Date
July 18, 2025, 11:11 p.m.
Environment | |
---|---|
qemu-arm64 | |
qemu-x86_64 |
[ 15.771587] ================================================================== [ 15.771666] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 15.771812] Read of size 8 at addr fff00000c7713f80 by task kunit_try_catch/200 [ 15.771867] [ 15.772005] CPU: 1 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT [ 15.772095] Tainted: [B]=BAD_PAGE, [N]=TEST [ 15.772159] Hardware name: linux,dummy-virt (DT) [ 15.772325] Call trace: [ 15.772372] show_stack+0x20/0x38 (C) [ 15.772564] dump_stack_lvl+0x8c/0xd0 [ 15.772762] print_report+0x118/0x5d0 [ 15.772835] kasan_report+0xdc/0x128 [ 15.772938] __asan_report_load8_noabort+0x20/0x30 [ 15.773038] workqueue_uaf+0x480/0x4a8 [ 15.773125] kunit_try_run_case+0x170/0x3f0 [ 15.773177] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.773230] kthread+0x328/0x630 [ 15.773321] ret_from_fork+0x10/0x20 [ 15.773425] [ 15.773453] Allocated by task 200: [ 15.773482] kasan_save_stack+0x3c/0x68 [ 15.773528] kasan_save_track+0x20/0x40 [ 15.773865] kasan_save_alloc_info+0x40/0x58 [ 15.774012] __kasan_kmalloc+0xd4/0xd8 [ 15.774088] __kmalloc_cache_noprof+0x16c/0x3c0 [ 15.774153] workqueue_uaf+0x13c/0x4a8 [ 15.774252] kunit_try_run_case+0x170/0x3f0 [ 15.774300] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.774354] kthread+0x328/0x630 [ 15.774387] ret_from_fork+0x10/0x20 [ 15.774423] [ 15.774443] Freed by task 56: [ 15.774470] kasan_save_stack+0x3c/0x68 [ 15.774508] kasan_save_track+0x20/0x40 [ 15.774545] kasan_save_free_info+0x4c/0x78 [ 15.774586] __kasan_slab_free+0x6c/0x98 [ 15.774622] kfree+0x214/0x3c8 [ 15.774656] workqueue_uaf_work+0x18/0x30 [ 15.774690] process_one_work+0x530/0xf98 [ 15.774728] worker_thread+0x618/0xf38 [ 15.774772] kthread+0x328/0x630 [ 15.774806] ret_from_fork+0x10/0x20 [ 15.774840] [ 15.774860] Last potentially related work creation: [ 15.774908] kasan_save_stack+0x3c/0x68 [ 15.774953] kasan_record_aux_stack+0xb4/0xc8 [ 15.774992] __queue_work+0x65c/0x1008 [ 15.775030] queue_work_on+0xbc/0xf8 [ 15.775068] workqueue_uaf+0x210/0x4a8 [ 15.775112] kunit_try_run_case+0x170/0x3f0 [ 15.775151] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 15.775196] kthread+0x328/0x630 [ 15.775229] ret_from_fork+0x10/0x20 [ 15.775265] [ 15.775304] The buggy address belongs to the object at fff00000c7713f80 [ 15.775304] which belongs to the cache kmalloc-32 of size 32 [ 15.775873] The buggy address is located 0 bytes inside of [ 15.775873] freed 32-byte region [fff00000c7713f80, fff00000c7713fa0) [ 15.775961] [ 15.776017] The buggy address belongs to the physical page: [ 15.776069] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x107713 [ 15.776165] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 15.776663] page_type: f5(slab) [ 15.776787] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 15.776934] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 15.777060] page dumped because: kasan: bad access detected [ 15.777094] [ 15.777113] Memory state around the buggy address: [ 15.777322] fff00000c7713e80: 00 00 00 fc fc fc fc fc 00 00 03 fc fc fc fc fc [ 15.777432] fff00000c7713f00: 00 00 07 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 15.777505] >fff00000c7713f80: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 15.777670] ^ [ 15.777750] fff00000c7714000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 15.777872] fff00000c7714080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 15.777968] ==================================================================
