Date
June 7, 2025, 10:40 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 24.197934] ================================================================== [ 24.199329] BUG: KASAN: slab-use-after-free in strnlen+0x80/0x88 [ 24.200120] Read of size 1 at addr fff00000c41f1950 by task kunit_try_catch/247 [ 24.201656] [ 24.202155] CPU: 1 UID: 0 PID: 247 Comm: kunit_try_catch Tainted: G B N 6.12.33-rc1 #1 [ 24.202377] Tainted: [B]=BAD_PAGE, [N]=TEST [ 24.202458] Hardware name: linux,dummy-virt (DT) [ 24.202505] Call trace: [ 24.202535] dump_backtrace+0x9c/0x128 [ 24.202592] show_stack+0x20/0x38 [ 24.202637] dump_stack_lvl+0x8c/0xd0 [ 24.202686] print_report+0x118/0x5f0 [ 24.202732] kasan_report+0xdc/0x128 [ 24.202778] __asan_report_load1_noabort+0x20/0x30 [ 24.202831] strnlen+0x80/0x88 [ 24.202878] kasan_strings+0x398/0x938 [ 24.202925] kunit_try_run_case+0x170/0x3f0 [ 24.203001] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.203065] kthread+0x24c/0x2d0 [ 24.203111] ret_from_fork+0x10/0x20 [ 24.203161] [ 24.211891] Allocated by task 247: [ 24.212981] kasan_save_stack+0x3c/0x68 [ 24.214094] kasan_save_track+0x20/0x40 [ 24.214709] kasan_save_alloc_info+0x40/0x58 [ 24.215140] __kasan_kmalloc+0xd4/0xd8 [ 24.216090] __kmalloc_cache_noprof+0x154/0x320 [ 24.216945] kasan_strings+0xb0/0x938 [ 24.217514] kunit_try_run_case+0x170/0x3f0 [ 24.218136] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.218809] kthread+0x24c/0x2d0 [ 24.219316] ret_from_fork+0x10/0x20 [ 24.220329] [ 24.220476] Freed by task 247: [ 24.220657] kasan_save_stack+0x3c/0x68 [ 24.220896] kasan_save_track+0x20/0x40 [ 24.221294] kasan_save_free_info+0x4c/0x78 [ 24.221863] __kasan_slab_free+0x6c/0x98 [ 24.222638] kfree+0x110/0x3b8 [ 24.223067] kasan_strings+0x128/0x938 [ 24.223759] kunit_try_run_case+0x170/0x3f0 [ 24.224354] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 24.225036] kthread+0x24c/0x2d0 [ 24.225502] ret_from_fork+0x10/0x20 [ 24.226375] [ 24.226752] The buggy address belongs to the object at fff00000c41f1940 [ 24.226752] which belongs to the cache kmalloc-32 of size 32 [ 24.228635] The buggy address is located 16 bytes inside of [ 24.228635] freed 32-byte region [fff00000c41f1940, fff00000c41f1960) [ 24.229892] [ 24.230298] The buggy address belongs to the physical page: [ 24.230871] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1041f1 [ 24.231921] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 24.232939] page_type: f5(slab) [ 24.233497] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 24.234397] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 24.235193] page dumped because: kasan: bad access detected [ 24.236349] [ 24.236746] Memory state around the buggy address: [ 24.237420] fff00000c41f1800: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 24.238253] fff00000c41f1880: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 24.239042] >fff00000c41f1900: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 24.240039] ^ [ 24.241070] fff00000c41f1980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.241807] fff00000c41f1a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.242480] ==================================================================
