Date
July 12, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.327758] ================================================================== [ 22.327887] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 22.327996] Read of size 1 at addr fff00000c5941f90 by task kunit_try_catch/260 [ 22.328118] [ 22.328190] CPU: 1 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 22.328379] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.328444] Hardware name: linux,dummy-virt (DT) [ 22.328516] Call trace: [ 22.328575] show_stack+0x20/0x38 (C) [ 22.328684] dump_stack_lvl+0x8c/0xd0 [ 22.328785] print_report+0x118/0x608 [ 22.328897] kasan_report+0xdc/0x128 [ 22.328999] __asan_report_load1_noabort+0x20/0x30 [ 22.330237] strnlen+0x80/0x88 [ 22.330481] kasan_strings+0x478/0xb00 [ 22.331291] kunit_try_run_case+0x170/0x3f0 [ 22.331437] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.331558] kthread+0x328/0x630 [ 22.332341] ret_from_fork+0x10/0x20 [ 22.332492] [ 22.332543] Allocated by task 260: [ 22.332607] kasan_save_stack+0x3c/0x68 [ 22.333052] kasan_save_track+0x20/0x40 [ 22.333306] kasan_save_alloc_info+0x40/0x58 [ 22.333553] __kasan_kmalloc+0xd4/0xd8 [ 22.333651] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.333749] kasan_strings+0xc8/0xb00 [ 22.333835] kunit_try_run_case+0x170/0x3f0 [ 22.333911] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.334385] kthread+0x328/0x630 [ 22.335397] ret_from_fork+0x10/0x20 [ 22.335485] [ 22.335518] Freed by task 260: [ 22.335555] kasan_save_stack+0x3c/0x68 [ 22.335623] kasan_save_track+0x20/0x40 [ 22.335681] kasan_save_free_info+0x4c/0x78 [ 22.335729] __kasan_slab_free+0x6c/0x98 [ 22.335773] kfree+0x214/0x3c8 [ 22.335817] kasan_strings+0x24c/0xb00 [ 22.335923] kunit_try_run_case+0x170/0x3f0 [ 22.336205] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.336406] kthread+0x328/0x630 [ 22.336577] ret_from_fork+0x10/0x20 [ 22.336776] [ 22.336851] The buggy address belongs to the object at fff00000c5941f80 [ 22.336851] which belongs to the cache kmalloc-32 of size 32 [ 22.337553] The buggy address is located 16 bytes inside of [ 22.337553] freed 32-byte region [fff00000c5941f80, fff00000c5941fa0) [ 22.337885] [ 22.337954] The buggy address belongs to the physical page: [ 22.338023] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105941 [ 22.338124] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.339278] page_type: f5(slab) [ 22.339458] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 22.339577] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 22.339679] page dumped because: kasan: bad access detected [ 22.339789] [ 22.339850] Memory state around the buggy address: [ 22.339937] fff00000c5941e80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 22.340046] fff00000c5941f00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 22.340151] >fff00000c5941f80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 22.340244] ^ [ 22.340318] fff00000c5942000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.340423] fff00000c5942080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.340518] ==================================================================
[ 14.645806] ================================================================== [ 14.646228] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 14.646486] Read of size 1 at addr ffff888103acf910 by task kunit_try_catch/277 [ 14.647227] [ 14.647347] CPU: 0 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.647390] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.647402] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.647422] Call Trace: [ 14.647437] <TASK> [ 14.647452] dump_stack_lvl+0x73/0xb0 [ 14.647480] print_report+0xd1/0x650 [ 14.647502] ? __virt_addr_valid+0x1db/0x2d0 [ 