Date
July 2, 2025, 11:09 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 18.676856] ================================================================== [ 18.677071] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 18.677135] Read of size 8 at addr fff00000c706cac0 by task kunit_try_catch/200 [ 18.677443] [ 18.677925] CPU: 0 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT [ 18.678023] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.678252] Hardware name: linux,dummy-virt (DT) [ 18.678389] Call trace: [ 18.678487] show_stack+0x20/0x38 (C) [ 18.678616] dump_stack_lvl+0x8c/0xd0 [ 18.678739] print_report+0x118/0x608 [ 18.678810] kasan_report+0xdc/0x128 [ 18.678888] __asan_report_load8_noabort+0x20/0x30 [ 18.678943] workqueue_uaf+0x480/0x4a8 [ 18.678990] kunit_try_run_case+0x170/0x3f0 [ 18.679048] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.679109] kthread+0x328/0x630 [ 18.679168] ret_from_fork+0x10/0x20 [ 18.679226] [ 18.679245] Allocated by task 200: [ 18.679274] kasan_save_stack+0x3c/0x68 [ 18.679326] kasan_save_track+0x20/0x40 [ 18.679379] kasan_save_alloc_info+0x40/0x58 [ 18.679419] __kasan_kmalloc+0xd4/0xd8 [ 18.679465] __kmalloc_cache_noprof+0x16c/0x3c0 [ 18.679515] workqueue_uaf+0x13c/0x4a8 [ 18.679552] kunit_try_run_case+0x170/0x3f0 [ 18.679601] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.679654] kthread+0x328/0x630 [ 18.679687] ret_from_fork+0x10/0x20 [ 18.679738] [ 18.679764] Freed by task 11: [ 18.679800] kasan_save_stack+0x3c/0x68 [ 18.679837] kasan_save_track+0x20/0x40 [ 18.679885] kasan_save_free_info+0x4c/0x78 [ 18.679923] __kasan_slab_free+0x6c/0x98 [ 18.679960] kfree+0x214/0x3c8 [ 18.680002] workqueue_uaf_work+0x18/0x30 [ 18.680036] process_one_work+0x530/0xf98 [ 18.680073] worker_thread+0x618/0xf38 [ 18.680107] kthread+0x328/0x630 [ 18.680149] ret_from_fork+0x10/0x20 [ 18.680185] [ 18.680225] Last potentially related work creation: [ 18.680261] kasan_save_stack+0x3c/0x68 [ 18.680309] kasan_record_aux_stack+0xb4/0xc8 [ 18.680357] __queue_work+0x65c/0x1008 [ 18.680393] queue_work_on+0xbc/0xf8 [ 18.680437] workqueue_uaf+0x210/0x4a8 [ 18.680486] kunit_try_run_case+0x170/0x3f0 [ 18.680523] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 18.680566] kthread+0x328/0x630 [ 18.680745] ret_from_fork+0x10/0x20 [ 18.680799] [ 18.680946] The buggy address belongs to the object at fff00000c706cac0 [ 18.680946] which belongs to the cache kmalloc-32 of size 32 [ 18.681365] The buggy address is located 0 bytes inside of [ 18.681365] freed 32-byte region [fff00000c706cac0, fff00000c706cae0) [ 18.681662] [ 18.681691] The buggy address belongs to the physical page: [ 18.681723] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10706c [ 18.681779] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 18.681943] page_type: f5(slab) [ 18.682136] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 18.682297] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 18.682371] page dumped because: kasan: bad access detected [ 18.682519] [ 18.682584] Memory state around the buggy address: [ 18.682620] fff00000c706c980: 00 00 03 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 18.682893] fff00000c706ca00: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.682998] >fff00000c706ca80: 00 00 00 07 fc fc fc fc fa fb fb fb fc fc fc fc [ 18.683040] ^ [ 18.683077] fff00000c706cb00: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.683138] fff00000c706cb80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.683286] ==================================================================
