Date
June 16, 2025, 7:07 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.289762] ================================================================== [ 22.289887] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 22.290005] Read of size 1 at addr fff00000c63fb310 by task kunit_try_catch/268 [ 22.290077] [ 22.290134] CPU: 0 UID: 0 PID: 268 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT [ 22.290244] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.290280] Hardware name: linux,dummy-virt (DT) [ 22.290325] Call trace: [ 22.290359] show_stack+0x20/0x38 (C) [ 22.290426] dump_stack_lvl+0x8c/0xd0 [ 22.290483] print_report+0x118/0x608 [ 22.290543] kasan_report+0xdc/0x128 [ 22.290611] __asan_report_load1_noabort+0x20/0x30 [ 22.290680] strnlen+0x80/0x88 [ 22.290736] kasan_strings+0x478/0xb00 [ 22.290795] kunit_try_run_case+0x170/0x3f0 [ 22.290866] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.290935] kthread+0x328/0x630 [ 22.290986] ret_from_fork+0x10/0x20 [ 22.291044] [ 22.291073] Allocated by task 268: [ 22.291109] kasan_save_stack+0x3c/0x68 [ 22.291162] kasan_save_track+0x20/0x40 [ 22.291218] kasan_save_alloc_info+0x40/0x58 [ 22.291282] __kasan_kmalloc+0xd4/0xd8 [ 22.291332] __kmalloc_cache_noprof+0x16c/0x3c0 [ 22.291383] kasan_strings+0xc8/0xb00 [ 22.291425] kunit_try_run_case+0x170/0x3f0 [ 22.291469] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.291520] kthread+0x328/0x630 [ 22.291562] ret_from_fork+0x10/0x20 [ 22.291606] [ 22.291633] Freed by task 268: [ 22.291669] kasan_save_stack+0x3c/0x68 [ 22.291715] kasan_save_track+0x20/0x40 [ 22.291771] kasan_save_free_info+0x4c/0x78 [ 22.291824] __kasan_slab_free+0x6c/0x98 [ 22.291883] kfree+0x214/0x3c8 [ 22.291926] kasan_strings+0x24c/0xb00 [ 22.291969] kunit_try_run_case+0x170/0x3f0 [ 22.292012] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.292060] kthread+0x328/0x630 [ 22.292097] ret_from_fork+0x10/0x20 [ 22.292139] [ 22.292164] The buggy address belongs to the object at fff00000c63fb300 [ 22.292164] which belongs to the cache kmalloc-32 of size 32 [ 22.292230] The buggy address is located 16 bytes inside of [ 22.292230] freed 32-byte region [fff00000c63fb300, fff00000c63fb320) [ 22.292297] [ 22.292322] The buggy address belongs to the physical page: [ 22.292361] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1063fb [ 22.292424] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.292481] page_type: f5(slab) [ 22.292528] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 22.292586] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 22.292633] page dumped because: kasan: bad access detected [ 22.292669] [ 22.292692] Memory state around the buggy address: [ 22.292732] fff00000c63fb200: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 22.292815] fff00000c63fb280: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 22.292879] >fff00000c63fb300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 22.292928] ^ [ 22.292965] fff00000c63fb380: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 22.293075] fff00000c63fb400: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 22.293129] ==================================================================
[ 13.492574] ================================================================== [ 13.493175] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 13.493514] Read of size 1 at addr ffff8881028dc250 by task kunit_try_catch/284 [ 13.493809] [ 13.493910] CPU: 1 UID: 0 PID: 284 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250616 #1 PREEMPT(voluntary) [ 13.493968] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.493980] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.494000] Call Trace: [ 13.494017] <TASK> [ 13.494034] dump_stack_lvl+0x73/0xb0 [ 13.494064] print_report+0xd1/0x650 [ 