Date
July 3, 2025, 6:13 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 19.167006] ================================================================== [ 19.168105] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 19.168192] Read of size 1 at addr fff00000c7832b50 by task kunit_try_catch/259 [ 19.168259] [ 19.168293] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 19.168375] Tainted: [B]=BAD_PAGE, [N]=TEST [ 19.168415] Hardware name: linux,dummy-virt (DT) [ 19.168456] Call trace: [ 19.168480] show_stack+0x20/0x38 (C) [ 19.168748] dump_stack_lvl+0x8c/0xd0 [ 19.168871] print_report+0x118/0x608 [ 19.168955] kasan_report+0xdc/0x128 [ 19.169110] __asan_report_load1_noabort+0x20/0x30 [ 19.169319] strnlen+0x80/0x88 [ 19.169741] kasan_strings+0x478/0xb00 [ 19.169836] kunit_try_run_case+0x170/0x3f0 [ 19.169908] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.170260] kthread+0x328/0x630 [ 19.170462] ret_from_fork+0x10/0x20 [ 19.170831] [ 19.170954] Allocated by task 259: [ 19.171332] kasan_save_stack+0x3c/0x68 [ 19.171936] kasan_save_track+0x20/0x40 [ 19.172096] kasan_save_alloc_info+0x40/0x58 [ 19.172342] __kasan_kmalloc+0xd4/0xd8 [ 19.172479] __kmalloc_cache_noprof+0x16c/0x3c0 [ 19.172771] kasan_strings+0xc8/0xb00 [ 19.172964] kunit_try_run_case+0x170/0x3f0 [ 19.173072] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.173308] kthread+0x328/0x630 [ 19.173354] ret_from_fork+0x10/0x20 [ 19.173566] [ 19.173677] Freed by task 259: [ 19.173713] kasan_save_stack+0x3c/0x68 [ 19.174089] kasan_save_track+0x20/0x40 [ 19.174272] kasan_save_free_info+0x4c/0x78 [ 19.174426] __kasan_slab_free+0x6c/0x98 [ 19.174469] kfree+0x214/0x3c8 [ 19.174549] kasan_strings+0x24c/0xb00 [ 19.174749] kunit_try_run_case+0x170/0x3f0 [ 19.174918] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 19.175110] kthread+0x328/0x630 [ 19.175242] ret_from_fork+0x10/0x20 [ 19.175359] [ 19.175429] The buggy address belongs to the object at fff00000c7832b40 [ 19.175429] which belongs to the cache kmalloc-32 of size 32 [ 19.175639] The buggy address is located 16 bytes inside of [ 19.175639] freed 32-byte region [fff00000c7832b40, fff00000c7832b60) [ 19.175843] [ 19.175934] The buggy address belongs to the physical page: [ 19.176067] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107832 [ 19.176196] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 19.176273] page_type: f5(slab) [ 19.176489] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 19.176778] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 19.176975] page dumped because: kasan: bad access detected [ 19.177130] [ 19.177211] Memory state around the buggy address: [ 19.177275] fff00000c7832a00: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.177501] fff00000c7832a80: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.177707] >fff00000c7832b00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 19.177868] ^ [ 19.177965] fff00000c7832b80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 19.178098] fff00000c7832c00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 19.178192] ==================================================================
[ 13.419681] ================================================================== [ 13.420031] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 13.420459] Read of size 1 at addr ffff8881038e6250 by task kunit_try_catch/277 [ 13.420795] [ 13.420897] CPU: 0 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.420949] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.420962] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.420981] Call Trace: [ 13.421006] <TASK> [ 13.421019] dump_stack_lvl+0x73/0xb0 [ 13.421045] print_report+0xd1/0x650 [ 13.421069] ? __virt_addr_valid+0x1db/0x2d0 [ 13.421109] ? strnlen+0x73/0x80 [ 13.421126] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.421148] ? strnlen+0x73/0x80 [ 13.421176] kasan_report+0x141/0x180 [ 13.421208] ? strnlen+0x73/0x80 [ 13.421229] __asan_report_load1_noabort+0x18/0x20 [ 13.421253] strnlen+0x73/0x80 [ 13.421271] kasan_strings+0x615/0xe80 [ 13.421290] ? trace_hardirqs_on+0x37/0xe0 [ 13.421356] ? __pfx_kasan_strings+0x10/0x10 [ 13.421390] ? finish_task_switch.isra.0+0x153/0x700 [ 13.421412] ? __switch_to+0x47/0xf50 [ 13.421435] ? __schedule+0x10cc/0x2b60 [ 13.421457] ? __pfx_read_tsc+0x10/0x10 [ 13.421477] ? ktime_get_ts64+0x86/0x230 [ 13.421500] kunit_try_run_case+0x1a5/0x480 [ 13.421524] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.421545] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.421568] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.421590] ? __kthread_parkme+0x82/0x180 [ 13.421609] ? preempt_count_sub+0x50/0x80 [ 13.421632] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.421655] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.421677] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.421702] kthread+0x337/0x6f0 [ 13.421720] ? trace_preempt_on+0x20/0xc0 [ 13.421742] ? __pfx_kthread+0x10/0x10 [ 13.421762] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.421783] ? calculate_sigpending+0x7b/0xa0 [ 13.421807] ? __pfx_kthread+0x10/0x10 [ 13.421828] ret_from_fork+0x116/0x1d0 [ 13.421846] ? __pfx_kthread+0x10/0x10 [ 13.421866] ret_from_fork_asm+0x1a/0x30 [ 13.421895] </TASK> [ 13.421906] [ 13.429986] Allocated by task 277: [ 13.430253] kasan_save_stack+0x45/0x70 [ 13.430449] kasan_save_track+0x18/0x40 [ 13.430661] kasan_save_alloc_info+0x3b/0x50 [ 13.430861] __kasan_kmalloc+0xb7/0xc0 [ 13.431041] __kmalloc_cache_noprof+0x189/0x420 [ 13.431512] kasan_strings+0xc0/0xe80 [ 13.431724] kunit_try_run_case+0x1a5/0x480 [ 13.431906] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.432223] kthread+0x337/0x6f0 [ 13.432437] ret_from_fork+0x116/0x1d0 [ 13.432615] ret_from_fork_asm+0x1a/0x30 [ 13.432757] [ 13.432827] Freed by task 277: [ 13.432940] kasan_save_stack+0x45/0x70 [ 13.433076] kasan_save_track+0x18/0x40 [ 13.433225] kasan_save_free_info+0x3f/0x60 [ 13.433691] __kasan_slab_free+0x56/0x70 [ 13.433889] kfree+0x222/0x3f0 [ 13.434052] kasan_strings+0x2aa/0xe80 [ 13.434426] kunit_try_run_case+0x1a5/0x480 [ 13.434641] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.434893] kthread+0x337/0x6f0 [ 13.435105] ret_from_fork+0x116/0x1d0 [ 13.435349] ret_from_fork_asm+0x1a/0x30 [ 13.435550] [ 13.435657] The buggy address belongs to the object at ffff8881038e6240 [ 13.435657] which belongs to the cache kmalloc-32 of size 32 [ 13.436012] The buggy address is located 16 bytes inside of [ 13.436012] freed 32-byte region [ffff8881038e6240, ffff8881038e6260) [ 13.436540] [ 13.436650] The buggy address belongs to the physical page: [ 13.436852] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1038e6 [ 13.437094] flags: 0x200000000000000(node=0|zone=2) [ 13.437267] page_type: f5(slab) [ 13.437388] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.437984] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.438358] page dumped because: kasan: bad access detected [ 13.438617] [ 13.438712] Memory state around the buggy address: [ 13.439106] ffff8881038e6100: 00 00 00 fc fc fc fc fc 00 00 00 04 fc fc fc fc [ 13.439677] ffff8881038e6180: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.440000] >ffff8881038e6200: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.440402] ^ [ 13.440585] ffff8881038e6280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.440906] ffff8881038e6300: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 13.441329] ==================================================================