Date
June 20, 2025, 12:38 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 35.126081] ================================================================== [ 35.126269] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 35.126429] Read of size 1 at addr fff00000c7699cd0 by task kunit_try_catch/270 [ 35.126561] [ 35.126736] CPU: 0 UID: 0 PID: 270 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250620 #1 PREEMPT [ 35.127508] Tainted: [B]=BAD_PAGE, [N]=TEST [ 35.127639] Hardware name: linux,dummy-virt (DT) [ 35.127779] Call trace: [ 35.127844] show_stack+0x20/0x38 (C) [ 35.127984] dump_stack_lvl+0x8c/0xd0 [ 35.128090] print_report+0x118/0x608 [ 35.128215] kasan_report+0xdc/0x128 [ 35.128375] __asan_report_load1_noabort+0x20/0x30 [ 35.128495] strcmp+0xc0/0xc8 [ 35.128998] kasan_strings+0x340/0xb00 [ 35.129108] kunit_try_run_case+0x170/0x3f0 [ 35.129408] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 35.129527] kthread+0x328/0x630 [ 35.129671] ret_from_fork+0x10/0x20 [ 35.129778] [ 35.129825] Allocated by task 270: [ 35.129888] kasan_save_stack+0x3c/0x68 [ 35.129988] kasan_save_track+0x20/0x40 [ 35.130076] kasan_save_alloc_info+0x40/0x58 [ 35.130172] __kasan_kmalloc+0xd4/0xd8 [ 35.130318] __kmalloc_cache_noprof+0x16c/0x3c0 [ 35.130439] kasan_strings+0xc8/0xb00 [ 35.130555] kunit_try_run_case+0x170/0x3f0 [ 35.130726] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 35.130859] kthread+0x328/0x630 [ 35.130998] ret_from_fork+0x10/0x20 [ 35.131562] [ 35.132042] Freed by task 270: [ 35.132173] kasan_save_stack+0x3c/0x68 [ 35.132343] kasan_save_track+0x20/0x40 [ 35.132466] kasan_save_free_info+0x4c/0x78 [ 35.132643] __kasan_slab_free+0x6c/0x98 [ 35.132736] kfree+0x214/0x3c8 [ 35.132805] kasan_strings+0x24c/0xb00 [ 35.132886] kunit_try_run_case+0x170/0x3f0 [ 35.132977] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 35.133084] kthread+0x328/0x630 [ 35.133622] ret_from_fork+0x10/0x20 [ 35.133822] [ 35.133904] The buggy address belongs to the object at fff00000c7699cc0 [ 35.133904] which belongs to the cache kmalloc-32 of size 32 [ 35.134511] The buggy address is located 16 bytes inside of [ 35.134511] freed 32-byte region [fff00000c7699cc0, fff00000c7699ce0) [ 35.134750] [ 35.134836] The buggy address belongs to the physical page: [ 35.135338] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107699 [ 35.135524] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 35.135797] page_type: f5(slab) [ 35.136157] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 35.136385] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 35.136631] page dumped because: kasan: bad access detected [ 35.136808] [ 35.136870] Memory state around the buggy address: [ 35.137168] fff00000c7699b80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 35.137264] fff00000c7699c00: 00 00 00 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 35.137399] >fff00000c7699c80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 35.137500] ^ [ 35.137764] fff00000c7699d00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 35.137912] fff00000c7699d80: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 35.138078] ==================================================================
[ 27.826118] ================================================================== [ 27.827764] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 27.828131] Read of size 1 at addr ffff888102336390 by task kunit_try_catch/288 [ 27.828373] [ 27.828496] CPU: 0 UID: 0 PID: 288 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc2-next-20250620 #1 PREEMPT(voluntary) [ 27.828562] Tainted: [B]=BAD_PAGE, [N]=TEST [ 27.828578] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 27.828605] Call Trace: [ 27.828624] <TASK> [ 27.828649] dump_stack_lvl+0x73/0xb0 [ 27.828683] print_report+0xd1/0x650 [ 