Date
July 19, 2025, 11:11 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 17.560135] ================================================================== [ 17.560253] BUG: KASAN: slab-use-after-free in strlen+0xa8/0xb0 [ 17.560646] Read of size 1 at addr fff00000c77dfad0 by task kunit_try_catch/260 [ 17.560731] [ 17.560805] CPU: 1 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 17.560894] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.561099] Hardware name: linux,dummy-virt (DT) [ 17.561244] Call trace: [ 17.561310] show_stack+0x20/0x38 (C) [ 17.561385] dump_stack_lvl+0x8c/0xd0 [ 17.561435] print_report+0x118/0x5d0 [ 17.561683] kasan_report+0xdc/0x128 [ 17.561768] __asan_report_load1_noabort+0x20/0x30 [ 17.562126] strlen+0xa8/0xb0 [ 17.562296] kasan_strings+0x418/0xb00 [ 17.562561] kunit_try_run_case+0x170/0x3f0 [ 17.562630] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.562688] kthread+0x328/0x630 [ 17.562732] ret_from_fork+0x10/0x20 [ 17.562927] [ 17.562959] Allocated by task 260: [ 17.562993] kasan_save_stack+0x3c/0x68 [ 17.563038] kasan_save_track+0x20/0x40 [ 17.563092] kasan_save_alloc_info+0x40/0x58 [ 17.563136] __kasan_kmalloc+0xd4/0xd8 [ 17.563173] __kmalloc_cache_noprof+0x16c/0x3c0 [ 17.563214] kasan_strings+0xc8/0xb00 [ 17.563249] kunit_try_run_case+0x170/0x3f0 [ 17.563291] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.563336] kthread+0x328/0x630 [ 17.563371] ret_from_fork+0x10/0x20 [ 17.563409] [ 17.563439] Freed by task 260: [ 17.563474] kasan_save_stack+0x3c/0x68 [ 17.563542] kasan_save_track+0x20/0x40 [ 17.563582] kasan_save_free_info+0x4c/0x78 [ 17.563623] __kasan_slab_free+0x6c/0x98 [ 17.563671] kfree+0x214/0x3c8 [ 17.563707] kasan_strings+0x24c/0xb00 [ 17.563751] kunit_try_run_case+0x170/0x3f0 [ 17.563798] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.563842] kthread+0x328/0x630 [ 17.563901] ret_from_fork+0x10/0x20 [ 17.563937] [ 17.563967] The buggy address belongs to the object at fff00000c77dfac0 [ 17.563967] which belongs to the cache kmalloc-32 of size 32 [ 17.564027] The buggy address is located 16 bytes inside of [ 17.564027] freed 32-byte region [fff00000c77dfac0, fff00000c77dfae0) [ 17.564091] [ 17.564117] The buggy address belongs to the physical page: [ 17.564160] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1077df [ 17.564232] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 17.564289] page_type: f5(slab) [ 17.564329] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 17.564406] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 17.564462] page dumped because: kasan: bad access detected [ 17.564497] [ 17.565004] Memory state around the buggy address: [ 17.565442] fff00000c77df980: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.565641] fff00000c77dfa00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 17.565863] >fff00000c77dfa80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 17.566131] ^ [ 17.566178] fff00000c77dfb00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 17.566385] fff00000c77dfb80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 17.566562] ==================================================================
[ 14.002139] ================================================================== [ 14.002452] BUG: KASAN: slab-use-after-free in strlen+0x8f/0xb0 [ 14.002666] Read of size 1 at addr ffff8881039fe2d0 by task kunit_try_catch/277 [ 14.002988] [ 14.003304] CPU: 1 UID: 0 PID: 277 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 14.003352] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.003364] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.003384] Call Trace: [ 14.003399] <TASK> [ 14.003414] dump_stack_lvl+0x73/0xb0 [ 14.003440] print_report+0xd1/0x610 [ 14.003461] ? __virt_addr_valid+0x1db/0x2d0 [ 14.003482] ? strlen+0x8f/0xb0 [ 14.003512] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.003534] ? strlen+0x8f/0xb0 [ 14.003552] kasan_report+0x141/0x180 [ 14.003573] ? strlen+0x8f/0xb0 [ 14.003594] __asan_report_load1_noabort+0x18/0x20 [ 14.003618] strlen+0x8f/0xb0 [ 14.003636] kasan_strings+0x57b/0xe80 [ 14.003655] ? trace_hardirqs_on+0x37/0xe0 [ 14.003677] ? __pfx_kasan_strings+0x10/0x10 [ 14.003696] ? finish_task_switch.isra.0+0x153/0x700 [ 14.003719] ? __switch_to+0x47/0xf50 [ 14.003744] ? __schedule+0x10cc/0x2b60 [ 14.003766] ? __pfx_read_tsc+0x10/0x10 [ 14.003788] ? ktime_get_ts64+0x86/0x230 [ 14.003812] kunit_try_run_case+0x1a5/0x480 [ 14.003836] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.003858] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.003881] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.003905] ? __kthread_parkme+0x82/0x180 [ 14.003924] ? preempt_count_sub+0x50/0x80 [ 14.003947] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.003970] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.003994] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.004018] kthread+0x337/0x6f0 [ 14.004036] ? trace_preempt_on+0x20/0xc0 [ 14.004217] ? __pfx_kthread+0x10/0x10 [ 14.004238] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.004259] ? calculate_sigpending+0x7b/0xa0 [ 14.004283] ? __pfx_kthread+0x10/0x10 [ 14.004304] ret_from_fork+0x116/0x1d0 [ 14.004322] ? __pfx_kthread+0x10/0x10 [ 14.004342] ret_from_fork_asm+0x1a/0x30 [ 14.004371] </TASK> [ 14.004380] [ 14.011754] Allocated by task 277: [ 14.011885] kasan_save_stack+0x45/0x70 [ 14.012031] kasan_save_track+0x18/0x40 [ 14.012168] kasan_save_alloc_info+0x3b/0x50 [ 14.012316] __kasan_kmalloc+0xb7/0xc0 [ 14.012449] __kmalloc_cache_noprof+0x189/0x420 [ 14.012670] kasan_strings+0xc0/0xe80 [ 14.012853] kunit_try_run_case+0x1a5/0x480 [ 14.013298] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.013556] kthread+0x337/0x6f0 [ 14.013720] ret_from_fork+0x116/0x1d0 [ 14.013904] ret_from_fork_asm+0x1a/0x30 [ 14.014095] [ 14.014181] Freed by task 277: [ 14.014345] kasan_save_stack+0x45/0x70 [ 14.014548] kasan_save_track+0x18/0x40 [ 14.014840] kasan_save_free_info+0x3f/0x60 [ 14.014987] __kasan_slab_free+0x56/0x70 [ 14.015137] kfree+0x222/0x3f0 [ 14.015299] kasan_strings+0x2aa/0xe80 [ 14.015491] kunit_try_run_case+0x1a5/0x480 [ 14.015705] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.015959] kthread+0x337/0x6f0 [ 14.016132] ret_from_fork+0x116/0x1d0 [ 14.016309] ret_from_fork_asm+0x1a/0x30 [ 14.016515] [ 14.016602] The buggy address belongs to the object at ffff8881039fe2c0 [ 14.016602] which belongs to the cache kmalloc-32 of size 32 [ 14.017049] The buggy address is located 16 bytes inside of [ 14.017049] freed 32-byte region [ffff8881039fe2c0, ffff8881039fe2e0) [ 14.017546] [ 14.017643] The buggy address belongs to the physical page: [ 14.017864] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039fe [ 14.018179] flags: 0x200000000000000(node=0|zone=2) [ 14.018380] page_type: f5(slab) [ 14.018551] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.018843] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.019143] page dumped because: kasan: bad access detected [ 14.019373] [ 14.019445] Memory state around the buggy address: [ 14.019646] ffff8881039fe180: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 14.019865] ffff8881039fe200: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 14.020082] >ffff8881039fe280: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.020606] ^ [ 14.020868] ffff8881039fe300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.021180] ffff8881039fe380: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.021504] ==================================================================