Date
July 10, 2025, 11:10 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 16.327388] ================================================================== [ 16.327461] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 16.327877] Read of size 8 at addr fff00000c6437840 by task kunit_try_catch/200 [ 16.327954] [ 16.328003] CPU: 1 UID: 0 PID: 200 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT [ 16.328155] Tainted: [B]=BAD_PAGE, [N]=TEST [ 16.328182] Hardware name: linux,dummy-virt (DT) [ 16.328253] Call trace: [ 16.328279] show_stack+0x20/0x38 (C) [ 16.328337] dump_stack_lvl+0x8c/0xd0 [ 16.328389] print_report+0x118/0x608 [ 16.328444] kasan_report+0xdc/0x128 [ 16.328499] __asan_report_load8_noabort+0x20/0x30 [ 16.328552] workqueue_uaf+0x480/0x4a8 [ 16.328597] kunit_try_run_case+0x170/0x3f0 [ 16.328648] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.328702] kthread+0x328/0x630 [ 16.328746] ret_from_fork+0x10/0x20 [ 16.328795] [ 16.328814] Allocated by task 200: [ 16.328843] kasan_save_stack+0x3c/0x68 [ 16.328889] kasan_save_track+0x20/0x40 [ 16.328928] kasan_save_alloc_info+0x40/0x58 [ 16.329140] __kasan_kmalloc+0xd4/0xd8 [ 16.329208] __kmalloc_cache_noprof+0x16c/0x3c0 [ 16.329251] workqueue_uaf+0x13c/0x4a8 [ 16.329297] kunit_try_run_case+0x170/0x3f0 [ 16.329363] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.329408] kthread+0x328/0x630 [ 16.329457] ret_from_fork+0x10/0x20 [ 16.329503] [ 16.329529] Freed by task 47: [ 16.329566] kasan_save_stack+0x3c/0x68 [ 16.329622] kasan_save_track+0x20/0x40 [ 16.329668] kasan_save_free_info+0x4c/0x78 [ 16.329725] __kasan_slab_free+0x6c/0x98 [ 16.329871] kfree+0x214/0x3c8 [ 16.329928] workqueue_uaf_work+0x18/0x30 [ 16.329966] process_one_work+0x530/0xf98 [ 16.330003] worker_thread+0x618/0xf38 [ 16.330061] kthread+0x328/0x630 [ 16.330104] ret_from_fork+0x10/0x20 [ 16.330141] [ 16.330159] Last potentially related work creation: [ 16.330186] kasan_save_stack+0x3c/0x68 [ 16.330225] kasan_record_aux_stack+0xb4/0xc8 [ 16.330267] __queue_work+0x65c/0x1008 [ 16.330303] queue_work_on+0xbc/0xf8 [ 16.330339] workqueue_uaf+0x210/0x4a8 [ 16.330374] kunit_try_run_case+0x170/0x3f0 [ 16.330413] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 16.330455] kthread+0x328/0x630 [ 16.330488] ret_from_fork+0x10/0x20 [ 16.330668] [ 16.330720] The buggy address belongs to the object at fff00000c6437840 [ 16.330720] which belongs to the cache kmalloc-32 of size 32 [ 16.330813] The buggy address is located 0 bytes inside of [ 16.330813] freed 32-byte region [fff00000c6437840, fff00000c6437860) [ 16.330913] [ 16.330992] The buggy address belongs to the physical page: [ 16.331032] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106437 [ 16.331106] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 16.331159] page_type: f5(slab) [ 16.331199] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 16.331249] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 16.331290] page dumped because: kasan: bad access detected [ 16.331322] [ 16.331340] Memory state around the buggy address: [ 16.331371] fff00000c6437700: 00 00 00 fc fc fc fc fc 00 00 03 fc fc fc fc fc [ 16.331414] fff00000c6437780: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 16.331458] >fff00000c6437800: 00 00 00 07 fc fc fc fc fa fb fb fb fc fc fc fc [ 16.331496] ^ [ 16.331541] fff00000c6437880: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.331598] fff00000c6437900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 16.331637] ==================================================================
