Date
July 9, 2025, 1:08 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 29.711353] ================================================================== [ 29.711419] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 29.711710] Read of size 8 at addr fff00000c5999f00 by task kunit_try_catch/232 [ 29.712314] [ 29.712461] CPU: 0 UID: 0 PID: 232 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5-next-20250709 #1 PREEMPT [ 29.712648] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.712698] Hardware name: linux,dummy-virt (DT) [ 29.712775] Call trace: [ 29.712800] show_stack+0x20/0x38 (C) [ 29.712875] dump_stack_lvl+0x8c/0xd0 [ 29.712925] print_report+0x118/0x5d0 [ 29.713286] kasan_report+0xdc/0x128 [ 29.713350] __asan_report_load8_noabort+0x20/0x30 [ 29.713618] workqueue_uaf+0x480/0x4a8 [ 29.713783] kunit_try_run_case+0x170/0x3f0 [ 29.713843] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.713899] kthread+0x328/0x630 [ 29.713941] ret_from_fork+0x10/0x20 [ 29.713987] [ 29.714007] Allocated by task 232: [ 29.714036] kasan_save_stack+0x3c/0x68 [ 29.714093] kasan_save_track+0x20/0x40 [ 29.714138] kasan_save_alloc_info+0x40/0x58 [ 29.714183] __kasan_kmalloc+0xd4/0xd8 [ 29.714225] __kmalloc_cache_noprof+0x16c/0x3c0 [ 29.714270] workqueue_uaf+0x13c/0x4a8 [ 29.714308] kunit_try_run_case+0x170/0x3f0 [ 29.714347] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.714391] kthread+0x328/0x630 [ 29.714428] ret_from_fork+0x10/0x20 [ 29.714465] [ 29.714484] Freed by task 9: [ 29.714510] kasan_save_stack+0x3c/0x68 [ 29.714554] kasan_save_track+0x20/0x40 [ 29.714593] kasan_save_free_info+0x4c/0x78 [ 29.714630] __kasan_slab_free+0x6c/0x98 [ 29.714669] kfree+0x214/0x3c8 [ 29.714705] workqueue_uaf_work+0x18/0x30 [ 29.714742] process_one_work+0x530/0xf98 [ 29.714780] worker_thread+0x618/0xf38 [ 29.714821] kthread+0x328/0x630 [ 29.714871] ret_from_fork+0x10/0x20 [ 29.714910] [ 29.714944] Last potentially related work creation: [ 29.714982] kasan_save_stack+0x3c/0x68 [ 29.715030] kasan_record_aux_stack+0xb4/0xc8 [ 29.715410] __queue_work+0x65c/0xfe0 [ 29.715457] queue_work_on+0xbc/0xf8 [ 29.715836] workqueue_uaf+0x210/0x4a8 [ 29.715963] kunit_try_run_case+0x170/0x3f0 [ 29.716031] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 29.716088] kthread+0x328/0x630 [ 29.716144] ret_from_fork+0x10/0x20 [ 29.716179] [ 29.716201] The buggy address belongs to the object at fff00000c5999f00 [ 29.716201] which belongs to the cache kmalloc-32 of size 32 [ 29.716293] The buggy address is located 0 bytes inside of [ 29.716293] freed 32-byte region [fff00000c5999f00, fff00000c5999f20) [ 29.716355] [ 29.716533] The buggy address belongs to the physical page: [ 29.716618] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105999 [ 29.716709] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 29.716823] page_type: f5(slab) [ 29.716889] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 29.716959] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 29.716999] page dumped because: kasan: bad access detected [ 29.717233] [ 29.717387] Memory state around the buggy address: [ 29.717533] fff00000c5999e00: 00 00 03 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 29.717599] fff00000c5999e80: 00 00 00 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 29.717662] >fff00000c5999f00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 29.718176] ^ [ 29.718290] fff00000c5999f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.718335] fff00000c599a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.718517] ==================================================================
