Date
July 20, 2025, 8:11 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 17.480611] ================================================================== [ 17.480782] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 17.480857] Read of size 1 at addr fff00000c767da50 by task kunit_try_catch/260 [ 17.481167] [ 17.481220] CPU: 0 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 17.481597] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.481665] Hardware name: linux,dummy-virt (DT) [ 17.481724] Call trace: [ 17.482011] show_stack+0x20/0x38 (C) [ 17.482518] dump_stack_lvl+0x8c/0xd0 [ 17.482607] print_report+0x118/0x5d0 [ 17.483219] kasan_report+0xdc/0x128 [ 17.483305] __asan_report_load1_noabort+0x20/0x30 [ 17.483397] strlen+0xa8/0xb0 [ 17.483589] kasan_strings+0x418/0xb00 [ 17.483978] kunit_try_run_case+0x170/0x3f0 [ 17.484144] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.484299] kthread+0x328/0x630 [ 17.484387] ret_from_fork+0x10/0x20 [ 17.484479] [ 17.484579] Allocated by task 260: [ 17.484657] kasan_save_stack+0x3c/0x68 [ 17.484864] kasan_save_track+0x20/0x40 [ 17.485076] kasan_save_alloc_info+0x40/0x58 [ 17.485171] __kasan_kmalloc+0xd4/0xd8 [ 17.485289] __kmalloc_cache_noprof+0x16c/0x3c0 [ 17.485348] kasan_strings+0xc8/0xb00 [ 17.485682] kunit_try_run_case+0x170/0x3f0 [ 17.485831] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.485976] kthread+0x328/0x630 [ 17.486065] ret_from_fork+0x10/0x20 [ 17.486123] [ 17.486404] Freed by task 260: [ 17.486471] kasan_save_stack+0x3c/0x68 [ 17.486518] kasan_save_track+0x20/0x40 [ 17.486857] kasan_save_free_info+0x4c/0x78 [ 17.486931] __kasan_slab_free+0x6c/0x98 [ 17.487035] kfree+0x214/0x3c8 [ 17.487074] kasan_strings+0x24c/0xb00 [ 17.487157] kunit_try_run_case+0x170/0x3f0 [ 17.487482] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.487758] kthread+0x328/0x630 [ 17.487829] ret_from_fork+0x10/0x20 [ 17.487941] [ 17.487993] The buggy address belongs to the object at fff00000c767da40 [ 17.487993] which belongs to the cache kmalloc-32 of size 32 [ 17.488065] The buggy address is located 16 bytes inside of [ 17.488065] freed 32-byte region [fff00000c767da40, fff00000c767da60) [ 17.488140] [ 17.488196] The buggy address belongs to the physical page: [ 17.488231] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10767d [ 17.488292] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 17.488344] page_type: f5(slab) [ 17.488383] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 17.488454] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 17.488507] page dumped because: kasan: bad access detected [ 17.488551] [ 17.488572] Memory state around the buggy address: [ 17.488614] fff00000c767d900: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.488669] fff00000c767d980: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.488716] >fff00000c767da00: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 17.488766] ^ [ 17.488821] fff00000c767da80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 17.488906] fff00000c767db00: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 17.489497] ==================================================================
[ 14.932245] ================================================================== [ 14.932606] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 14.932948] Read of size 1 at addr ffff8881038b6250 by task kunit_try_catch/277 [ 14.933390] [ 14.933500] CPU: 1 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 14.933545] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.933557] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.933578] Call Trace: [ 14.933593] <TASK> [ 14.933607] dump_stack_lvl+0x73/0xb0 [ 14.933636] print_report+0xd1/0x610 [ 14.933660] ? __virt_addr_valid+0x1db/0x2d0 [ 