Date
July 6, 2025, 11:09 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 20.482597] ================================================================== [ 20.482773] BUG: KASAN: slab-use-after-free in strcmp+0xc0/0xc8 [ 20.482978] Read of size 1 at addr fff00000c56d5090 by task kunit_try_catch/259 [ 20.483263] [ 20.483314] CPU: 1 UID: 0 PID: 259 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 20.483403] Tainted: [B]=BAD_PAGE, [N]=TEST [ 20.483459] Hardware name: linux,dummy-virt (DT) [ 20.483502] Call trace: [ 20.483536] show_stack+0x20/0x38 (C) [ 20.483591] dump_stack_lvl+0x8c/0xd0 [ 20.483641] print_report+0x118/0x608 [ 20.483691] kasan_report+0xdc/0x128 [ 20.483739] __asan_report_load1_noabort+0x20/0x30 [ 20.483801] strcmp+0xc0/0xc8 [ 20.483847] kasan_strings+0x340/0xb00 [ 20.483894] kunit_try_run_case+0x170/0x3f0 [ 20.483945] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.483999] kthread+0x328/0x630 [ 20.484053] ret_from_fork+0x10/0x20 [ 20.484102] [ 20.484123] Allocated by task 259: [ 20.484163] kasan_save_stack+0x3c/0x68 [ 20.484228] kasan_save_track+0x20/0x40 [ 20.484267] kasan_save_alloc_info+0x40/0x58 [ 20.484326] __kasan_kmalloc+0xd4/0xd8 [ 20.484365] __kmalloc_cache_noprof+0x16c/0x3c0 [ 20.484408] kasan_strings+0xc8/0xb00 [ 20.484455] kunit_try_run_case+0x170/0x3f0 [ 20.484508] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.484553] kthread+0x328/0x630 [ 20.484592] ret_from_fork+0x10/0x20 [ 20.484629] [ 20.484649] Freed by task 259: [ 20.484690] kasan_save_stack+0x3c/0x68 [ 20.484730] kasan_save_track+0x20/0x40 [ 20.484778] kasan_save_free_info+0x4c/0x78 [ 20.484818] __kasan_slab_free+0x6c/0x98 [ 20.484858] kfree+0x214/0x3c8 [ 20.484906] kasan_strings+0x24c/0xb00 [ 20.484944] kunit_try_run_case+0x170/0x3f0 [ 20.484983] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 20.485037] kthread+0x328/0x630 [ 20.485072] ret_from_fork+0x10/0x20 [ 20.485108] [ 20.485153] The buggy address belongs to the object at fff00000c56d5080 [ 20.485153] which belongs to the cache kmalloc-32 of size 32 [ 20.485692] The buggy address is located 16 bytes inside of [ 20.485692] freed 32-byte region [fff00000c56d5080, fff00000c56d50a0) [ 20.485785] [ 20.485841] The buggy address belongs to the physical page: [ 20.485887] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1056d5 [ 20.485968] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 20.486415] page_type: f5(slab) [ 20.486623] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 20.487232] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 20.487427] page dumped because: kasan: bad access detected [ 20.487708] [ 20.487835] Memory state around the buggy address: [ 20.488402] fff00000c56d4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.488491] fff00000c56d5000: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.488766] >fff00000c56d5080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.488899] ^ [ 20.489288] fff00000c56d5100: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 20.489374] fff00000c56d5180: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 20.489635] ==================================================================
[ 13.527058] ================================================================== [ 13.528179] BUG: KASAN: slab-use-after-free in strcmp+0xb0/0xc0 [ 13.528482] Read of size 1 at addr ffff8881027a7e10 by task kunit_try_catch/276 [ 13.528869] [ 13.528987] CPU: 1 UID: 0 PID: 276 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 13.529032] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.529045] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.529066] Call Trace: [ 13.529079] <TASK> [ 13.529131] dump_stack_lvl+0x73/0xb0 [ 13.529161] print_report+0xd1/0x650 [ 13.529185] ? __virt_addr_valid+0x1db/0x2d0 [ 