Date
June 7, 2025, 10:40 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 22.148462] ================================================================== [ 22.149366] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x498/0x4c0 [ 22.150185] Read of size 8 at addr fff00000c4227340 by task kunit_try_catch/188 [ 22.150990] [ 22.151334] CPU: 1 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.12.33-rc1 #1 [ 22.151563] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.151641] Hardware name: linux,dummy-virt (DT) [ 22.151730] Call trace: [ 22.151797] dump_backtrace+0x9c/0x128 [ 22.151914] show_stack+0x20/0x38 [ 22.152080] dump_stack_lvl+0x8c/0xd0 [ 22.152208] print_report+0x118/0x5f0 [ 22.152320] kasan_report+0xdc/0x128 [ 22.152427] __asan_report_load8_noabort+0x20/0x30 [ 22.152548] workqueue_uaf+0x498/0x4c0 [ 22.152660] kunit_try_run_case+0x170/0x3f0 [ 22.152805] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.152873] kthread+0x24c/0x2d0 [ 22.152918] ret_from_fork+0x10/0x20 [ 22.152996] [ 22.160873] Allocated by task 188: [ 22.161479] kasan_save_stack+0x3c/0x68 [ 22.162157] kasan_save_track+0x20/0x40 [ 22.163816] kasan_save_alloc_info+0x40/0x58 [ 22.164432] __kasan_kmalloc+0xd4/0xd8 [ 22.164918] __kmalloc_cache_noprof+0x154/0x320 [ 22.165540] workqueue_uaf+0x140/0x4c0 [ 22.166032] kunit_try_run_case+0x170/0x3f0 [ 22.166583] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.167220] kthread+0x24c/0x2d0 [ 22.168101] ret_from_fork+0x10/0x20 [ 22.168515] [ 22.168855] Freed by task 32: [ 22.169288] kasan_save_stack+0x3c/0x68 [ 22.169757] kasan_save_track+0x20/0x40 [ 22.170472] kasan_save_free_info+0x4c/0x78 [ 22.171036] __kasan_slab_free+0x6c/0x98 [ 22.171949] kfree+0x110/0x3b8 [ 22.172422] workqueue_uaf_work+0x18/0x30 [ 22.172936] process_one_work+0x530/0xfa8 [ 22.173450] worker_thread+0x610/0xf18 [ 22.173988] kthread+0x24c/0x2d0 [ 22.174466] ret_from_fork+0x10/0x20 [ 22.174996] [ 22.175313] Last potentially related work creation: [ 22.176714] kasan_save_stack+0x3c/0x68 [ 22.177239] __kasan_record_aux_stack+0xbc/0xe8 [ 22.177813] kasan_record_aux_stack_noalloc+0x14/0x20 [ 22.178522] __queue_work+0x654/0xfd8 [ 22.178871] queue_work_on+0xbc/0xf8 [ 22.179848] workqueue_uaf+0x218/0x4c0 [ 22.180335] kunit_try_run_case+0x170/0x3f0 [ 22.180899] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 22.181539] kthread+0x24c/0x2d0 [ 22.181995] ret_from_fork+0x10/0x20 [ 22.182461] [ 22.182778] The buggy address belongs to the object at fff00000c4227340 [ 22.182778] which belongs to the cache kmalloc-32 of size 32 [ 22.185536] The buggy address is located 0 bytes inside of [ 22.185536] freed 32-byte region [fff00000c4227340, fff00000c4227360) [ 22.186670] [ 22.187069] The buggy address belongs to the physical page: [ 22.187866] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104227 [ 22.189162] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 22.189483] page_type: f5(slab) [ 22.189684] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 22.190110] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 22.190859] page dumped because: kasan: bad access detected [ 22.191538] [ 22.191805] Memory state around the buggy address: [ 22.192839] fff00000c4227200: 00 00 05 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 22.193620] fff00000c4227280: fa fb fb fb fc fc fc fc 00 00 07 fc fc fc fc fc [ 22.194660] >fff00000c4227300: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 22.195318] ^ [ 22.196300] fff00000c4227380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.197392] fff00000c4227400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.198336] ==================================================================