[ 13.318502] ================================================================== [ 13.319113] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 13.319352] Read of size 8 at addr ffff888102d710c0 by task kunit_try_catch/217 [ 13.319675] [ 13.319833] CPU: 1 UID: 0 PID: 217 Comm: kunit_try_catch Tainted: G B N 6.16.0-rc5 #1 PREEMPT(voluntary) [ 13.319878] Tainted: [B]=BAD_PAGE, [N]=TEST [ 13.319889] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 13.319909] Call Trace: [ 13.319922] <TASK> [ 13.319939] dump_stack_lvl+0x73/0xb0 [ 13.319970] print_report+0xd1/0x650 [ 13.320017] ? __virt_addr_valid+0x1db/0x2d0 [ 13.320041] ? workqueue_uaf+0x4d6/0x560 [ 13.320061] ? kasan_complete_mode_report_info+0x64/0x200 [ 13.320084] ? workqueue_uaf+0x4d6/0x560 [ 13.320105] kasan_report+0x141/0x180 [ 13.320126] ? workqueue_uaf+0x4d6/0x560 [ 13.320151] __asan_report_load8_noabort+0x18/0x20 [ 13.320201] workqueue_uaf+0x4d6/0x560 [ 13.320224] ? __pfx_workqueue_uaf+0x10/0x10 [ 13.320246] ? __schedule+0x10cc/0x2b60 [ 13.320269] ? __pfx_read_tsc+0x10/0x10 [ 13.320291] ? ktime_get_ts64+0x86/0x230 [ 13.320315] kunit_try_run_case+0x1a5/0x480 [ 13.320340] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.320383] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 13.320407] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 13.320431] ? __kthread_parkme+0x82/0x180 [ 13.320513] ? preempt_count_sub+0x50/0x80 [ 13.320538] ? __pfx_kunit_try_run_case+0x10/0x10 [ 13.320562] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.320586] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 13.320611] kthread+0x337/0x6f0 [ 13.320629] ? trace_preempt_on+0x20/0xc0 [ 13.320653] ? __pfx_kthread+0x10/0x10 [ 13.320673] ? _raw_spin_unlock_irq+0x47/0x80 [ 13.320695] ? calculate_sigpending+0x7b/0xa0 [ 13.320718] ? __pfx_kthread+0x10/0x10 [ 13.320739] ret_from_fork+0x116/0x1d0 [ 13.320757] ? __pfx_kthread+0x10/0x10 [ 13.320777] ret_from_fork_asm+0x1a/0x30 [ 13.320807] </TASK> [ 13.320817] [ 13.332997] Allocated by task 217: [ 13.333327] kasan_save_stack+0x45/0x70 [ 13.333866] kasan_save_track+0x18/0x40 [ 13.334230] kasan_save_alloc_info+0x3b/0x50 [ 13.334717] __kasan_kmalloc+0xb7/0xc0 [ 13.335184] __kmalloc_cache_noprof+0x189/0x420 [ 13.335788] workqueue_uaf+0x152/0x560 [ 13.336150] kunit_try_run_case+0x1a5/0x480 [ 13.336449] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.336994] kthread+0x337/0x6f0 [ 13.337121] ret_from_fork+0x116/0x1d0 [ 13.337253] ret_from_fork_asm+0x1a/0x30 [ 13.337457] [ 13.337675] Freed by task 44: [ 13.337960] kasan_save_stack+0x45/0x70 [ 13.338334] kasan_save_track+0x18/0x40 [ 13.338790] kasan_save_free_info+0x3f/0x60 [ 13.339184] __kasan_slab_free+0x56/0x70 [ 13.339677] kfree+0x222/0x3f0 [ 13.339982] workqueue_uaf_work+0x12/0x20 [ 13.340233] process_one_work+0x5ee/0xf60 [ 13.340474] worker_thread+0x758/0x1220 [ 13.340856] kthread+0x337/0x6f0 [ 13.341163] ret_from_fork+0x116/0x1d0 [ 13.341560] ret_from_fork_asm+0x1a/0x30 [ 13.341835] [ 13.341909] Last potentially related work creation: [ 13.342063] kasan_save_stack+0x45/0x70 [ 13.342200] kasan_record_aux_stack+0xb2/0xc0 [ 13.342419] __queue_work+0x626/0xeb0 [ 13.342842] queue_work_on+0xb6/0xc0 [ 13.343257] workqueue_uaf+0x26d/0x560 [ 13.343711] kunit_try_run_case+0x1a5/0x480 [ 13.344243] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 13.344890] kthread+0x337/0x6f0 [ 13.345212] ret_from_fork+0x116/0x1d0 [ 13.345598] ret_from_fork_asm+0x1a/0x30 [ 13.346102] [ 13.346263] The buggy address belongs to the object at ffff888102d710c0 [ 13.346263] which belongs to the cache kmalloc-32 of size 32 [ 13.346757] The buggy address is located 0 bytes inside of [ 13.346757] freed 32-byte region [ffff888102d710c0, ffff888102d710e0) [ 13.347094] [ 13.347165] The buggy address belongs to the physical page: [ 13.347331] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102d71 [ 13.347580] flags: 0x200000000000000(node=0|zone=2) [ 13.347917] page_type: f5(slab) [ 13.348040] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 13.348269] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 13.348562] page dumped because: kasan: bad access detected [ 13.348840] [ 13.348937] Memory state around the buggy address: [ 13.349172] ffff888102d70f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.349513] ffff888102d71000: 00 00 03 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 13.349803] >ffff888102d71080: 00 00 00 07 fc fc fc fc fa fb fb fb fc fc fc fc [ 13.350114] ^ [ 13.350376] ffff888102d71100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.350736] ffff888102d71180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.351045] ==================================================================