[ 11.998869] ================================================================== [ 11.999312] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 11.999554] Read of size 8 at addr ffff88810312f180 by task kunit_try_catch/219 [ 12.000963] [ 12.001227] CPU: 1 UID: 0 PID: 219 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc4 #1 PREEMPT(voluntary) [ 12.001277] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.001289] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.001309] Call Trace: [ 12.001322] <TASK> [ 12.001340] dump_stack_lvl+0x73/0xb0 [ 12.001381] print_report+0xd1/0x650 [ 12.001405] ? __virt_addr_valid+0x1db/0x2d0 [ 12.001428] ? workqueue_uaf+0x4d6/0x560 [ 12.001448] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.001469] ? workqueue_uaf+0x4d6/0x560 [ 12.001489] kasan_report+0x141/0x180 [ 12.001510] ? workqueue_uaf+0x4d6/0x560 [ 12.001534] __asan_report_load8_noabort+0x18/0x20 [ 12.001557] workqueue_uaf+0x4d6/0x560 [ 12.001604] ? __pfx_workqueue_uaf+0x10/0x10 [ 12.001626] ? __schedule+0x10cc/0x2b60 [ 12.001647] ? __pfx_read_tsc+0x10/0x10 [ 12.001667] ? ktime_get_ts64+0x86/0x230 [ 12.001691] kunit_try_run_case+0x1a5/0x480 [ 12.001715] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.001735] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.001757] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.001778] ? __kthread_parkme+0x82/0x180 [ 12.001798] ? preempt_count_sub+0x50/0x80 [ 12.001821] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.001843] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.001864] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.001885] kthread+0x337/0x6f0 [ 12.001903] ? trace_preempt_on+0x20/0xc0 [ 12.001926] ? __pfx_kthread+0x10/0x10 [ 12.001945] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.001964] ? calculate_sigpending+0x7b/0xa0 [ 12.001987] ? __pfx_kthread+0x10/0x10 [ 12.002006] ret_from_fork+0x116/0x1d0 [ 12.002023] ? __pfx_kthread+0x10/0x10 [ 12.002042] ret_from_fork_asm+0x1a/0x30 [ 12.002072] </TASK> [ 12.002083] [ 12.013261] Allocated by task 219: [ 12.013465] kasan_save_stack+0x45/0x70 [ 12.013877] kasan_save_track+0x18/0x40 [ 12.014060] kasan_save_alloc_info+0x3b/0x50 [ 12.014253] __kasan_kmalloc+0xb7/0xc0 [ 12.014439] __kmalloc_cache_noprof+0x189/0x420 [ 12.014932] workqueue_uaf+0x152/0x560 [ 12.015161] kunit_try_run_case+0x1a5/0x480 [ 12.015516] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.015981] kthread+0x337/0x6f0 [ 12.016255] ret_from_fork+0x116/0x1d0 [ 12.016515] ret_from_fork_asm+0x1a/0x30 [ 12.017206] [ 12.017314] Freed by task 24: [ 12.017666] kasan_save_stack+0x45/0x70 [ 12.017855] kasan_save_track+0x18/0x40 [ 12.018240] kasan_save_free_info+0x3f/0x60 [ 12.018546] __kasan_slab_free+0x56/0x70 [ 12.018958] kfree+0x222/0x3f0 [ 12.019139] workqueue_uaf_work+0x12/0x20 [ 12.019589] process_one_work+0x5ee/0xf60 [ 12.019983] worker_thread+0x758/0x1220 [ 12.020286] kthread+0x337/0x6f0 [ 12.020881] ret_from_fork+0x116/0x1d0 [ 12.021068] ret_from_fork_asm+0x1a/0x30 [ 12.021211] [ 12.021310] Last potentially related work creation: [ 12.021556] kasan_save_stack+0x45/0x70 [ 12.022073] kasan_record_aux_stack+0xb2/0xc0 [ 12.022388] __queue_work+0x626/0xeb0 [ 12.022824] queue_work_on+0xb6/0xc0 [ 12.023010] workqueue_uaf+0x26d/0x560 [ 12.023308] kunit_try_run_case+0x1a5/0x480 [ 12.023565] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.024053] kthread+0x337/0x6f0 [ 12.024321] ret_from_fork+0x116/0x1d0 [ 12.024758] ret_from_fork_asm+0x1a/0x30 [ 12.025068] [ 12.025169] The buggy address belongs to the object at ffff88810312f180 [ 12.025169] which belongs to the cache kmalloc-32 of size 32 [ 12.026056] The buggy address is located 0 bytes inside of [ 12.026056] freed 32-byte region [ffff88810312f180, ffff88810312f1a0) [ 12.026755] [ 12.026847] The buggy address belongs to the physical page: [ 12.027082] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10312f [ 12.027456] flags: 0x200000000000000(node=0|zone=2) [ 12.027713] page_type: f5(slab) [ 12.028262] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 12.028830] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 12.029290] page dumped because: kasan: bad access detected [ 12.029701] [ 12.029853] Memory state around the buggy address: [ 12.030309] ffff88810312f080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 12.030859] ffff88810312f100: fa fb fb fb fc fc fc fc 00 00 00 07 fc fc fc fc [ 12.031272] >ffff88810312f180: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 12.031904] ^ [ 12.032053] ffff88810312f200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.032455] ffff88810312f280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.033018] ==================================================================