[ 12.789220] ================================================================== [ 12.789914] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 12.790411] Read of size 8 at addr ffff8881030e7800 by task kunit_try_catch/219 [ 12.790743] [ 12.791012] CPU: 1 UID: 0 PID: 219 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc6 #1 PREEMPT(voluntary) [ 12.791058] Tainted: [B]=BAD_PAGE, [N]=TEST [ 12.791069] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 12.791090] Call Trace: [ 12.791102] <TASK> [ 12.791117] dump_stack_lvl+0x73/0xb0 [ 12.791148] print_report+0xd1/0x610 [ 12.791170] ? __virt_addr_valid+0x1db/0x2d0 [ 12.791193] ? workqueue_uaf+0x4d6/0x560 [ 12.791214] ? kasan_complete_mode_report_info+0x64/0x200 [ 12.791236] ? workqueue_uaf+0x4d6/0x560 [ 12.791257] kasan_report+0x141/0x180 [ 12.791367] ? workqueue_uaf+0x4d6/0x560 [ 12.791393] __asan_report_load8_noabort+0x18/0x20 [ 12.791417] workqueue_uaf+0x4d6/0x560 [ 12.791438] ? __pfx_workqueue_uaf+0x10/0x10 [ 12.791460] ? __schedule+0x10cc/0x2b60 [ 12.791482] ? __pfx_read_tsc+0x10/0x10 [ 12.791503] ? ktime_get_ts64+0x86/0x230 [ 12.791527] kunit_try_run_case+0x1a5/0x480 [ 12.791551] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.791573] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 12.791597] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 12.791620] ? __kthread_parkme+0x82/0x180 [ 12.791640] ? preempt_count_sub+0x50/0x80 [ 12.791664] ? __pfx_kunit_try_run_case+0x10/0x10 [ 12.791687] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.791709] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 12.791733] kthread+0x337/0x6f0 [ 12.791751] ? trace_preempt_on+0x20/0xc0 [ 12.791773] ? __pfx_kthread+0x10/0x10 [ 12.791793] ? _raw_spin_unlock_irq+0x47/0x80 [ 12.791813] ? calculate_sigpending+0x7b/0xa0 [ 12.791837] ? __pfx_kthread+0x10/0x10 [ 12.791857] ret_from_fork+0x116/0x1d0 [ 12.791875] ? __pfx_kthread+0x10/0x10 [ 12.791895] ret_from_fork_asm+0x1a/0x30 [ 12.791925] </TASK> [ 12.791934] [ 12.799402] Allocated by task 219: [ 12.799571] kasan_save_stack+0x45/0x70 [ 12.799713] kasan_save_track+0x18/0x40 [ 12.799848] kasan_save_alloc_info+0x3b/0x50 [ 12.800241] __kasan_kmalloc+0xb7/0xc0 [ 12.800454] __kmalloc_cache_noprof+0x189/0x420 [ 12.800819] workqueue_uaf+0x152/0x560 [ 12.801070] kunit_try_run_case+0x1a5/0x480 [ 12.801272] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.801462] kthread+0x337/0x6f0 [ 12.801632] ret_from_fork+0x116/0x1d0 [ 12.801816] ret_from_fork_asm+0x1a/0x30 [ 12.802010] [ 12.802159] Freed by task 41: [ 12.802321] kasan_save_stack+0x45/0x70 [ 12.802495] kasan_save_track+0x18/0x40 [ 12.802677] kasan_save_free_info+0x3f/0x60 [ 12.802874] __kasan_slab_free+0x56/0x70 [ 12.803121] kfree+0x222/0x3f0 [ 12.803311] workqueue_uaf_work+0x12/0x20 [ 12.803461] process_one_work+0x5ee/0xf60 [ 12.803659] worker_thread+0x758/0x1220 [ 12.803833] kthread+0x337/0x6f0 [ 12.803984] ret_from_fork+0x116/0x1d0 [ 12.804266] ret_from_fork_asm+0x1a/0x30 [ 12.804495] [ 12.804568] Last potentially related work creation: [ 12.804776] kasan_save_stack+0x45/0x70 [ 12.804974] kasan_record_aux_stack+0xb2/0xc0 [ 12.805126] __queue_work+0x626/0xeb0 [ 12.805259] queue_work_on+0xb6/0xc0 [ 12.805582] workqueue_uaf+0x26d/0x560 [ 12.805771] kunit_try_run_case+0x1a5/0x480 [ 12.805923] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 12.806101] kthread+0x337/0x6f0 [ 12.806262] ret_from_fork+0x116/0x1d0 [ 12.806457] ret_from_fork_asm+0x1a/0x30 [ 12.806725] [ 12.806819] The buggy address belongs to the object at ffff8881030e7800 [ 12.806819] which belongs to the cache kmalloc-32 of size 32 [ 12.807352] The buggy address is located 0 bytes inside of [ 12.807352] freed 32-byte region [ffff8881030e7800, ffff8881030e7820) [ 12.807966] [ 12.808064] The buggy address belongs to the physical page: [ 12.808469] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1030e7 [ 12.808785] flags: 0x200000000000000(node=0|zone=2) [ 12.809023] page_type: f5(slab) [ 12.809235] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 12.809596] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 12.809893] page dumped because: kasan: bad access detected [ 12.810148] [ 12.810220] Memory state around the buggy address: [ 12.810386] ffff8881030e7700: 00 00 00 fc fc fc fc fc 00 00 03 fc fc fc fc fc [ 12.810678] ffff8881030e7780: 00 00 07 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 12.811009] >ffff8881030e7800: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 12.811443] ^ [ 12.811595] ffff8881030e7880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.811857] ffff8881030e7900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.812275] ==================================================================