33.565847] page_type: f5(slab) [ 33.566906] ^ [ 33.567440] ==================================================================
[ 25.337015] ================================================================== [ 25.338986] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 25.339681] Read of size 1 at addr ffff88810627a650 by task kunit_try_catch/307 [ 25.341008] [ 25.341248] CPU: 1 UID: 0 PID: 307 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250708 #1 PREEMPT(voluntary) [ 25.341310] Tainted: [B]=BAD_PAGE, [N]=TEST [ 25.341324] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 25.341349] Call Trace: [ 25.341363] <TASK> [ 25.341385] dump_stack_lvl+0x73/0xb0 [ 25.341457] print_report+0xd1/0x610 [ 25.341486] ? __virt_addr_valid+0x1db/0x2d0 [ 25.341513] ? strcmp+0xb0/0xc0 [ 25.341535] ? kasan_complete_mode_report_info+0x64/0x200 [ 25.341566] ? strcmp+0xb0/0xc0 [ 25.341588] kasan_report+0x141/0x180 [ 25.341611] ? strcmp+0xb0/0xc0 [ 25.341637] __asan_report_load1_noabort+0x18/0x20 [ 25.341664] strcmp+0xb0/0xc0 [ 25.341689] kasan_strings+0x431/0xe80 [ 25.341712] ? trace_hardirqs_on+0x37/0xe0 [ 25.341739] ? __pfx_kasan_strings+0x10/0x10 [ 25.341819] ? __kasan_check_write+0x18/0x20 [ 25.341847] ? queued_spin_lock_slowpath+0x116/0xb40 [ 25.341869] ? irqentry_exit+0x2a/0x60 [ 25.341891] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 25.341915] ? trace_hardirqs_on+0x37/0xe0 [ 25.341939] ? __pfx_read_tsc+0x10/0x10 [ 25.341965] ? ktime_get_ts64+0x86/0x230 [ 25.341993] kunit_try_run_case+0x1a5/0x480 [ 25.342018] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.342040] ? queued_spin_lock_slowpath+0x116/0xb40 [ 25.342062] ? __kthread_parkme+0x82/0x180 [ 25.342084] ? preempt_count_sub+0x50/0x80 [ 25.342109] ? __pfx_kunit_try_run_case+0x10/0x10 [ 25.342131] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.342159] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 25.342186] kthread+0x337/0x6f0 [ 25.342207] ? trace_preempt_on+0x20/0xc0 [ 25.342232] ? __pfx_kthread+0x10/0x10 [ 25.342268] ? _raw_spin_unlock_irq+0x47/0x80 [ 25.342295] ? calculate_sigpending+0x7b/0xa0 [ 25.342324] ? __pfx_kthread+0x10/0x10 [ 25.342348] ret_from_fork+0x116/0x1d0 [ 25.342369] ? __pfx_kthread+0x10/0x10 [ 25.342391] ret_from_fork_asm+0x1a/0x30 [ 25.342426] </TASK> [ 25.342439] [ 25.356088] Allocated by task 307: [ 25.356422] kasan_save_stack+0x45/0x70 [ 25.356582] kasan_save_track+0x18/0x40 [ 25.356713] kasan_save_alloc_info+0x3b/0x50 [ 25.357149] __kasan_kmalloc+0xb7/0xc0 [ 25.357561] __kmalloc_cache_noprof+0x189/0x420 [ 25.358050] kasan_strings+0xc0/0xe80 [ 25.358401] kunit_try_run_case+0x1a5/0x480 [ 25.358790] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.359286] kthread+0x337/0x6f0 [ 25.359413] ret_from_fork+0x116/0x1d0 [ 25.359541] ret_from_fork_asm+0x1a/0x30 [ 25.359679] [ 25.359745] Freed by task 307: [ 25.360495] kasan_save_stack+0x45/0x70 [ 25.360878] kasan_save_track+0x18/0x40 [ 25.361351] kasan_save_free_info+0x3f/0x60 [ 25.361743] __kasan_slab_free+0x56/0x70 [ 25.362166] kfree+0x222/0x3f0 [ 25.362476] kasan_strings+0x2aa/0xe80 [ 25.362887] kunit_try_run_case+0x1a5/0x480 [ 25.363199] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 25.363387] kthread+0x337/0x6f0 [ 25.363507] ret_from_fork+0x116/0x1d0 [ 25.363636] ret_from_fork_asm+0x1a/0x30 [ 25.363779] [ 25.363848] The buggy address belongs to the object at ffff88810627a640 [ 25.363848] which belongs to the cache kmalloc-32 of size 32 [ 25.364482] The buggy address is located 16 bytes inside of [ 25.364482] freed 32-byte region [ffff88810627a640, ffff88810627a660) [ 25.364909] [ 25.365006] The buggy address belongs to the physical page: [ 25.365259] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10627a [ 25.365742] flags: 0x200000000000000(node=0|zone=2) [ 25.365964] page_type: f5(slab) [ 25.366136] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 25.366566] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 25.366984] page dumped because: kasan: bad access detected [ 25.367250] [ 25.367341] Memory state around the buggy address: [ 25.367564] ffff88810627a500: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc [ 25.367824] ffff88810627a580: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 25.368034] >ffff88810627a600: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 25.368362] ^ [ 25.368622] ffff88810627a680: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 25.369064] ffff88810627a700: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 25.369388] ==================================================================