13.529209] ? strcmp+0xb0/0xc0 [ 13.529230] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.529254] ? strcmp+0xb0/0xc0 [ 13.529275] kasan_report+0x141/0x180 [ 13.529297] ? strcmp+0xb0/0xc0 [ 13.529324] __asan_report_load1_noabort+0x18/0x20 [ 13.529348] strcmp+0xb0/0xc0 [ 13.529371] kasan_strings+0x431/0xe80 [ 13.529392] ? trace_hardirqs_on+0x37/0xe0 [ 13.529415] ? __pfx_kasan_strings+0x10/0x10 [ 13.529453] ? finish_task_switch.isra.0+0x153/0x700 [ 13.529521] ? __switch_to+0x47/0xf50 [ 13.529550] ? __schedule+0x10cc/0x2b60 [ 13.529572] ? __pfx_read_tsc+0x10/0x10 [ 13.529593] ? ktime_get_ts64+0x86/0x230 [ 13.529617] kunit_try_run_case+0x1a5/0x480 [ 13.529641] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.529663] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.529686] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.529710] ? __kthread_parkme+0x82/0x180 [ 13.529730] ? preempt_count_sub+0x50/0x80 [ 13.529753] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.529778] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.529801] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.529825] kthread+0x337/0x6f0 [ 13.529844] ? trace_preempt_on+0x20/0xc0 [ 13.529867] ? __pfx_kthread+0x10/0x10 [ 13.529888] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.529909] ? calculate_sigpending+0x7b/0xa0 [ 13.529945] ? __pfx_kthread+0x10/0x10 [ 13.529967] ret_from_fork+0x116/0x1d0 [ 13.529985] ? __pfx_kthread+0x10/0x10 [ 13.530006] ret_from_fork_asm+0x1a/0x30 [ 13.530037] </TASK> [ 13.530049] [ 13.539144] Allocated by task 276: [ 13.539559] kasan_save_stack+0x45/0x70 [ 13.539813] kasan_save_track+0x18/0x40 [ 13.540108] kasan_save_alloc_info+0x3b/0x50 [ 13.540336] __kasan_kmalloc+0xb7/0xc0 [ 13.540674] __kmalloc_cache_noprof+0x189/0x420 [ 13.541004] kasan_strings+0xc0/0xe80 [ 13.541303] kunit_try_run_case+0x1a5/0x480 [ 13.541692] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.541994] kthread+0x337/0x6f0 [ 13.542264] ret_from_fork+0x116/0x1d0 [ 13.542611] ret_from_fork_asm+0x1a/0x30 [ 13.542792] [ 13.542883] Freed by task 276: [ 13.543042] kasan_save_stack+0x45/0x70 [ 13.543522] kasan_save_track+0x18/0x40 [ 13.543736] kasan_save_free_info+0x3f/0x60 [ 13.543929] __kasan_slab_free+0x56/0x70 [ 13.544277] kfree+0x222/0x3f0 [ 13.544591] kasan_strings+0x2aa/0xe80 [ 13.544965] kunit_try_run_case+0x1a5/0x480 [ 13.545292] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.545694] kthread+0x337/0x6f0 [ 13.545847] ret_from_fork+0x116/0x1d0 [ 13.546041] ret_from_fork_asm+0x1a/0x30 [ 13.546536] [ 13.546764] The buggy address belongs to the object at ffff8881027a7e00 [ 13.546764] which belongs to the cache kmalloc-32 of size 32 [ 13.547532] The buggy address is located 16 bytes inside of [ 13.547532] freed 32-byte region [ffff8881027a7e00, ffff8881027a7e20) [ 13.548356] [ 13.548459] The buggy address belongs to the physical page: [ 13.548697] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1027a7 [ 13.549041] flags: 0x200000000000000(node=0|zone=2) [ 13.549813] page_type: f5(slab) [ 13.549995] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.550850] raw: 0000000000000000 0000000000400040 00000000f5000000 0000000000000000 [ 13.551361] page dumped because: kasan: bad access detected [ 13.551782] [ 13.552021] Memory state around the buggy address: [ 13.552382] ffff8881027a7d00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.552933] ffff8881027a7d80: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.553391] >ffff8881027a7e00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.553718] ^ [ 13.553897] ffff8881027a7e80: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.554802] ffff8881027a7f00: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.555233] ==================================================================