Date
June 2, 2025, 2:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.248172] ================================================================== [ 22.248795] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 22.249495] Read of size 1 at addr fff00000c6cfdcd0 by task kunit_try_catch/246 [ 22.250148] [ 22.250562] CPU: 0 UID: 0 PID: 246 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 22.250799] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.250895] Hardware name: linux,dummy-virt (DT) [ 22.250994] Call trace: [ 22.251061] dump_backtrace+0x9c/0x128 [ 22.251219] show_stack+0x20/0x38 [ 22.251321] dump_stack_lvl+0x8c/0xd0 [ 22.251403] print_report+0x118/0x5f0 [ 22.251473] kasan_report+0xdc/0x128 [ 22.251543] __asan_report_load1_noabort+0x20/0x30 [ 22.251641] strlen+0xa8/0xb0 [ 22.251728] kasan_strings+0x334/0x938 [ 22.251810] kunit_try_run_case+0x170/0x3f0 [ 22.251888] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.251991] kthread+0x24c/0x2d0 [ 22.252077] ret_from_fork+0x10/0x20 [ 22.252159] [ 22.258084] Allocated by task 246: [ 22.258427] kasan_save_stack+0x3c/0x68 [ 22.258814] kasan_save_track+0x20/0x40 [ 22.259571] kasan_save_alloc_info+0x40/0x58 [ 22.260289] __kasan_kmalloc+0xd4/0xd8 [ 22.261185] __kmalloc_cache_noprof+0x154/0x320 [ 22.262087] kasan_strings+0xb0/0x938 [ 22.262614] kunit_try_run_case+0x170/0x3f0 [ 22.263513] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.264047] kthread+0x24c/0x2d0 [ 22.264533] ret_from_fork+0x10/0x20 [ 22.264918] [ 22.265222] Freed by task 246: [ 22.265563] kasan_save_stack+0x3c/0x68 [ 22.266061] kasan_save_track+0x20/0x40 [ 22.266475] kasan_save_free_info+0x4c/0x78 [ 22.266991] __kasan_slab_free+0x6c/0x98 [ 22.267508] kfree+0x110/0x3b8 [ 22.267943] kasan_strings+0x128/0x938 [ 22.268301] kunit_try_run_case+0x170/0x3f0 [ 22.268711] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.269160] kthread+0x24c/0x2d0 [ 22.270069] ret_from_fork+0x10/0x20 [ 22.270540] [ 22.271167] The buggy address belongs to the object at fff00000c6cfdcc0 [ 22.271167] which belongs to the cache kmalloc-32 of size 32 [ 22.272697] The buggy address is located 16 bytes inside of [ 22.272697] freed 32-byte region [fff00000c6cfdcc0, fff00000c6cfdce0) [ 22.273359] [ 22.273575] The buggy address belongs to the physical page: [ 22.274167] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106cfd [ 22.275136] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.275573] page_type: f5(slab) [ 22.275895] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 22.276721] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 22.277428] page dumped because: kasan: bad access detected [ 22.278689] [ 22.278829] Memory state around the buggy address: [ 22.279009] fff00000c6cfdb80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 22.280128] fff00000c6cfdc00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 22.280964] >fff00000c6cfdc80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 22.281655] ^ [ 22.282258] fff00000c6cfdd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.282820] fff00000c6cfdd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.283638] ==================================================================
[ 14.092780] ================================================================== [ 14.092999] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 14.093125] Read of size 1 at addr ffff888102632890 by task kunit_try_catch/264 [ 14.093248] [ 14.093307] CPU: 0 UID: 0 PID: 264 Comm: kunit_try_catch Tainted: G B N 6.12.32-rc1 #1 [ 14.093346] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.093358] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.093377] Call Trace: [ 14.093392] <TASK> [ 14.093408] dump_stack_lvl+0x73/0xb0 [ 14.093429] print_report+0xd1/0x640 [ 14.093451] ? __virt_addr_valid+0x1db/0x2d0 [ 14.093472] ? strlen+0x8f/0xb0 [ 14.093489] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.093510] ? strlen+0x8f/0xb0 [ 14.093529] kasan_report+0x140/0x180 [ 14.093550] ? strlen+0x8f/0xb0 [ 14.093572] __asan_report_load1_noabort+0x18/0x20 [ 14.093591] strlen+0x8f/0xb0 [ 14.093610] kasan_strings+0x432/0xb60 [ 14.093630] ? __pfx_kasan_strings+0x10/0x10 [ 14.093650] ? __schedule+0xc49/0x27a0 [ 14.093698] ? __pfx_read_tsc+0x10/0x10 [ 14.093718] ? ktime_get_ts64+0x84/0x230 [ 14.093744] kunit_try_run_case+0x1a6/0x480 [ 14.093764] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.093783] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 14.093802] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.093825] ? __kthread_parkme+0x82/0x160 [ 14.093844] ? preempt_count_sub+0x50/0x80 [ 14.093865] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.093885] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.093919] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.093945] kthread+0x257/0x310 [ 14.093963] ? __pfx_kthread+0x10/0x10 [ 14.093983] ret_from_fork+0x41/0x80 [ 14.094002] ? __pfx_kthread+0x10/0x10 [ 14.094022] ret_from_fork_asm+0x1a/0x30 [ 14.094064] </TASK> [ 14.094078] [ 14.099513] Allocated by task 264: [ 14.099689] kasan_save_stack+0x45/0x70 [ 14.099846] kasan_save_track+0x18/0x40 [ 14.100013] kasan_save_alloc_info+0x3b/0x50 [ 14.100201] __kasan_kmalloc+0xb7/0xc0 [ 14.100384] __kmalloc_cache_noprof+0x168/0x350 [ 14.100572] kasan_strings+0xb3/0xb60 [ 14.100717] kunit_try_run_case+0x1a6/0x480 [ 14.100808] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.100911] kthread+0x257/0x310 [ 14.100986] ret_from_fork+0x41/0x80 [ 14.101085] ret_from_fork_asm+0x1a/0x30 [ 14.101172] [ 14.101220] Freed by task 264: [ 14.101289] kasan_save_stack+0x45/0x70 [ 14.101373] kasan_save_track+0x18/0x40 [ 14.101454] kasan_save_free_info+0x3f/0x60 [ 14.101549] __kasan_slab_free+0x56/0x70 [ 14.101724] kfree+0x123/0x3d0 [ 14.101894] kasan_strings+0x13a/0xb60 [ 14.102145] kunit_try_run_case+0x1a6/0x480 [ 14.102387] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.102685] kthread+0x257/0x310 [ 14.102872] ret_from_fork+0x41/0x80 [ 14.103098] ret_from_fork_asm+0x1a/0x30 [ 14.103324] [ 14.103436] The buggy address belongs to the object at ffff888102632880 [ 14.103436] which belongs to the cache kmalloc-32 of size 32 [ 14.104038] The buggy address is located 16 bytes inside of [ 14.104038] freed 32-byte region [ffff888102632880, ffff8881026328a0) [ 14.104328] [ 14.104381] The buggy address belongs to the physical page: [ 14.104503] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102632 [ 14.104913] flags: 0x200000000000000(node=0|zone=2) [ 14.105165] page_type: f5(slab) [ 14.105314] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.105539] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 14.105794] page dumped because: kasan: bad access detected [ 14.105986] [ 14.106038] Memory state around the buggy address: [ 14.106148] ffff888102632780: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.106271] ffff888102632800: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.106387] >ffff888102632880: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 14.106501] ^ [ 14.106577] ffff888102632900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.106703] ffff888102632980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.106820] ==================================================================