Date
July 10, 2025, 11:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.257391] ================================================================== [ 18.257465] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 18.257831] Read of size 1 at addr fff00000c63569d0 by task kunit_try_catch/259 [ 18.258134] [ 18.258506] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 18.258969] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.259096] Hardware name: linux,dummy-virt (DT) [ 18.259158] Call trace: [ 18.259602] show_stack+0x20/0x38 (C) [ 18.259714] dump_stack_lvl+0x8c/0xd0 [ 18.259845] print_report+0x118/0x608 [ 18.259898] kasan_report+0xdc/0x128 [ 18.260145] __asan_report_load1_noabort+0x20/0x30 [ 18.260356] strcmp+0xc0/0xc8 [ 18.260456] kasan_strings+0x340/0xb00 [ 18.260903] kunit_try_run_case+0x170/0x3f0 [ 18.261060] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.261148] kthread+0x328/0x630 [ 18.261255] ret_from_fork+0x10/0x20 [ 18.261637] [ 18.261737] Allocated by task 259: [ 18.261793] kasan_save_stack+0x3c/0x68 [ 18.262024] kasan_save_track+0x20/0x40 [ 18.262226] kasan_save_alloc_info+0x40/0x58 [ 18.262336] __kasan_kmalloc+0xd4/0xd8 [ 18.262431] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.262511] kasan_strings+0xc8/0xb00 [ 18.262593] kunit_try_run_case+0x170/0x3f0 [ 18.262771] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.263094] kthread+0x328/0x630 [ 18.263175] ret_from_fork+0x10/0x20 [ 18.263215] [ 18.263237] Freed by task 259: [ 18.263406] kasan_save_stack+0x3c/0x68 [ 18.263565] kasan_save_track+0x20/0x40 [ 18.263717] kasan_save_free_info+0x4c/0x78 [ 18.263814] __kasan_slab_free+0x6c/0x98 [ 18.263928] kfree+0x214/0x3c8 [ 18.264006] kasan_strings+0x24c/0xb00 [ 18.264439] kunit_try_run_case+0x170/0x3f0 [ 18.264535] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.264925] kthread+0x328/0x630 [ 18.265220] ret_from_fork+0x10/0x20 [ 18.265463] [ 18.265664] The buggy address belongs to the object at fff00000c63569c0 [ 18.265664] which belongs to the cache kmalloc-32 of size 32 [ 18.265811] The buggy address is located 16 bytes inside of [ 18.265811] freed 32-byte region [fff00000c63569c0, fff00000c63569e0) [ 18.265920] [ 18.265992] The buggy address belongs to the physical page: [ 18.266029] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106356 [ 18.266097] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.266487] page_type: f5(slab) [ 18.266589] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 18.266717] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 18.266783] page dumped because: kasan: bad access detected [ 18.266852] [ 18.266971] Memory state around the buggy address: [ 18.267058] fff00000c6356880: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.267352] fff00000c6356900: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 18.267557] >fff00000c6356980: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 18.267706] ^ [ 18.267796] fff00000c6356a00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.267916] fff00000c6356a80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 18.267985] ==================================================================
[ 14.607108] ================================================================== [ 14.608115] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 14.608383] Read of size 1 at addr ffff8881039ba750 by task kunit_try_catch/277 [ 14.608811] [ 14.608940] CPU: 1 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.608984] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.608995] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.609016] Call Trace: [ 14.609029] <TASK> [ 14.609045] dump_stack_lvl+0x73/0xb0 [ 14.609077] print_report+0xd1/0x650 [ 14.609101] ? __virt_addr_valid+0x1db/0x2d0 [ 14.609125] ? strcmp+0xb0/0xc0 [ 14.609142] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.609165] ? strcmp+0xb0/0xc0 [ 14.609183] kasan_report+0x141/0x180 [ 14.609204] ? strcmp+0xb0/0xc0 [ 14.609225] __asan_report_load1_noabort+0x18/0x20 [ 14.609250] strcmp+0xb0/0xc0 [ 14.609269] kasan_strings+0x431/0xe80 [ 14.609291] ? __pfx_kasan_strings+0x10/0x10 [ 14.609312] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 14.609345] ? __pfx_kasan_strings+0x10/0x10 [ 14.609384] kunit_try_run_case+0x1a5/0x480 [ 14.609410] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.609506] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.609535] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.609560] ? __kthread_parkme+0x82/0x180 [ 14.609581] ? preempt_count_sub+0x50/0x80 [ 14.609606] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.609631] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.609656] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.609682] kthread+0x337/0x6f0 [ 14.609701] ? trace_preempt_on+0x20/0xc0 [ 14.609725] ? __pfx_kthread+0x10/0x10 [ 14.609746] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.609768] ? calculate_sigpending+0x7b/0xa0 [ 14.609792] ? __pfx_kthread+0x10/0x10 [ 14.609814] ret_from_fork+0x116/0x1d0 [ 14.609834] ? __pfx_kthread+0x10/0x10 [ 14.609854] ret_from_fork_asm+0x1a/0x30 [ 14.609885] </TASK> [ 14.609896] [ 14.617259] Allocated by task 277: [ 14.617519] kasan_save_stack+0x45/0x70 [ 14.617722] kasan_save_track+0x18/0x40 [ 14.617914] kasan_save_alloc_info+0x3b/0x50 [ 14.618108] __kasan_kmalloc+0xb7/0xc0 [ 14.618273] __kmalloc_cache_noprof+0x189/0x420 [ 14.618503] kasan_strings+0xc0/0xe80 [ 14.618768] kunit_try_run_case+0x1a5/0x480 [ 14.618946] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.619201] kthread+0x337/0x6f0 [ 14.619343] ret_from_fork+0x116/0x1d0 [ 14.619615] ret_from_fork_asm+0x1a/0x30 [ 14.619773] [ 14.619844] Freed by task 277: [ 14.620005] kasan_save_stack+0x45/0x70 [ 14.620211] kasan_save_track+0x18/0x40 [ 14.620397] kasan_save_free_info+0x3f/0x60 [ 14.620546] __kasan_slab_free+0x56/0x70 [ 14.620925] kfree+0x222/0x3f0 [ 14.621151] kasan_strings+0x2aa/0xe80 [ 14.621320] kunit_try_run_case+0x1a5/0x480 [ 14.621621] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.621838] kthread+0x337/0x6f0 [ 14.621961] ret_from_fork+0x116/0x1d0 [ 14.622150] ret_from_fork_asm+0x1a/0x30 [ 14.622428] [ 14.622534] The buggy address belongs to the object at ffff8881039ba740 [ 14.622534] which belongs to the cache kmalloc-32 of size 32 [ 14.622987] The buggy address is located 16 bytes inside of [ 14.622987] freed 32-byte region [ffff8881039ba740, ffff8881039ba760) [ 14.623537] [ 14.623613] The buggy address belongs to the physical page: [ 14.623786] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039ba [ 14.624027] flags: 0x200000000000000(node=0|zone=2) [ 14.624232] page_type: f5(slab) [ 14.624407] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.624746] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.625078] page dumped because: kasan: bad access detected [ 14.625290] [ 14.625367] Memory state around the buggy address: [ 14.625523] ffff8881039ba600: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.625740] ffff8881039ba680: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.626172] >ffff8881039ba700: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.626512] ^ [ 14.626994] ffff8881039ba780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.627326] ffff8881039ba800: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.627728] ==================================================================