Date
June 17, 2025, 6:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.248311] ================================================================== [ 19.248358] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 19.248404] Read of size 1 at addr fff00000c5211590 by task kunit_try_catch/268 [ 19.248455] [ 19.248485] CPU: 1 UID: 0 PID: 268 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250617 #1 PREEMPT [ 19.248573] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.248603] Hardware name: linux,dummy-virt (DT) [ 19.248636] Call trace: [ 19.248659] show_stack+0x20/0x38 (C) [ 19.248707] dump_stack_lvl+0x8c/0xd0 [ 19.248756] print_report+0x118/0x608 [ 19.248803] kasan_report+0xdc/0x128 [ 19.248852] __asan_report_load1_noabort+0x20/0x30 [ 19.248901] strnlen+0x80/0x88 [ 19.248961] kasan_strings+0x478/0xb00 [ 19.249007] kunit_try_run_case+0x170/0x3f0 [ 19.249056] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.249111] kthread+0x328/0x630 [ 19.249153] ret_from_fork+0x10/0x20 [ 19.249203] [ 19.249222] Allocated by task 268: [ 19.249251] kasan_save_stack+0x3c/0x68 [ 19.249294] kasan_save_track+0x20/0x40 [ 19.249334] kasan_save_alloc_info+0x40/0x58 [ 19.249373] __kasan_kmalloc+0xd4/0xd8 [ 19.249412] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.249454] kasan_strings+0xc8/0xb00 [ 19.249491] kunit_try_run_case+0x170/0x3f0 [ 19.249532] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.249581] kthread+0x328/0x630 [ 19.249615] ret_from_fork+0x10/0x20 [ 19.249652] [ 19.249673] Freed by task 268: [ 19.249700] kasan_save_stack+0x3c/0x68 [ 19.249740] kasan_save_track+0x20/0x40 [ 19.249781] kasan_save_free_info+0x4c/0x78 [ 19.249820] __kasan_slab_free+0x6c/0x98 [ 19.249861] kfree+0x214/0x3c8 [ 19.249896] kasan_strings+0x24c/0xb00 [ 19.249946] kunit_try_run_case+0x170/0x3f0 [ 19.250138] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.250198] kthread+0x328/0x630 [ 19.250233] ret_from_fork+0x10/0x20 [ 19.250271] [ 19.250293] The buggy address belongs to the object at fff00000c5211580 [ 19.250293] which belongs to the cache kmalloc-32 of size 32 [ 19.250353] The buggy address is located 16 bytes inside of [ 19.250353] freed 32-byte region [fff00000c5211580, fff00000c52115a0) [ 19.250418] [ 19.250448] The buggy address belongs to the physical page: [ 19.250606] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105211 [ 19.250683] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.250733] page_type: f5(slab) [ 19.250780] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.251031] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.251087] page dumped because: kasan: bad access detected [ 19.251120] [ 19.251141] Memory state around the buggy address: [ 19.251172] fff00000c5211480: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.251217] fff00000c5211500: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 19.251268] >fff00000c5211580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.262894] CPU: 1 UID: 0 PID: 270 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250617 #1 PREEMPT [ 19.264268] kunit_try_run_case+0x170/0x3f0 [ 19.264850] Allocated by task 270: [ 19.265217] kasan_save_alloc_info+0x40/0x58 [ 19.265380] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.265694] kthread+0x328/0x630 [ 19.265920] The buggy address is located 8 bytes inside of [ 19.265920] allocated 9-byte region [fff00000c1193720, fff00000c1193729) [ 19.267165] fff00000c1193600: fa fb fc fc fa fb fc fc fa fb fc fc fa fb fc fc [ 19.269852] ==================================================================
