Date
June 23, 2025, 1:39 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 28.138934] ================================================================== [ 28.139063] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 28.139251] Read of size 1 at addr fff00000c7043110 by task kunit_try_catch/261 [ 28.139460] [ 28.139546] CPU: 0 UID: 0 PID: 261 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc1 #1 PREEMPT [ 28.140438] Tainted: [B]=BAD_PAGE, [N]=TEST [ 28.140671] Hardware name: linux,dummy-virt (DT) [ 28.140895] Call trace: [ 28.141023] show_stack+0x20/0x38 (C) [ 28.141154] dump_stack_lvl+0x8c/0xd0 [ 28.141302] print_report+0x118/0x608 [ 28.141661] kasan_report+0xdc/0x128 [ 28.141853] __asan_report_load1_noabort+0x20/0x30 [ 28.142156] strlen+0xa8/0xb0 [ 28.142272] kasan_strings+0x418/0xb00 [ 28.142685] kunit_try_run_case+0x170/0x3f0 [ 28.143019] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.143240] kthread+0x328/0x630 [ 28.143676] ret_from_fork+0x10/0x20 [ 28.143989] [ 28.144078] Allocated by task 261: [ 28.144160] kasan_save_stack+0x3c/0x68 [ 28.144277] kasan_save_track+0x20/0x40 [ 28.144470] kasan_save_alloc_info+0x40/0x58 [ 28.144589] __kasan_kmalloc+0xd4/0xd8 [ 28.145009] __kmalloc_cache_noprof+0x16c/0x3c0 [ 28.145269] kasan_strings+0xc8/0xb00 [ 28.145381] kunit_try_run_case+0x170/0x3f0 [ 28.145502] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.145623] kthread+0x328/0x630 [ 28.145736] ret_from_fork+0x10/0x20 [ 28.145881] [ 28.146300] Freed by task 261: [ 28.146519] kasan_save_stack+0x3c/0x68 [ 28.146635] kasan_save_track+0x20/0x40 [ 28.146823] kasan_save_free_info+0x4c/0x78 [ 28.147447] __kasan_slab_free+0x6c/0x98 [ 28.147571] kfree+0x214/0x3c8 [ 28.147667] kasan_strings+0x24c/0xb00 [ 28.147774] kunit_try_run_case+0x170/0x3f0 [ 28.147884] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.148354] kthread+0x328/0x630 [ 28.148623] ret_from_fork+0x10/0x20 [ 28.148726] [ 28.148879] The buggy address belongs to the object at fff00000c7043100 [ 28.148879] which belongs to the cache kmalloc-32 of size 32 [ 28.149032] The buggy address is located 16 bytes inside of [ 28.149032] freed 32-byte region [fff00000c7043100, fff00000c7043120) [ 28.149200] [ 28.149353] The buggy address belongs to the physical page: [ 28.149452] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107043 [ 28.149632] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 28.150127] page_type: f5(slab) [ 28.150617] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 28.150769] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 28.150927] page dumped because: kasan: bad access detected [ 28.151040] [ 28.151100] Memory state around the buggy address: [ 28.151197] fff00000c7043000: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 28.151624] fff00000c7043080: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 28.151827] >fff00000c7043100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 28.151935] ^ [ 28.152068] fff00000c7043180: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 28.152184] fff00000c7043200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 28.152284] ==================================================================
[ 20.215545] ================================================================== [ 20.216162] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 20.217131] Read of size 1 at addr ffff88810a08ac10 by task kunit_try_catch/280 [ 20.217783] [ 20.218032] CPU: 1 UID: 0 PID: 280 Comm: kunit_try_catch Tainted: G B N 6.15.4-rc1 #1 PREEMPT(voluntary) [ 20.218150] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.218190] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 20.218291] Call Trace: [ 20.218340] <TASK> [ 20.218379] dump_stack_lvl+0x73/0xb0 [ 20.218449] print_report+0xd1/0x650 [ 20.218526] ? __virt_addr_valid+0x1db/0x2d0 [ 20.218600] ? strlen+0x8f/0xb0 [ 20.218686] ? kasan_complete_mode_report_info+0x64/0x200 [ 20.218764] ? strlen+0x8f/0xb0 [ 20.218832] kasan_report+0x141/0x180 [ 20.218905] ? strlen+0x8f/0xb0 [ 20.218991] __asan_report_load1_noabort+0x18/0x20 [ 20.219067] strlen+0x8f/0xb0 [ 20.219139] kasan_strings+0x57b/0xe80 [ 20.219250] ? trace_hardirqs_on+0x37/0xe0 [ 20.219333] ? __pfx_kasan_strings+0x10/0x10 [ 20.219406] ? finish_task_switch.isra.0+0x153/0x700 [ 20.219476] ? __switch_to+0x5d9/0xf60 [ 20.219524] ? dequeue_task_fair+0x166/0x4e0 [ 20.219561] ? __schedule+0x10cc/0x2b60 [ 20.219594] ? __pfx_read_tsc+0x10/0x10 [ 20.219649] ? ktime_get_ts64+0x86/0x230 [ 20.219687] kunit_try_run_case+0x1a5/0x480 [ 20.219725] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.219759] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 20.219793] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 20.219827] ? __kthread_parkme+0x82/0x180 [ 20.219858] ? preempt_count_sub+0x50/0x80 [ 20.219894] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.219929] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.219962] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 20.219996] kthread+0x337/0x6f0 [ 20.220018] ? trace_preempt_on+0x20/0xc0 [ 20.220051] ? __pfx_kthread+0x10/0x10 [ 20.220075] ? _raw_spin_unlock_irq+0x47/0x80 [ 20.220106] ? calculate_sigpending+0x7b/0xa0 [ 20.220135] ? __pfx_kthread+0x10/0x10 [ 20.220159] ret_from_fork+0x41/0x80 [ 20.220190] ? __pfx_kthread+0x10/0x10 [ 20.220261] ret_from_fork_asm+0x1a/0x30 [ 20.220310] </TASK> [ 20.220324] [ 20.236970] Allocated by task 280: [ 20.237392] kasan_save_stack+0x45/0x70 [ 20.237817] kasan_save_track+0x18/0x40 [ 20.238199] kasan_save_alloc_info+0x3b/0x50 [ 20.238590] __kasan_kmalloc+0xb7/0xc0 [ 20.238913] __kmalloc_cache_noprof+0x189/0x420 [ 20.239253] kasan_strings+0xc0/0xe80 [ 20.239551] kunit_try_run_case+0x1a5/0x480 [ 20.240059] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.240649] kthread+0x337/0x6f0 [ 20.241052] ret_from_fork+0x41/0x80 [ 20.241595] ret_from_fork_asm+0x1a/0x30 [ 20.242058] [ 20.242339] Freed by task 280: [ 20.242680] kasan_save_stack+0x45/0x70 [ 20.243182] kasan_save_track+0x18/0x40 [ 20.243593] kasan_save_free_info+0x3f/0x60 [ 20.244005] __kasan_slab_free+0x56/0x70 [ 20.244673] kfree+0x222/0x3f0 [ 20.245579] kasan_strings+0x2aa/0xe80 [ 20.246686] kunit_try_run_case+0x1a5/0x480 [ 20.247090] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.247589] kthread+0x337/0x6f0 [ 20.247958] ret_from_fork+0x41/0x80 [ 20.248368] ret_from_fork_asm+0x1a/0x30 [ 20.248875] [ 20.249128] The buggy address belongs to the object at ffff88810a08ac00 [ 20.249128] which belongs to the cache kmalloc-32 of size 32 [ 20.250255] The buggy address is located 16 bytes inside of [ 20.250255] freed 32-byte region [ffff88810a08ac00, ffff88810a08ac20) [ 20.251390] [ 20.251576] The buggy address belongs to the physical page: [ 20.252003] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10a08a [ 20.252744] flags: 0x200000000000000(node=0|zone=2) [ 20.253571] page_type: f5(slab) [ 20.253927] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 20.254590] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.255425] page dumped because: kasan: bad access detected [ 20.255873] [ 20.256096] Memory state around the buggy address: [ 20.256845] ffff88810a08ab00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.257408] ffff88810a08ab80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.258053] >ffff88810a08ac00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.258705] ^ [ 20.259089] ffff88810a08ac80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.259787] ffff88810a08ad00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.260438] ==================================================================