14.933683] ? strlen+0x8f/0xb0 [ 14.933700] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.933723] ? strlen+0x8f/0xb0 [ 14.933742] kasan_report+0x141/0x180 [ 14.933765] ? strlen+0x8f/0xb0 [ 14.933790] __asan_report_load1_noabort+0x18/0x20 [ 14.933814] strlen+0x8f/0xb0 [ 14.933834] kasan_strings+0x57b/0xe80 [ 14.933854] ? trace_hardirqs_on+0x37/0xe0 [ 14.933878] ? __pfx_kasan_strings+0x10/0x10 [ 14.933898] ? finish_task_switch.isra.0+0x153/0x700 [ 14.933920] ? __switch_to+0x47/0xf50 [ 14.933948] ? __schedule+0x10c6/0x2b60 [ 14.933972] ? __pfx_read_tsc+0x10/0x10 [ 14.933993] ? ktime_get_ts64+0x86/0x230 [ 14.934019] kunit_try_run_case+0x1a5/0x480 [ 14.934044] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.934067] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.934091] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.934124] ? __kthread_parkme+0x82/0x180 [ 14.934145] ? preempt_count_sub+0x50/0x80 [ 14.934170] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.934194] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.934218] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.934242] kthread+0x337/0x6f0 [ 14.934262] ? trace_preempt_on+0x20/0xc0 [ 14.934285] ? __pfx_kthread+0x10/0x10 [ 14.934307] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.934329] ? calculate_sigpending+0x7b/0xa0 [ 14.934354] ? __pfx_kthread+0x10/0x10 [ 14.934376] ret_from_fork+0x116/0x1d0 [ 14.934394] ? __pfx_kthread+0x10/0x10 [ 14.934415] ret_from_fork_asm+0x1a/0x30 [ 14.934450] </TASK> [ 14.934460] [ 14.943001] Allocated by task 277: [ 14.943379] kasan_save_stack+0x45/0x70 [ 14.943605] kasan_save_track+0x18/0x40 [ 14.943766] kasan_save_alloc_info+0x3b/0x50 [ 14.944068] __kasan_kmalloc+0xb7/0xc0 [ 14.944226] __kmalloc_cache_noprof+0x189/0x420 [ 14.944388] kasan_strings+0xc0/0xe80 [ 14.944537] kunit_try_run_case+0x1a5/0x480 [ 14.944691] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.944872] kthread+0x337/0x6f0 [ 14.945044] ret_from_fork+0x116/0x1d0 [ 14.945235] ret_from_fork_asm+0x1a/0x30 [ 14.945431] [ 14.945536] Freed by task 277: [ 14.945695] kasan_save_stack+0x45/0x70 [ 14.945888] kasan_save_track+0x18/0x40 [ 14.946084] kasan_save_free_info+0x3f/0x60 [ 14.946297] __kasan_slab_free+0x56/0x70 [ 14.946729] kfree+0x222/0x3f0 [ 14.946952] kasan_strings+0x2aa/0xe80 [ 14.947239] kunit_try_run_case+0x1a5/0x480 [ 14.947415] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.947687] kthread+0x337/0x6f0 [ 14.947887] ret_from_fork+0x116/0x1d0 [ 14.948055] ret_from_fork_asm+0x1a/0x30 [ 14.948245] [ 14.948323] The buggy address belongs to the object at ffff8881038b6240 [ 14.948323] which belongs to the cache kmalloc-32 of size 32 [ 14.949037] The buggy address is located 16 bytes inside of [ 14.949037] freed 32-byte region [ffff8881038b6240, ffff8881038b6260) [ 14.949567] [ 14.949674] The buggy address belongs to the physical page: [ 14.949987] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1038b6 [ 14.950548] flags: 0x200000000000000(node=0|zone=2) [ 14.950747] page_type: f5(slab) [ 14.951029] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.951334] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.951582] page dumped because: kasan: bad access detected [ 14.951763] [ 14.951996] Memory state around the buggy address: [ 14.952306] ffff8881038b6100: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.952648] ffff8881038b6180: 00 00 00 04 fc fc fc fc fa fb fb fb fc fc fc fc [ 14.953014] >ffff8881038b6200: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.953347] ^ [ 14.953591] ffff8881038b6280: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.953903] ffff8881038b6300: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.954430] ==================================================================