Date
July 10, 2025, 6:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.192261] ================================================================== [ 19.192436] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 19.192500] Read of size 1 at addr fff00000c5a4d450 by task kunit_try_catch/259 [ 19.192553] [ 19.192677] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 19.192768] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.192950] Hardware name: linux,dummy-virt (DT) [ 19.192986] Call trace: [ 19.193011] show_stack+0x20/0x38 (C) [ 19.193066] dump_stack_lvl+0x8c/0xd0 [ 19.193264] print_report+0x118/0x608 [ 19.193332] kasan_report+0xdc/0x128 [ 19.193403] __asan_report_load1_noabort+0x20/0x30 [ 19.193461] strnlen+0x80/0x88 [ 19.193505] kasan_strings+0x478/0xb00 [ 19.193554] kunit_try_run_case+0x170/0x3f0 [ 19.193606] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.193671] kthread+0x328/0x630 [ 19.193717] ret_from_fork+0x10/0x20 [ 19.193768] [ 19.193791] Allocated by task 259: [ 19.193830] kasan_save_stack+0x3c/0x68 [ 19.193877] kasan_save_track+0x20/0x40 [ 19.194274] kasan_save_alloc_info+0x40/0x58 [ 19.194732] __kasan_kmalloc+0xd4/0xd8 [ 19.194858] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.194932] kasan_strings+0xc8/0xb00 [ 19.195089] kunit_try_run_case+0x170/0x3f0 [ 19.195146] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.195540] kthread+0x328/0x630 [ 19.195661] ret_from_fork+0x10/0x20 [ 19.195830] [ 19.195955] Freed by task 259: [ 19.196082] kasan_save_stack+0x3c/0x68 [ 19.196165] kasan_save_track+0x20/0x40 [ 19.196400] kasan_save_free_info+0x4c/0x78 [ 19.196555] __kasan_slab_free+0x6c/0x98 [ 19.196708] kfree+0x214/0x3c8 [ 19.196881] kasan_strings+0x24c/0xb00 [ 19.196968] kunit_try_run_case+0x170/0x3f0 [ 19.197040] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.197244] kthread+0x328/0x630 [ 19.197353] ret_from_fork+0x10/0x20 [ 19.197994] [ 19.198256] The buggy address belongs to the object at fff00000c5a4d440 [ 19.198256] which belongs to the cache kmalloc-32 of size 32 [ 19.198463] The buggy address is located 16 bytes inside of [ 19.198463] freed 32-byte region [fff00000c5a4d440, fff00000c5a4d460) [ 19.198558] [ 19.198583] The buggy address belongs to the physical page: [ 19.199001] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105a4d [ 19.199085] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.199230] page_type: f5(slab) [ 19.199328] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.199554] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.199823] page dumped because: kasan: bad access detected [ 19.199877] [ 19.199989] Memory state around the buggy address: [ 19.200087] fff00000c5a4d300: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.200352] fff00000c5a4d380: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.200426] >fff00000c5a4d400: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.200665] ^ [ 19.200993] fff00000c5a4d480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.201188] fff00000c5a4d500: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.201309] ==================================================================
[ 14.480739] ================================================================== [ 14.480975] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 14.481836] Read of size 1 at addr ffff8881027b2750 by task kunit_try_catch/276 [ 14.482202] [ 14.482296] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.482339] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.482350] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.482370] Call Trace: [ 14.482384] <TASK> [ 14.482399] dump_stack_lvl+0x73/0xb0 [ 14.482428] print_report+0xd1/0x650 [ 14.482449] ? __virt_addr_valid+0x1db/0x2d0 [ 14.482472] ? strnlen+0x73/0x80 [ 