Date
July 15, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 17.748125] ================================================================== [ 17.748189] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 17.748242] Read of size 1 at addr fff00000c5977b10 by task kunit_try_catch/260 [ 17.748428] [ 17.748774] CPU: 1 UID: 0 PID: 260 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 17.749495] Tainted: [B]=BAD_PAGE, [N]=TEST [ 17.749531] Hardware name: linux,dummy-virt (DT) [ 17.749564] Call trace: [ 17.749589] show_stack+0x20/0x38 (C) [ 17.749645] dump_stack_lvl+0x8c/0xd0 [ 17.749694] print_report+0x118/0x5d0 [ 17.749743] kasan_report+0xdc/0x128 [ 17.749790] __asan_report_load1_noabort+0x20/0x30 [ 17.749844] strcmp+0xc0/0xc8 [ 17.749885] kasan_strings+0x340/0xb00 [ 17.749931] kunit_try_run_case+0x170/0x3f0 [ 17.749981] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.750036] kthread+0x328/0x630 [ 17.750080] ret_from_fork+0x10/0x20 [ 17.750129] [ 17.750151] Allocated by task 260: [ 17.750197] kasan_save_stack+0x3c/0x68 [ 17.750241] kasan_save_track+0x20/0x40 [ 17.750279] kasan_save_alloc_info+0x40/0x58 [ 17.750323] __kasan_kmalloc+0xd4/0xd8 [ 17.750364] __kmalloc_cache_noprof+0x16c/0x3c0 [ 17.750407] kasan_strings+0xc8/0xb00 [ 17.750444] kunit_try_run_case+0x170/0x3f0 [ 17.750484] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.750573] kthread+0x328/0x630 [ 17.750632] ret_from_fork+0x10/0x20 [ 17.750671] [ 17.750691] Freed by task 260: [ 17.750742] kasan_save_stack+0x3c/0x68 [ 17.750783] kasan_save_track+0x20/0x40 [ 17.750822] kasan_save_free_info+0x4c/0x78 [ 17.750864] __kasan_slab_free+0x6c/0x98 [ 17.750904] kfree+0x214/0x3c8 [ 17.750938] kasan_strings+0x24c/0xb00 [ 17.750974] kunit_try_run_case+0x170/0x3f0 [ 17.751013] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 17.751079] kthread+0x328/0x630 [ 17.751113] ret_from_fork+0x10/0x20 [ 17.751151] [ 17.751172] The buggy address belongs to the object at fff00000c5977b00 [ 17.751172] which belongs to the cache kmalloc-32 of size 32 [ 17.751243] The buggy address is located 16 bytes inside of [ 17.751243] freed 32-byte region [fff00000c5977b00, fff00000c5977b20) [ 17.751307] [ 17.751329] The buggy address belongs to the physical page: [ 17.751362] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105977 [ 17.751417] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 17.751505] page_type: f5(slab) [ 17.751547] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 17.751675] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 17.751809] page dumped because: kasan: bad access detected [ 17.751871] [ 17.751912] Memory state around the buggy address: [ 17.751959] fff00000c5977a00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.752011] fff00000c5977a80: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.752066] >fff00000c5977b00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 17.752107] ^ [ 17.752205] fff00000c5977b80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 17.752321] fff00000c5977c00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 17.752669] ==================================================================
[ 14.440444] ================================================================== [ 14.441321] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 14.441670] Read of size 1 at addr ffff8881038e8050 by task kunit_try_catch/276 [ 14.441987] [ 14.442100] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 14.442146] Tainted: [B]=BAD_PAGE, [N]=TEST [ 14.442158] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 14.442180] Call Trace: [ 14.442191] <TASK> [ 14.442207] dump_stack_lvl+0x73/0xb0 [ 14.442236] print_report+0xd1/0x610 [ 14.442259] ? __virt_addr_valid+0x1db/0x2d0 [ 