[ 20.941586] ================================================================== [ 20.942247] BUG: KASAN: slab-use-after-free in strnlen+0x73/0x80 [ 20.942674] Read of size 1 at addr ffff888102af74d0 by task kunit_try_catch/264 [ 20.945100] [ 20.945303] CPU: 1 UID: 0 PID: 264 Comm: kunit_try_catch Tainted: G B N 6.12.33-rc1 #1 [ 20.945396] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.945437] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 20.945596] Call Trace: [ 20.945657] <TASK> [ 20.945712] dump_stack_lvl+0x73/0xb0 [ 20.945799] print_report+0xd1/0x640 [ 20.945883] ? __virt_addr_valid+0x1db/0x2d0 [ 20.945959] ? strnlen+0x73/0x80 [ 20.945990] ? kasan_complete_mode_report_info+0x64/0x200 [ 20.946023] ? strnlen+0x73/0x80 [ 20.946050] kasan_report+0x140/0x180 [ 20.946085] ? strnlen+0x73/0x80 [ 20.946118] __asan_report_load1_noabort+0x18/0x20 [ 20.946149] strnlen+0x73/0x80 [ 20.946179] kasan_strings+0x4cc/0xb60 [ 20.946212] ? __pfx_kasan_strings+0x10/0x10 [ 20.946273] ? __schedule+0xc49/0x27a0 [ 20.946303] ? __pfx_read_tsc+0x10/0x10 [ 20.946329] ? ktime_get_ts64+0x84/0x230 [ 20.946364] kunit_try_run_case+0x1a6/0x480 [ 20.946396] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.946424] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 20.946464] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 20.946750] ? __kthread_parkme+0x82/0x160 [ 20.946781] ? preempt_count_sub+0x50/0x80 [ 20.946818] ? __pfx_kunit_try_run_case+0x10/0x10 [ 20.946887] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 20.946926] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.946965] kthread+0x257/0x310 [ 20.946992] ? __pfx_kthread+0x10/0x10 [ 20.947018] ret_from_fork+0x41/0x80 [ 20.947048] ? __pfx_kthread+0x10/0x10 [ 20.947074] ret_from_fork_asm+0x1a/0x30 [ 20.947114] </TASK> [ 20.947128] [ 20.964351] Allocated by task 264: [ 20.965012] kasan_save_stack+0x45/0x70 [ 20.966015] kasan_save_track+0x18/0x40 [ 20.966349] kasan_save_alloc_info+0x3b/0x50 [ 20.967089] __kasan_kmalloc+0xb7/0xc0 [ 20.968046] __kmalloc_cache_noprof+0x168/0x350 [ 20.968725] kasan_strings+0xb3/0xb60 [ 20.969263] kunit_try_run_case+0x1a6/0x480 [ 20.969782] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.970596] kthread+0x257/0x310 [ 20.971049] ret_from_fork+0x41/0x80 [ 20.972034] ret_from_fork_asm+0x1a/0x30 [ 20.972453] [ 20.972970] Freed by task 264: [ 20.973671] kasan_save_stack+0x45/0x70 [ 20.974424] kasan_save_track+0x18/0x40 [ 20.975162] kasan_save_free_info+0x3f/0x60 [ 20.976118] __kasan_slab_free+0x56/0x70 [ 20.976541] kfree+0x123/0x3d0 [ 20.977325] kasan_strings+0x13a/0xb60 [ 20.978103] kunit_try_run_case+0x1a6/0x480 [ 20.979061] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 20.979483] kthread+0x257/0x310 [ 20.979833] ret_from_fork+0x41/0x80 [ 20.980453] ret_from_fork_asm+0x1a/0x30 [ 20.980947] [ 20.981190] The buggy address belongs to the object at ffff888102af74c0 [ 20.981190] which belongs to the cache kmalloc-32 of size 32 [ 20.982924] The buggy address is located 16 bytes inside of [ 20.982924] freed 32-byte region [ffff888102af74c0, ffff888102af74e0) [ 20.984450] [ 20.984650] The buggy address belongs to the physical page: [ 20.985983] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102af7 [ 20.986861] flags: 0x200000000000000(node=0|zone=2) [ 20.987292] page_type: f5(slab) [ 20.987690] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 20.988987] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 20.989879] page dumped because: kasan: bad access detected [ 20.990392] [ 20.990662] Memory state around the buggy address: [ 20.991398] ffff888102af7380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.992343] ffff888102af7400: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.992819] >ffff888102af7480: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 20.993336] ^ [ 20.993751] ffff888102af7500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.994573] ffff888102af7580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.995135] ==================================================================