14.482489] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.482515] ? strnlen+0x73/0x80 [ 14.482534] kasan_report+0x141/0x180 [ 14.482556] ? strnlen+0x73/0x80 [ 14.482579] __asan_report_load1_noabort+0x18/0x20 [ 14.482604] strnlen+0x73/0x80 [ 14.482622] kasan_strings+0x615/0xe80 [ 14.482642] ? trace_hardirqs_on+0x37/0xe0 [ 14.482664] ? __pfx_kasan_strings+0x10/0x10 [ 14.482687] ? __kasan_check_write+0x18/0x20 [ 14.482706] ? queued_spin_lock_slowpath+0x116/0xb40 [ 14.482730] ? irqentry_exit+0x2a/0x60 [ 14.482752] ? sysvec_apic_timer_interrupt+0x50/0x90 [ 14.482778] ? trace_hardirqs_on+0x37/0xe0 [ 14.482801] ? __pfx_read_tsc+0x10/0x10 [ 14.482821] ? ktime_get_ts64+0x86/0x230 [ 14.482846] kunit_try_run_case+0x1a5/0x480 [ 14.482869] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.482894] ? queued_spin_lock_slowpath+0x116/0xb40 [ 14.482918] ? __kthread_parkme+0x82/0x180 [ 14.482940] ? preempt_count_sub+0x50/0x80 [ 14.482963] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.482987] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.483012] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.483048] kthread+0x337/0x6f0 [ 14.483068] ? trace_preempt_on+0x20/0xc0 [ 14.483089] ? __pfx_kthread+0x10/0x10 [ 14.483109] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.483130] ? calculate_sigpending+0x7b/0xa0 [ 14.483153] ? __pfx_kthread+0x10/0x10 [ 14.483174] ret_from_fork+0x116/0x1d0 [ 14.483193] ? __pfx_kthread+0x10/0x10 [ 14.483214] ret_from_fork_asm+0x1a/0x30 [ 14.483245] </TASK> [ 14.483254] [ 14.491433] Allocated by task 276: [ 14.491615] kasan_save_stack+0x45/0x70 [ 14.491809] kasan_save_track+0x18/0x40 [ 14.492204] kasan_save_alloc_info+0x3b/0x50 [ 14.492392] __kasan_kmalloc+0xb7/0xc0 [ 14.492528] __kmalloc_cache_noprof+0x189/0x420 [ 14.492686] kasan_strings+0xc0/0xe80 [ 14.492938] kunit_try_run_case+0x1a5/0x480 [ 14.493168] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.493422] kthread+0x337/0x6f0 [ 14.493588] ret_from_fork+0x116/0x1d0 [ 14.493781] ret_from_fork_asm+0x1a/0x30 [ 14.494120] [ 14.494218] Freed by task 276: [ 14.494357] kasan_save_stack+0x45/0x70 [ 14.494514] kasan_save_track+0x18/0x40 [ 14.494705] kasan_save_free_info+0x3f/0x60 [ 14.494884] __kasan_slab_free+0x56/0x70 [ 14.495093] kfree+0x222/0x3f0 [ 14.495258] kasan_strings+0x2aa/0xe80 [ 14.495390] kunit_try_run_case+0x1a5/0x480 [ 14.495535] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.495709] kthread+0x337/0x6f0 [ 14.495826] ret_from_fork+0x116/0x1d0 [ 14.496164] ret_from_fork_asm+0x1a/0x30 [ 14.496433] [ 14.496527] The buggy address belongs to the object at ffff8881027b2740 [ 14.496527] which belongs to the cache kmalloc-32 of size 32 [ 14.497088] The buggy address is located 16 bytes inside of [ 14.497088] freed 32-byte region [ffff8881027b2740, ffff8881027b2760) [ 14.497437] [ 14.497508] The buggy address belongs to the physical page: [ 14.497683] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1027b2 [ 14.498484] flags: 0x200000000000000(node=0|zone=2) [ 14.498734] page_type: f5(slab) [ 14.498924] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.499296] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.499727] page dumped because: kasan: bad access detected [ 14.500000] [ 14.500099] Memory state around the buggy address: [ 14.500387] ffff8881027b2600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.500641] ffff8881027b2680: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.501157] >ffff8881027b2700: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.501385] ^ [ 14.501623] ffff8881027b2780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.502067] ffff8881027b2800: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.502301] ==================================================================