14.647525] ? strnlen+0x73/0x80 [ 14.647542] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.647566] ? strnlen+0x73/0x80 [ 14.647584] kasan_report+0x141/0x180 [ 14.647606] ? strnlen+0x73/0x80 [ 14.647628] __asan_report_load1_noabort+0x18/0x20 [ 14.647653] strnlen+0x73/0x80 [ 14.647686] kasan_strings+0x615/0xe80 [ 14.647706] ? trace_hardirqs_on+0x37/0xe0 [ 14.647730] ? __pfx_kasan_strings+0x10/0x10 [ 14.647763] ? finish_task_switch.isra.0+0x153/0x700 [ 14.647785] ? __switch_to+0x47/0xf50 [ 14.647811] ? __schedule+0x10cc/0x2b60 [ 14.647832] ? __pfx_read_tsc+0x10/0x10 [ 14.647853] ? ktime_get_ts64+0x86/0x230 [ 14.647877] kunit_try_run_case+0x1a5/0x480 [ 14.647901] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.647925] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.647948] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.647972] ? __kthread_parkme+0x82/0x180 [ 14.647991] ? preempt_count_sub+0x50/0x80 [ 14.648014] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.648039] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.648064] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.648090] kthread+0x337/0x6f0 [ 14.648108] ? trace_preempt_on+0x20/0xc0 [ 14.648130] ? __pfx_kthread+0x10/0x10 [ 14.648150] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.648172] ? calculate_sigpending+0x7b/0xa0 [ 14.648196] ? __pfx_kthread+0x10/0x10 [ 14.648217] ret_from_fork+0x116/0x1d0 [ 14.648235] ? __pfx_kthread+0x10/0x10 [ 14.648255] ret_from_fork_asm+0x1a/0x30 [ 14.648285] </TASK> [ 14.648294] [ 14.656256] Allocated by task 277: [ 14.656449] kasan_save_stack+0x45/0x70 [ 14.656656] kasan_save_track+0x18/0x40 [ 14.656912] kasan_save_alloc_info+0x3b/0x50 [ 14.657167] __kasan_kmalloc+0xb7/0xc0 [ 14.657357] __kmalloc_cache_noprof+0x189/0x420 [ 14.657582] kasan_strings+0xc0/0xe80 [ 14.657833] kunit_try_run_case+0x1a5/0x480 [ 14.658020] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.658256] kthread+0x337/0x6f0 [ 14.658392] ret_from_fork+0x116/0x1d0 [ 14.658524] ret_from_fork_asm+0x1a/0x30 [ 14.658822] [ 14.658923] Freed by task 277: [ 14.659081] kasan_save_stack+0x45/0x70 [ 14.659277] kasan_save_track+0x18/0x40 [ 14.659458] kasan_save_free_info+0x3f/0x60 [ 14.659870] __kasan_slab_free+0x56/0x70 [ 14.660034] kfree+0x222/0x3f0 [ 14.660152] kasan_strings+0x2aa/0xe80 [ 14.660285] kunit_try_run_case+0x1a5/0x480 [ 14.660430] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.660673] kthread+0x337/0x6f0 [ 14.661031] ret_from_fork+0x116/0x1d0 [ 14.661223] ret_from_fork_asm+0x1a/0x30 [ 14.661418] [ 14.661510] The buggy address belongs to the object at ffff888103acf900 [ 14.661510] which belongs to the cache kmalloc-32 of size 32 [ 14.662156] The buggy address is located 16 bytes inside of [ 14.662156] freed 32-byte region [ffff888103acf900, ffff888103acf920) [ 14.662575] [ 14.662646] The buggy address belongs to the physical page: [ 14.662955] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103acf [ 14.663293] flags: 0x200000000000000(node=0|zone=2) [ 14.663511] page_type: f5(slab) [ 14.663710] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.664023] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.664272] page dumped because: kasan: bad access detected [ 14.664459] [ 14.664550] Memory state around the buggy address: [ 14.665031] ffff888103acf800: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.665381] ffff888103acf880: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.665729] >ffff888103acf900: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.665956] ^ [ 14.666133] ffff888103acf980: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.666457] ffff888103acfa00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.666779] ==================================================================