Date
May 23, 2025, 11:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 28.281011] ================================================================== [ 28.281417] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 28.281798] Read of size 8 at addr fff00000c7775200 by task kunit_try_catch/202 [ 28.282212] [ 28.282466] CPU: 0 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT [ 28.282874] Tainted: [B]=BAD_PAGE, [N]=TEST [ 28.282962] Hardware name: linux,dummy-virt (DT) [ 28.283060] Call trace: [ 28.283209] show_stack+0x20/0x38 (C) [ 28.283517] dump_stack_lvl+0x8c/0xd0 [ 28.283966] print_report+0x118/0x608 [ 28.284155] kasan_report+0xdc/0x128 [ 28.284301] __asan_report_load8_noabort+0x20/0x30 [ 28.284468] workqueue_uaf+0x480/0x4a8 [ 28.284613] kunit_try_run_case+0x170/0x3f0 [ 28.284882] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.285150] kthread+0x328/0x630 [ 28.285539] ret_from_fork+0x10/0x20 [ 28.286462] [ 28.286533] Allocated by task 202: [ 28.286638] kasan_save_stack+0x3c/0x68 [ 28.286769] kasan_save_track+0x20/0x40 [ 28.286869] kasan_save_alloc_info+0x40/0x58 [ 28.287074] __kasan_kmalloc+0xd4/0xd8 [ 28.287246] __kmalloc_cache_noprof+0x15c/0x3c0 [ 28.287462] workqueue_uaf+0x13c/0x4a8 [ 28.287637] kunit_try_run_case+0x170/0x3f0 [ 28.287778] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.287930] kthread+0x328/0x630 [ 28.288239] ret_from_fork+0x10/0x20 [ 28.288443] [ 28.288556] Freed by task 9: [ 28.288667] kasan_save_stack+0x3c/0x68 [ 28.288851] kasan_save_track+0x20/0x40 [ 28.289021] kasan_save_free_info+0x4c/0x78 [ 28.289143] __kasan_slab_free+0x6c/0x98 [ 28.289765] kfree+0x214/0x3c8 [ 28.289894] workqueue_uaf_work+0x18/0x30 [ 28.290080] process_one_work+0x530/0xf98 [ 28.290189] worker_thread+0x8ac/0xf28 [ 28.290490] kthread+0x328/0x630 [ 28.290607] ret_from_fork+0x10/0x20 [ 28.290716] [ 28.290771] Last potentially related work creation: [ 28.290852] kasan_save_stack+0x3c/0x68 [ 28.290997] kasan_record_aux_stack+0xb4/0xc8 [ 28.291155] __queue_work+0x65c/0x1010 [ 28.291300] queue_work_on+0xbc/0xf8 [ 28.291586] workqueue_uaf+0x210/0x4a8 [ 28.291833] kunit_try_run_case+0x170/0x3f0 [ 28.292046] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 28.292400] kthread+0x328/0x630 [ 28.292548] ret_from_fork+0x10/0x20 [ 28.293236] [ 28.293396] The buggy address belongs to the object at fff00000c7775200 [ 28.293396] which belongs to the cache kmalloc-32 of size 32 [ 28.294135] The buggy address is located 0 bytes inside of [ 28.294135] freed 32-byte region [fff00000c7775200, fff00000c7775220) [ 28.294574] [ 28.294683] The buggy address belongs to the physical page: [ 28.295242] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107775 [ 28.295658] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 28.296053] page_type: f5(slab) [ 28.296665] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 28.297097] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 28.297561] page dumped because: kasan: bad access detected [ 28.298114] [ 28.298460] Memory state around the buggy address: [ 28.298907] fff00000c7775100: 00 00 03 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 28.299104] fff00000c7775180: 00 00 00 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 28.300381] >fff00000c7775200: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 28.300893] ^ [ 28.300994] fff00000c7775280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.301547] fff00000c7775300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.301681] ==================================================================