[ 20.961454] ================================================================== [ 20.961903] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 20.963106] Read of size 1 at addr ffff88810383f710 by task kunit_try_catch/286 [ 20.964393] [ 20.965106] CPU: 1 UID: 0 PID: 286 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250617 #1 PREEMPT(voluntary) [ 20.965239] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.965275] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 20.965334] Call Trace: [ 20.965382] <TASK> [ 20.965430] dump_stack_lvl+0x73/0xb0 [ 20.965516] print_report+0xd1/0x650 [ 20.965586] ? __virt_addr_valid+0x1db/0x2d0 [ 20.965623] ? strnlen+0x73/0x80 [ 20.965651] ? kasan_complete_mode_report_info+0x64/0x200 [ 20.965684] ? strnlen+0x73/0x80 [ 20.965712] kasan_report+0x141/0x180 [ 20.965741] ? strnlen+0x73/0x80 [ 20.965777] __asan_report_load1_noabort+0x18/0x20 [ 20.965811] strnlen+0x73/0x80 [ 20.965869] kasan_strings+0x615/0xe80 [ 20.965901] ? trace_hardirqs_on+0x37/0xe0 [ 20.965937] ? __pfx_kasan_strings+0x10/0x10 [ 20.965966] ? finish_task_switch.isra.0+0x153/0x700 [ 20.965999] ? __switch_to+0x47/0xf50 [ 20.966033] ? __schedule+0x10cc/0x2b60 [ 20.966060] ? __pfx_read_tsc+0x10/0x10 [ 20.966090] ? ktime_get_ts64+0x86/0x230 [ 20.966122] kunit_try_run_case+0x1a5/0x480 [ 20.966158] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.966190] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 20.966228] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 20.966309] ? __kthread_parkme+0x82/0x180 [ 20.966362] ? preempt_count_sub+0x50/0x80 [ 20.966395] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.966429] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.966463] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 20.966496] kthread+0x337/0x6f0 [ 20.966524] ? trace_preempt_on+0x20/0xc0 [ 20.966556] ? __pfx_kthread+0x10/0x10 [ 20.966583] ? _raw_spin_unlock_irq+0x47/0x80 [ 20.966618] ? calculate_sigpending+0x7b/0xa0 [ 20.966651] ? __pfx_kthread+0x10/0x10 [ 20.966679] ret_from_fork+0x116/0x1d0 [ 20.966705] ? __pfx_kthread+0x10/0x10 [ 20.966732] ret_from_fork_asm+0x1a/0x30 [ 20.966773] </TASK> [ 20.966787] [ 20.985939] Allocated by task 286: [ 20.986337] kasan_save_stack+0x45/0x70 [ 20.986754] kasan_save_track+0x18/0x40 [ 20.987589] kasan_save_alloc_info+0x3b/0x50 [ 20.987964] __kasan_kmalloc+0xb7/0xc0 [ 20.988930] __kmalloc_cache_noprof+0x189/0x420 [ 20.989626] kasan_strings+0xc0/0xe80 [ 20.990040] kunit_try_run_case+0x1a5/0x480 [ 20.990653] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.991587] kthread+0x337/0x6f0 [ 20.991946] ret_from_fork+0x116/0x1d0 [ 20.992664] ret_from_fork_asm+0x1a/0x30 [ 20.993077] [ 20.993291] Freed by task 286: [ 20.993559] kasan_save_stack+0x45/0x70 [ 20.993943] kasan_save_track+0x18/0x40 [ 20.994335] kasan_save_free_info+0x3f/0x60 [ 20.994740] __kasan_slab_free+0x56/0x70 [ 20.995361] kfree+0x222/0x3f0 [ 20.995626] kasan_strings+0x2aa/0xe80 [ 20.996003] kunit_try_run_case+0x1a5/0x480 [ 20.996904] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.997589] kthread+0x337/0x6f0 [ 20.997931] ret_from_fork+0x116/0x1d0 [ 20.998544] ret_from_fork_asm+0x1a/0x30 [ 20.998942] [ 20.999114] The buggy address belongs to the object at ffff88810383f700 [ 20.999114] which belongs to the cache kmalloc-32 of size 32 [ 21.000259] The buggy address is located 16 bytes inside of [ 21.000259] freed 32-byte region [ffff88810383f700, ffff88810383f720) [ 21.001539] [ 21.001910] The buggy address belongs to the physical page: [ 21.002584] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10383f [ 21.003293] flags: 0x200000000000000(node=0|zone=2) [ 21.003723] page_type: f5(slab) [ 21.004205] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 21.005081] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 21.005811] page dumped because: kasan: bad access detected [ 21.006370] [ 21.006720] Memory state around the buggy address: [ 21.007150] ffff88810383f600: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.007930] ffff88810383f680: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 21.008571] >ffff88810383f700: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.009618] ^ [ 21.009993] ffff88810383f780: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 21.010717] ffff88810383f800: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 21.011448] ==================================================================