[ 24.674278] ================================================================== [ 24.674741] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 24.675018] Read of size 8 at addr ffff8881058cf5c0 by task kunit_try_catch/250 [ 24.675550] [ 24.675648] CPU: 0 UID: 0 PID: 250 Comm: kunit_try_catch Tainted: G B W N 6.16.0-rc5-next-20250709 #1 PREEMPT(voluntary) [ 24.675713] Tainted: [B]=BAD_PAGE, [W]=WARN, [N]=TEST [ 24.675727] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 24.675747] Call Trace: [ 24.675759] <TASK> [ 24.675777] dump_stack_lvl+0x73/0xb0 [ 24.675828] print_report+0xd1/0x610 [ 24.675849] ? __virt_addr_valid+0x1db/0x2d0 [ 24.675872] ? workqueue_uaf+0x4d6/0x560 [ 24.675943] ? kasan_complete_mode_report_info+0x64/0x200 [ 24.675971] ? workqueue_uaf+0x4d6/0x560 [ 24.675993] kasan_report+0x141/0x180 [ 24.676015] ? workqueue_uaf+0x4d6/0x560 [ 24.676040] __asan_report_load8_noabort+0x18/0x20 [ 24.676063] workqueue_uaf+0x4d6/0x560 [ 24.676086] ? __pfx_workqueue_uaf+0x10/0x10 [ 24.676109] ? __pfx_workqueue_uaf+0x10/0x10 [ 24.676133] kunit_try_run_case+0x1a5/0x480 [ 24.676155] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.676175] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 24.676198] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 24.676222] ? __kthread_parkme+0x82/0x180 [ 24.676242] ? preempt_count_sub+0x50/0x80 [ 24.676266] ? __pfx_kunit_try_run_case+0x10/0x10 [ 24.676287] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.676311] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 24.676335] kthread+0x337/0x6f0 [ 24.676354] ? trace_preempt_on+0x20/0xc0 [ 24.676378] ? __pfx_kthread+0x10/0x10 [ 24.676398] ? _raw_spin_unlock_irq+0x47/0x80 [ 24.676419] ? calculate_sigpending+0x7b/0xa0 [ 24.676443] ? __pfx_kthread+0x10/0x10 [ 24.676464] ret_from_fork+0x116/0x1d0 [ 24.676483] ? __pfx_kthread+0x10/0x10 [ 24.676502] ret_from_fork_asm+0x1a/0x30 [ 24.676533] </TASK> [ 24.676544] [ 24.683161] Allocated by task 250: [ 24.683284] kasan_save_stack+0x45/0x70 [ 24.683459] kasan_save_track+0x18/0x40 [ 24.683647] kasan_save_alloc_info+0x3b/0x50 [ 24.684580] __kasan_kmalloc+0xb7/0xc0 [ 24.685196] __kmalloc_cache_noprof+0x189/0x420 [ 24.685771] workqueue_uaf+0x152/0x560 [ 24.686187] kunit_try_run_case+0x1a5/0x480 [ 24.686341] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.686514] kthread+0x337/0x6f0 [ 24.686629] ret_from_fork+0x116/0x1d0 [ 24.686771] ret_from_fork_asm+0x1a/0x30 [ 24.686905] [ 24.686970] Freed by task 9: [ 24.687072] kasan_save_stack+0x45/0x70 [ 24.687203] kasan_save_track+0x18/0x40 [ 24.687332] kasan_save_free_info+0x3f/0x60 [ 24.687470] __kasan_slab_free+0x56/0x70 [ 24.687599] kfree+0x222/0x3f0 [ 24.687755] workqueue_uaf_work+0x12/0x20 [ 24.688097] process_one_work+0x5ee/0xf60 [ 24.688462] worker_thread+0x758/0x1220 [ 24.688817] kthread+0x337/0x6f0 [ 24.689102] ret_from_fork+0x116/0x1d0 [ 24.689424] ret_from_fork_asm+0x1a/0x30 [ 24.689940] [ 24.690117] Last potentially related work creation: [ 24.690622] kasan_save_stack+0x45/0x70 [ 24.691065] kasan_record_aux_stack+0xb2/0xc0 [ 24.691446] __queue_work+0x61a/0xe70 [ 24.691792] queue_work_on+0xb6/0xc0 [ 24.692188] workqueue_uaf+0x26d/0x560 [ 24.692528] kunit_try_run_case+0x1a5/0x480 [ 24.693019] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 24.693490] kthread+0x337/0x6f0 [ 24.693801] ret_from_fork+0x116/0x1d0 [ 24.694193] ret_from_fork_asm+0x1a/0x30 [ 24.694540] [ 24.694689] The buggy address belongs to the object at ffff8881058cf5c0 [ 24.694689] which belongs to the cache kmalloc-32 of size 32 [ 24.696110] The buggy address is located 0 bytes inside of [ 24.696110] freed 32-byte region [ffff8881058cf5c0, ffff8881058cf5e0) [ 24.697633] [ 24.697911] The buggy address belongs to the physical page: [ 24.698953] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1058cf [ 24.699269] flags: 0x200000000000000(node=0|zone=2) [ 24.699433] page_type: f5(slab) [ 24.699553] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 24.699840] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 24.700159] page dumped because: kasan: bad access detected [ 24.700360] [ 24.700425] Memory state around the buggy address: [ 24.700574] ffff8881058cf480: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 24.702147] ffff8881058cf500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 24.703342] >ffff8881058cf580: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 24.704033] ^ [ 24.704685] ffff8881058cf600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.705400] ffff8881058cf680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.706088] ==================================================================