14.442283] ? strcmp+0xb0/0xc0 [ 14.442299] ? kasan_complete_mode_report_info+0x64/0x200 [ 14.442323] ? strcmp+0xb0/0xc0 [ 14.442341] kasan_report+0x141/0x180 [ 14.442363] ? strcmp+0xb0/0xc0 [ 14.442391] __asan_report_load1_noabort+0x18/0x20 [ 14.442417] strcmp+0xb0/0xc0 [ 14.442436] kasan_strings+0x431/0xe80 [ 14.442475] ? trace_hardirqs_on+0x37/0xe0 [ 14.442499] ? __pfx_kasan_strings+0x10/0x10 [ 14.442520] ? finish_task_switch.isra.0+0x153/0x700 [ 14.442544] ? __switch_to+0x47/0xf50 [ 14.442570] ? __schedule+0x10cc/0x2b60 [ 14.442593] ? __pfx_read_tsc+0x10/0x10 [ 14.442614] ? ktime_get_ts64+0x86/0x230 [ 14.442639] kunit_try_run_case+0x1a5/0x480 [ 14.442665] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.442688] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 14.442713] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 14.442738] ? __kthread_parkme+0x82/0x180 [ 14.442771] ? preempt_count_sub+0x50/0x80 [ 14.442795] ? __pfx_kunit_try_run_case+0x10/0x10 [ 14.442820] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.442845] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 14.442871] kthread+0x337/0x6f0 [ 14.442892] ? trace_preempt_on+0x20/0xc0 [ 14.442914] ? __pfx_kthread+0x10/0x10 [ 14.442935] ? _raw_spin_unlock_irq+0x47/0x80 [ 14.442957] ? calculate_sigpending+0x7b/0xa0 [ 14.442981] ? __pfx_kthread+0x10/0x10 [ 14.443002] ret_from_fork+0x116/0x1d0 [ 14.443022] ? __pfx_kthread+0x10/0x10 [ 14.443042] ret_from_fork_asm+0x1a/0x30 [ 14.443075] </TASK> [ 14.443085] [ 14.450676] Allocated by task 276: [ 14.450872] kasan_save_stack+0x45/0x70 [ 14.451072] kasan_save_track+0x18/0x40 [ 14.451268] kasan_save_alloc_info+0x3b/0x50 [ 14.451635] __kasan_kmalloc+0xb7/0xc0 [ 14.451815] __kmalloc_cache_noprof+0x189/0x420 [ 14.452006] kasan_strings+0xc0/0xe80 [ 14.452198] kunit_try_run_case+0x1a5/0x480 [ 14.452457] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.452683] kthread+0x337/0x6f0 [ 14.452860] ret_from_fork+0x116/0x1d0 [ 14.453034] ret_from_fork_asm+0x1a/0x30 [ 14.453217] [ 14.453294] Freed by task 276: [ 14.453508] kasan_save_stack+0x45/0x70 [ 14.453648] kasan_save_track+0x18/0x40 [ 14.453793] kasan_save_free_info+0x3f/0x60 [ 14.453944] __kasan_slab_free+0x56/0x70 [ 14.454079] kfree+0x222/0x3f0 [ 14.454229] kasan_strings+0x2aa/0xe80 [ 14.454602] kunit_try_run_case+0x1a5/0x480 [ 14.454833] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 14.455087] kthread+0x337/0x6f0 [ 14.455256] ret_from_fork+0x116/0x1d0 [ 14.455397] ret_from_fork_asm+0x1a/0x30 [ 14.455535] [ 14.455605] The buggy address belongs to the object at ffff8881038e8040 [ 14.455605] which belongs to the cache kmalloc-32 of size 32 [ 14.456078] The buggy address is located 16 bytes inside of [ 14.456078] freed 32-byte region [ffff8881038e8040, ffff8881038e8060) [ 14.456809] [ 14.456893] The buggy address belongs to the physical page: [ 14.457127] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1038e8 [ 14.457463] flags: 0x200000000000000(node=0|zone=2) [ 14.457736] page_type: f5(slab) [ 14.457912] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 14.458175] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 14.458405] page dumped because: kasan: bad access detected [ 14.458643] [ 14.458739] Memory state around the buggy address: [ 14.458974] ffff8881038e7f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.459362] ffff8881038e7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.459685] >ffff8881038e8000: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 14.460015] ^ [ 14.460237] ffff8881038e8080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.460579] ffff8881038e8100: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 14.460807] ==================================================================