13.494086] ? __virt_addr_valid+0x1db/0x2d0 [ 13.494108] ? strnlen+0x73/0x80 [ 13.494128] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.494150] ? strnlen+0x73/0x80 [ 13.494170] kasan_report+0x141/0x180 [ 13.494191] ? strnlen+0x73/0x80 [ 13.494216] __asan_report_load1_noabort+0x18/0x20 [ 13.494239] strnlen+0x73/0x80 [ 13.494260] kasan_strings+0x615/0xe80 [ 13.494279] ? trace_hardirqs_on+0x37/0xe0 [ 13.494303] ? __pfx_kasan_strings+0x10/0x10 [ 13.494322] ? finish_task_switch.isra.0+0x153/0x700 [ 13.494344] ? __switch_to+0x47/0xf50 [ 13.494369] ? __schedule+0x10cc/0x2b60 [ 13.494389] ? __pfx_read_tsc+0x10/0x10 [ 13.494409] ? ktime_get_ts64+0x86/0x230 [ 13.494434] kunit_try_run_case+0x1a5/0x480 [ 13.494457] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.494478] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.494499] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.494521] ? __kthread_parkme+0x82/0x180 [ 13.494540] ? preempt_count_sub+0x50/0x80 [ 13.494562] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.494584] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.494606] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.494629] kthread+0x337/0x6f0 [ 13.494719] ? trace_preempt_on+0x20/0xc0 [ 13.494746] ? __pfx_kthread+0x10/0x10 [ 13.494766] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.494786] ? calculate_sigpending+0x7b/0xa0 [ 13.494810] ? __pfx_kthread+0x10/0x10 [ 13.494830] ret_from_fork+0x116/0x1d0 [ 13.494848] ? __pfx_kthread+0x10/0x10 [ 13.494868] ret_from_fork_asm+0x1a/0x30 [ 13.494897] </TASK> [ 13.494907] [ 13.502089] Allocated by task 284: [ 13.502276] kasan_save_stack+0x45/0x70 [ 13.502661] kasan_save_track+0x18/0x40 [ 13.502871] kasan_save_alloc_info+0x3b/0x50 [ 13.503096] __kasan_kmalloc+0xb7/0xc0 [ 13.503277] __kmalloc_cache_noprof+0x189/0x420 [ 13.503552] kasan_strings+0xc0/0xe80 [ 13.503684] kunit_try_run_case+0x1a5/0x480 [ 13.503821] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.504080] kthread+0x337/0x6f0 [ 13.504242] ret_from_fork+0x116/0x1d0 [ 13.504632] ret_from_fork_asm+0x1a/0x30 [ 13.504847] [ 13.504948] Freed by task 284: [ 13.505077] kasan_save_stack+0x45/0x70 [ 13.505206] kasan_save_track+0x18/0x40 [ 13.505389] kasan_save_free_info+0x3f/0x60 [ 13.505606] __kasan_slab_free+0x56/0x70 [ 13.505778] kfree+0x222/0x3f0 [ 13.505921] kasan_strings+0x2aa/0xe80 [ 13.506091] kunit_try_run_case+0x1a5/0x480 [ 13.506229] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.506392] kthread+0x337/0x6f0 [ 13.506504] ret_from_fork+0x116/0x1d0 [ 13.506627] ret_from_fork_asm+0x1a/0x30 [ 13.506757] [ 13.506822] The buggy address belongs to the object at ffff8881028dc240 [ 13.506822] which belongs to the cache kmalloc-32 of size 32 [ 13.507565] The buggy address is located 16 bytes inside of [ 13.507565] freed 32-byte region [ffff8881028dc240, ffff8881028dc260) [ 13.508087] [ 13.508180] The buggy address belongs to the physical page: [ 13.508599] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1028dc [ 13.508964] flags: 0x200000000000000(node=0|zone=2) [ 13.509203] page_type: f5(slab) [ 13.509497] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.509833] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.510161] page dumped because: kasan: bad access detected [ 13.510506] [ 13.510598] Memory state around the buggy address: [ 13.510809] ffff8881028dc100: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc [ 13.511025] ffff8881028dc180: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.511227] >ffff8881028dc200: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.511515] ^ [ 13.511798] ffff8881028dc280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.512124] ffff8881028dc300: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.512492] ==================================================================