[ 18.684736] ================================================================== [ 18.685678] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d8/0x560 [ 18.686255] Read of size 8 at addr ffff88810230cf00 by task kunit_try_catch/205 [ 18.686756] [ 18.687017] CPU: 1 UID: 0 PID: 205 Comm: kunit_try_catch Tainted: G B N 6.12.33-rc1 #1 [ 18.687137] Tainted: [B]=BAD_PAGE, [N]=TEST [ 18.687165] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 18.687196] Call Trace: [ 18.687414] <TASK> [ 18.687506] dump_stack_lvl+0x73/0xb0 [ 18.687583] print_report+0xd1/0x640 [ 18.687649] ? __virt_addr_valid+0x1db/0x2d0 [ 18.687723] ? workqueue_uaf+0x4d8/0x560 [ 18.687783] ? kasan_complete_mode_report_info+0x64/0x200 [ 18.687901] ? workqueue_uaf+0x4d8/0x560 [ 18.687965] kasan_report+0x140/0x180 [ 18.688041] ? workqueue_uaf+0x4d8/0x560 [ 18.688116] __asan_report_load8_noabort+0x18/0x20 [ 18.688186] workqueue_uaf+0x4d8/0x560 [ 18.688273] ? __pfx_workqueue_uaf+0x10/0x10 [ 18.688338] ? __schedule+0xc49/0x27a0 [ 18.688405] ? __pfx_read_tsc+0x10/0x10 [ 18.688474] ? ktime_get_ts64+0x84/0x230 [ 18.688532] kunit_try_run_case+0x1a6/0x480 [ 18.688566] ? __pfx_kunit_try_run_case+0x10/0x10 [ 18.688593] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 18.688620] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 18.688654] ? __kthread_parkme+0x82/0x160 [ 18.688680] ? preempt_count_sub+0x50/0x80 [ 18.688711] ? __pfx_kunit_try_run_case+0x10/0x10 [ 18.688738] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 18.688774] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 18.688840] kthread+0x257/0x310 [ 18.688869] ? __pfx_kthread+0x10/0x10 [ 18.688894] ret_from_fork+0x41/0x80 [ 18.688922] ? __pfx_kthread+0x10/0x10 [ 18.688946] ret_from_fork_asm+0x1a/0x30 [ 18.688987] </TASK> [ 18.689000] [ 18.713434] Allocated by task 205: [ 18.714494] kasan_save_stack+0x45/0x70 [ 18.715187] kasan_save_track+0x18/0x40 [ 18.715750] kasan_save_alloc_info+0x3b/0x50 [ 18.716551] __kasan_kmalloc+0xb7/0xc0 [ 18.717323] __kmalloc_cache_noprof+0x168/0x350 [ 18.718038] workqueue_uaf+0x153/0x560 [ 18.719268] kunit_try_run_case+0x1a6/0x480 [ 18.720243] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 18.721291] kthread+0x257/0x310 [ 18.722192] ret_from_fork+0x41/0x80 [ 18.722661] ret_from_fork_asm+0x1a/0x30 [ 18.723537] [ 18.723949] Freed by task 43: [ 18.724250] kasan_save_stack+0x45/0x70 [ 18.725010] kasan_save_track+0x18/0x40 [ 18.725601] kasan_save_free_info+0x3f/0x60 [ 18.726358] __kasan_slab_free+0x56/0x70 [ 18.726883] kfree+0x123/0x3d0 [ 18.727569] workqueue_uaf_work+0x12/0x20 [ 18.728211] process_one_work+0x5ee/0xf60 [ 18.728630] worker_thread+0x753/0x1200 [ 18.729172] kthread+0x257/0x310 [ 18.729793] ret_from_fork+0x41/0x80 [ 18.730289] ret_from_fork_asm+0x1a/0x30 [ 18.730860] [ 18.731079] Last potentially related work creation: [ 18.731555] kasan_save_stack+0x45/0x70 [ 18.732012] __kasan_record_aux_stack+0xae/0xc0 [ 18.732578] kasan_record_aux_stack_noalloc+0xf/0x20 [ 18.733057] __queue_work+0x67e/0xf70 [ 18.733415] queue_work_on+0x74/0xa0 [ 18.733960] workqueue_uaf+0x26e/0x560 [ 18.734374] kunit_try_run_case+0x1a6/0x480 [ 18.735287] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 18.735706] kthread+0x257/0x310 [ 18.736048] ret_from_fork+0x41/0x80 [ 18.736716] ret_from_fork_asm+0x1a/0x30 [ 18.737152] [ 18.737395] The buggy address belongs to the object at ffff88810230cf00 [ 18.737395] which belongs to the cache kmalloc-32 of size 32 [ 18.738414] The buggy address is located 0 bytes inside of [ 18.738414] freed 32-byte region [ffff88810230cf00, ffff88810230cf20) [ 18.739451] [ 18.739690] The buggy address belongs to the physical page: [ 18.740176] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10230c [ 18.741392] flags: 0x200000000000000(node=0|zone=2) [ 18.741970] page_type: f5(slab) [ 18.742354] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 18.743151] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 18.743881] page dumped because: kasan: bad access detected [ 18.744334] [ 18.744921] Memory state around the buggy address: [ 18.745427] ffff88810230ce00: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 18.746140] ffff88810230ce80: 00 00 03 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 18.746862] >ffff88810230cf00: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 18.747417] ^ [ 18.747937] ffff88810230cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.748432] ffff88810230d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.749199] ==================================================================