Date
July 9, 2025, 11:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.858786] ================================================================== [ 18.858846] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 18.858901] Read of size 1 at addr fff00000c6460590 by task kunit_try_catch/259 [ 18.858992] [ 18.859039] CPU: 0 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 18.859148] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.859179] Hardware name: linux,dummy-virt (DT) [ 18.859213] Call trace: [ 18.859248] show_stack+0x20/0x38 (C) [ 18.859302] dump_stack_lvl+0x8c/0xd0 [ 18.859352] print_report+0x118/0x608 [ 18.859402] kasan_report+0xdc/0x128 [ 18.859452] __asan_report_load1_noabort+0x20/0x30 [ 18.859509] strlen+0xa8/0xb0 [ 18.859553] kasan_strings+0x418/0xb00 [ 18.859600] kunit_try_run_case+0x170/0x3f0 [ 18.859657] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.859711] kthread+0x328/0x630 [ 18.859766] ret_from_fork+0x10/0x20 [ 18.859817] [ 18.859838] Allocated by task 259: [ 18.859868] kasan_save_stack+0x3c/0x68 [ 18.859909] kasan_save_track+0x20/0x40 [ 18.859949] kasan_save_alloc_info+0x40/0x58 [ 18.860000] __kasan_kmalloc+0xd4/0xd8 [ 18.860047] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.860087] kasan_strings+0xc8/0xb00 [ 18.860142] kunit_try_run_case+0x170/0x3f0 [ 18.860181] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.860227] kthread+0x328/0x630 [ 18.860262] ret_from_fork+0x10/0x20 [ 18.860300] [ 18.860320] Freed by task 259: [ 18.860357] kasan_save_stack+0x3c/0x68 [ 18.860405] kasan_save_track+0x20/0x40 [ 18.860450] kasan_save_free_info+0x4c/0x78 [ 18.860491] __kasan_slab_free+0x6c/0x98 [ 18.860530] kfree+0x214/0x3c8 [ 18.860565] kasan_strings+0x24c/0xb00 [ 18.860603] kunit_try_run_case+0x170/0x3f0 [ 18.860641] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.860686] kthread+0x328/0x630 [ 18.860719] ret_from_fork+0x10/0x20 [ 18.860757] [ 18.860778] The buggy address belongs to the object at fff00000c6460580 [ 18.860778] which belongs to the cache kmalloc-32 of size 32 [ 18.860837] The buggy address is located 16 bytes inside of [ 18.860837] freed 32-byte region [fff00000c6460580, fff00000c64605a0) [ 18.860909] [ 18.860936] The buggy address belongs to the physical page: [ 18.860970] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106460 [ 18.861026] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.861080] page_type: f5(slab) [ 18.861599] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 18.862082] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 18.862182] page dumped because: kasan: bad access detected [ 18.862218] [ 18.862270] Memory state around the buggy address: [ 18.862344] fff00000c6460480: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.862415] fff00000c6460500: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.862484] >fff00000c6460580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.862641] ^ [ 18.862789] fff00000c6460600: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.863192] fff00000c6460680: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 18.863276] ==================================================================
[ 14.496898] ================================================================== [ 14.497235] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 14.497497] Read of size 1 at addr ffff8881032060d0 by task kunit_try_catch/276 [ 14.497825] [ 14.497918] CPU: 0 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 14.497959] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.497970] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.497991] Call Trace: [ 14.498006] <TASK> [ 14.498020] dump_stack_lvl+0x73/0xb0 [ 14.498595] print_report+0xd1/0x650 [ 14.498633] ? __virt_addr_valid+0x1db/0x2d0 [ 14.498656] ? strlen+0x8f/0xb0 [ 14.498673] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.498698] ? strlen+0x8f/0xb0 [ 14.498730] kasan_report+0x141/0x180 [ 14.498753] ? strlen+0x8f/0xb0 [ 14.498775] __asan_report_load1_noabort+0x18/0x20 [ 14.498800] strlen+0x8f/0xb0 [ 14.498817] kasan_strings+0x57b/0xe80 [ 14.498837] ? trace_hardirqs_on+0x37/0xe0 [ 14.498860] ? __pfx_kasan_strings+0x10/0x10 [ 14.498882] ? finish_task_switch.isra.0+0x153/0x700 [ 14.498904] ? __switch_to+0x47/0xf50 [ 14.498929] ? __schedule+0x10cc/0x2b60 [ 14.498950] ? __pfx_read_tsc+0x10/0x10 [ 14.498971] ? ktime_get_ts64+0x86/0x230 [ 14.498994] kunit_try_run_case+0x1a5/0x480 [ 14.499018] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.499110] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.499138] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.499162] ? __kthread_parkme+0x82/0x180 [ 14.499183] ? preempt_count_sub+0x50/0x80 [ 14.499206] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.499232] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.499258] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.499284] kthread+0x337/0x6f0 [ 14.499302] ? trace_preempt_on+0x20/0xc0 [ 14.499325] ? __pfx_kthread+0x10/0x10 [ 14.499346] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.499368] ? calculate_sigpending+0x7b/0xa0 [ 14.499392] ? __pfx_kthread+0x10/0x10 [ 14.499413] ret_from_fork+0x116/0x1d0 [ 14.499431] ? __pfx_kthread+0x10/0x10 [ 14.499451] ret_from_fork_asm+0x1a/0x30 [ 14.499482] </TASK> [ 14.499491] [ 14.510183] Allocated by task 276: [ 14.510523] kasan_save_stack+0x45/0x70 [ 14.510686] kasan_save_track+0x18/0x40 [ 14.510999] kasan_save_alloc_info+0x3b/0x50 [ 14.511236] __kasan_kmalloc+0xb7/0xc0 [ 14.511410] __kmalloc_cache_noprof+0x189/0x420 [ 14.511615] kasan_strings+0xc0/0xe80 [ 14.511797] kunit_try_run_case+0x1a5/0x480 [ 14.511988] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.512607] kthread+0x337/0x6f0 [ 14.512791] ret_from_fork+0x116/0x1d0 [ 14.512935] ret_from_fork_asm+0x1a/0x30 [ 14.513358] [ 14.513445] Freed by task 276: [ 14.513758] kasan_save_stack+0x45/0x70 [ 14.513963] kasan_save_track+0x18/0x40 [ 14.514311] kasan_save_free_info+0x3f/0x60 [ 14.514669] __kasan_slab_free+0x56/0x70 [ 14.514830] kfree+0x222/0x3f0 [ 14.515272] kasan_strings+0x2aa/0xe80 [ 14.515429] kunit_try_run_case+0x1a5/0x480 [ 14.515810] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.516064] kthread+0x337/0x6f0 [ 14.516356] ret_from_fork+0x116/0x1d0 [ 14.516550] ret_from_fork_asm+0x1a/0x30 [ 14.516894] [ 14.516972] The buggy address belongs to the object at ffff8881032060c0 [ 14.516972] which belongs to the cache kmalloc-32 of size 32 [ 14.517848] The buggy address is located 16 bytes inside of [ 14.517848] freed 32-byte region [ffff8881032060c0, ffff8881032060e0) [ 14.518486] [ 14.518591] The buggy address belongs to the physical page: [ 14.518985] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103206 [ 14.519623] flags: 0x200000000000000(node=0|zone=2) [ 14.519879] page_type: f5(slab) [ 14.520033] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.520601] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.520993] page dumped because: kasan: bad access detected [ 14.521402] [ 14.521485] Memory state around the buggy address: [ 14.521688] ffff888103205f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.522204] ffff888103206000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.522612] >ffff888103206080: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.522985] ^ [ 14.523511] ffff888103206100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.523852] ffff888103206180: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.524531] ==================================================================