27.828714] ? __virt_addr_valid+0x1db/0x2d0 [ 27.828743] ? strcmp+0xb0/0xc0 [ 27.828766] ? kasan_complete_mode_report_info+0x64/0x200 [ 27.828796] ? strcmp+0xb0/0xc0 [ 27.828819] kasan_report+0x141/0x180 [ 27.828843] ? strcmp+0xb0/0xc0 [ 27.828871] __asan_report_load1_noabort+0x18/0x20 [ 27.828898] strcmp+0xb0/0xc0 [ 27.828923] kasan_strings+0x431/0xe80 [ 27.828946] ? trace_hardirqs_on+0x37/0xe0 [ 27.828972] ? __pfx_kasan_strings+0x10/0x10 [ 27.828995] ? finish_task_switch.isra.0+0x153/0x700 [ 27.829021] ? __switch_to+0x47/0xf50 [ 27.829050] ? __schedule+0x10cc/0x2b60 [ 27.829075] ? __pfx_read_tsc+0x10/0x10 [ 27.829100] ? ktime_get_ts64+0x86/0x230 [ 27.829130] kunit_try_run_case+0x1a5/0x480 [ 27.829747] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.829842] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 27.829902] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 27.829957] ? __kthread_parkme+0x82/0x180 [ 27.830008] ? preempt_count_sub+0x50/0x80 [ 27.830075] ? __pfx_kunit_try_run_case+0x10/0x10 [ 27.830129] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.830183] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 27.830228] kthread+0x337/0x6f0 [ 27.830263] ? trace_preempt_on+0x20/0xc0 [ 27.830305] ? __pfx_kthread+0x10/0x10 [ 27.830347] ? _raw_spin_unlock_irq+0x47/0x80 [ 27.830390] ? calculate_sigpending+0x7b/0xa0 [ 27.830435] ? __pfx_kthread+0x10/0x10 [ 27.830489] ret_from_fork+0x116/0x1d0 [ 27.830531] ? __pfx_kthread+0x10/0x10 [ 27.830572] ret_from_fork_asm+0x1a/0x30 [ 27.830637] </TASK> [ 27.830663] [ 27.841384] Allocated by task 288: [ 27.842404] kasan_save_stack+0x45/0x70 [ 27.843021] kasan_save_track+0x18/0x40 [ 27.843277] kasan_save_alloc_info+0x3b/0x50 [ 27.843705] __kasan_kmalloc+0xb7/0xc0 [ 27.844381] __kmalloc_cache_noprof+0x189/0x420 [ 27.844932] kasan_strings+0xc0/0xe80 [ 27.845160] kunit_try_run_case+0x1a5/0x480 [ 27.845332] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.845546] kthread+0x337/0x6f0 [ 27.846392] ret_from_fork+0x116/0x1d0 [ 27.846755] ret_from_fork_asm+0x1a/0x30 [ 27.847122] [ 27.847293] Freed by task 288: [ 27.847588] kasan_save_stack+0x45/0x70 [ 27.847929] kasan_save_track+0x18/0x40 [ 27.848286] kasan_save_free_info+0x3f/0x60 [ 27.848679] __kasan_slab_free+0x56/0x70 [ 27.849036] kfree+0x222/0x3f0 [ 27.849337] kasan_strings+0x2aa/0xe80 [ 27.850526] kunit_try_run_case+0x1a5/0x480 [ 27.851263] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 27.851493] kthread+0x337/0x6f0 [ 27.851829] ret_from_fork+0x116/0x1d0 [ 27.852738] ret_from_fork_asm+0x1a/0x30 [ 27.852992] [ 27.853092] The buggy address belongs to the object at ffff888102336380 [ 27.853092] which belongs to the cache kmalloc-32 of size 32 [ 27.853764] The buggy address is located 16 bytes inside of [ 27.853764] freed 32-byte region [ffff888102336380, ffff8881023363a0) [ 27.855262] [ 27.855462] The buggy address belongs to the physical page: [ 27.856267] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102336 [ 27.856685] flags: 0x200000000000000(node=0|zone=2) [ 27.857203] page_type: f5(slab) [ 27.857392] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 27.857736] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 27.858907] page dumped because: kasan: bad access detected [ 27.859252] [ 27.859419] Memory state around the buggy address: [ 27.859638] ffff888102336280: 00 00 00 04 fc fc fc fc fa fb fb fb fc fc fc fc [ 27.860204] ffff888102336300: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.860545] >ffff888102336380: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.861009] ^ [ 27.861692] ffff888102336400: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 27.862110] ffff888102336480: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 27.862763] ==================================================================