[ 13.242931] ================================================================== [ 13.243925] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 13.244412] Read of size 8 at addr ffff888102705100 by task kunit_try_catch/219 [ 13.245144] [ 13.245464] CPU: 0 UID: 0 PID: 219 Comm: kunit_try_catch Tainted: G B N 6.15.0-rc7 #1 PREEMPT(voluntary) [ 13.245519] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.245532] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.245554] Call Trace: [ 13.245699] <TASK> [ 13.245722] dump_stack_lvl+0x73/0xb0 [ 13.245767] print_report+0xd1/0x650 [ 13.245789] ? __virt_addr_valid+0x1db/0x2d0 [ 13.245810] ? workqueue_uaf+0x4d6/0x560 [ 13.245831] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.245885] ? workqueue_uaf+0x4d6/0x560 [ 13.245906] kasan_report+0x141/0x180 [ 13.245928] ? workqueue_uaf+0x4d6/0x560 [ 13.245954] __asan_report_load8_noabort+0x18/0x20 [ 13.245974] workqueue_uaf+0x4d6/0x560 [ 13.245996] ? __pfx_workqueue_uaf+0x10/0x10 [ 13.246019] ? __schedule+0x10cc/0x2b30 [ 13.246040] ? __pfx_read_tsc+0x10/0x10 [ 13.246060] ? ktime_get_ts64+0x86/0x230 [ 13.246085] kunit_try_run_case+0x1a5/0x480 [ 13.246108] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.246129] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.246152] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.246174] ? __kthread_parkme+0x82/0x180 [ 13.246195] ? preempt_count_sub+0x50/0x80 [ 13.246220] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.246242] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.246264] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.246286] kthread+0x337/0x6f0 [ 13.246312] ? trace_preempt_on+0x20/0xc0 [ 13.246335] ? __pfx_kthread+0x10/0x10 [ 13.246352] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.246372] ? calculate_sigpending+0x7b/0xa0 [ 13.246393] ? __pfx_kthread+0x10/0x10 [ 13.246411] ret_from_fork+0x41/0x80 [ 13.246430] ? __pfx_kthread+0x10/0x10 [ 13.246448] ret_from_fork_asm+0x1a/0x30 [ 13.246479] </TASK> [ 13.246491] [ 13.255705] Allocated by task 219: [ 13.256129] kasan_save_stack+0x45/0x70 [ 13.256453] kasan_save_track+0x18/0x40 [ 13.256715] kasan_save_alloc_info+0x3b/0x50 [ 13.257029] __kasan_kmalloc+0xb7/0xc0 [ 13.257171] __kmalloc_cache_noprof+0x189/0x420 [ 13.257463] workqueue_uaf+0x152/0x560 [ 13.257670] kunit_try_run_case+0x1a5/0x480 [ 13.258570] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.258839] kthread+0x337/0x6f0 [ 13.259185] ret_from_fork+0x41/0x80 [ 13.259423] ret_from_fork_asm+0x1a/0x30 [ 13.259623] [ 13.259720] Freed by task 9: [ 13.260083] kasan_save_stack+0x45/0x70 [ 13.260276] kasan_save_track+0x18/0x40 [ 13.260450] kasan_save_free_info+0x3f/0x60 [ 13.260916] __kasan_slab_free+0x56/0x70 [ 13.261244] kfree+0x222/0x3f0 [ 13.261446] workqueue_uaf_work+0x12/0x20 [ 13.261984] process_one_work+0x5ee/0xf60 [ 13.262306] worker_thread+0x758/0x1220 [ 13.262712] kthread+0x337/0x6f0 [ 13.262930] ret_from_fork+0x41/0x80 [ 13.263117] ret_from_fork_asm+0x1a/0x30 [ 13.263320] [ 13.263403] Last potentially related work creation: [ 13.263867] kasan_save_stack+0x45/0x70 [ 13.264030] kasan_record_aux_stack+0xb2/0xc0 [ 13.264389] __queue_work+0x626/0xeb0 [ 13.264884] queue_work_on+0xb6/0xc0 [ 13.265080] workqueue_uaf+0x26d/0x560 [ 13.265378] kunit_try_run_case+0x1a5/0x480 [ 13.265668] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.266193] kthread+0x337/0x6f0 [ 13.266391] ret_from_fork+0x41/0x80 [ 13.266703] ret_from_fork_asm+0x1a/0x30 [ 13.266873] [ 13.267121] The buggy address belongs to the object at ffff888102705100 [ 13.267121] which belongs to the cache kmalloc-32 of size 32 [ 13.267673] The buggy address is located 0 bytes inside of [ 13.267673] freed 32-byte region [ffff888102705100, ffff888102705120) [ 13.268206] [ 13.268323] The buggy address belongs to the physical page: [ 13.268656] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102705 [ 13.269476] flags: 0x200000000000000(node=0|zone=2) [ 13.269875] page_type: f5(slab) [ 13.270276] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.270782] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.271272] page dumped because: kasan: bad access detected [ 13.271575] [ 13.271717] Memory state around the buggy address: [ 13.271970] ffff888102705000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 13.272497] ffff888102705080: 00 00 00 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 13.273165] >ffff888102705100: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 13.273533] ^ [ 13.273725] ffff888102705180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.274039] ffff888102705200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.274693] ==================================================================