Date
Nov. 20, 2024, 6:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 37.686156] ================================================================== [ 37.688360] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 37.689237] Read of size 8 at addr fff00000c65b0300 by task kunit_try_catch/189 [ 37.690089] [ 37.691270] CPU: 1 UID: 0 PID: 189 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241120 #1 [ 37.692486] Tainted: [B]=BAD_PAGE, [N]=TEST [ 37.693043] Hardware name: linux,dummy-virt (DT) [ 37.694189] Call trace: [ 37.694616] show_stack+0x20/0x38 (C) [ 37.695240] dump_stack_lvl+0x8c/0xd0 [ 37.695851] print_report+0x118/0x5e0 [ 37.696406] kasan_report+0xc8/0x118 [ 37.696897] __asan_report_load8_noabort+0x20/0x30 [ 37.697984] workqueue_uaf+0x480/0x4a8 [ 37.698577] kunit_try_run_case+0x14c/0x3d0 [ 37.699186] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 37.700271] kthread+0x24c/0x2d0 [ 37.700787] ret_from_fork+0x10/0x20 [ 37.701313] [ 37.702095] Allocated by task 189: [ 37.702473] kasan_save_stack+0x3c/0x68 [ 37.702880] kasan_save_track+0x20/0x40 [ 37.703961] kasan_save_alloc_info+0x40/0x58 [ 37.705046] __kasan_kmalloc+0xd4/0xd8 [ 37.705844] __kmalloc_cache_noprof+0x15c/0x3c8 [ 37.706654] workqueue_uaf+0x13c/0x4a8 [ 37.707157] kunit_try_run_case+0x14c/0x3d0 [ 37.707723] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 37.708377] kthread+0x24c/0x2d0 [ 37.708849] ret_from_fork+0x10/0x20 [ 37.710121] [ 37.710500] Freed by task 31: [ 37.711011] kasan_save_stack+0x3c/0x68 [ 37.711522] kasan_save_track+0x20/0x40 [ 37.712087] kasan_save_free_info+0x4c/0x78 [ 37.712734] __kasan_slab_free+0x6c/0x98 [ 37.713824] kfree+0x114/0x3d0 [ 37.714249] workqueue_uaf_work+0x18/0x30 [ 37.714851] process_one_work+0x530/0xfa8 [ 37.715358] worker_thread+0x614/0xf28 [ 37.715927] kthread+0x24c/0x2d0 [ 37.716470] ret_from_fork+0x10/0x20 [ 37.716920] [ 37.718458] Last potentially related work creation: [ 37.718946] kasan_save_stack+0x3c/0x68 [ 37.719481] __kasan_record_aux_stack+0xbc/0xe8 [ 37.720119] kasan_record_aux_stack_noalloc+0x14/0x20 [ 37.720777] __queue_work+0x654/0xfe0 [ 37.721255] queue_work_on+0xbc/0xf8 [ 37.721814] workqueue_uaf+0x210/0x4a8 [ 37.722372] kunit_try_run_case+0x14c/0x3d0 [ 37.723549] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 37.724215] kthread+0x24c/0x2d0 [ 37.724760] ret_from_fork+0x10/0x20 [ 37.725280] [ 37.725980] The buggy address belongs to the object at fff00000c65b0300 [ 37.725980] which belongs to the cache kmalloc-32 of size 32 [ 37.727594] The buggy address is located 0 bytes inside of [ 37.727594] freed 32-byte region [fff00000c65b0300, fff00000c65b0320) [ 37.729203] [ 37.729910] The buggy address belongs to the physical page: [ 37.730783] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1065b0 [ 37.731683] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 37.732456] page_type: f5(slab) [ 37.732940] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 37.733796] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 37.734593] page dumped because: kasan: bad access detected [ 37.735258] [ 37.736128] Memory state around the buggy address: [ 37.737255] fff00000c65b0200: fa fb fb fb fc fc fc fc 00 00 00 fc fc fc fc fc [ 37.738273] fff00000c65b0280: 00 00 00 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 37.739188] >fff00000c65b0300: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 37.740023] ^ [ 37.740502] fff00000c65b0380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.741153] fff00000c65b0400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.742493] ==================================================================
[ 29.272196] ================================================================== [ 29.273257] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d8/0x560 [ 29.274399] Read of size 8 at addr ffff8881029e55c0 by task kunit_try_catch/207 [ 29.275866] [ 29.276045] CPU: 1 UID: 0 PID: 207 Comm: kunit_try_catch Tainted: G B N 6.12.0-next-20241120 #1 [ 29.277576] Tainted: [B]=BAD_PAGE, [N]=TEST [ 29.278135] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 29.279504] Call Trace: [ 29.280066] <TASK> [ 29.280632] dump_stack_lvl+0x73/0xb0 [ 29.281450] print_report+0xd1/0x640 [ 29.281987] ? __virt_addr_valid+0x1db/0x2d0 [ 29.282726] ? kasan_complete_mode_report_info+0x64/0x200 [ 29.283315] kasan_report+0x102/0x140 [ 29.284299] ? workqueue_uaf+0x4d8/0x560 [ 29.284930] ? workqueue_uaf+0x4d8/0x560 [ 29.285789] __asan_report_load8_noabort+0x18/0x20 [ 29.286598] workqueue_uaf+0x4d8/0x560 [ 29.287151] ? __pfx_workqueue_uaf+0x10/0x10 [ 29.288364] ? __pfx_workqueue_uaf+0x10/0x10 [ 29.288750] kunit_try_run_case+0x1b3/0x490 [ 29.289515] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.290255] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 29.290921] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 29.291711] ? __kthread_parkme+0x82/0x160 [ 29.292804] ? preempt_count_sub+0x50/0x80 [ 29.293376] ? __pfx_kunit_try_run_case+0x10/0x10 [ 29.294300] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 29.294919] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.296715] kthread+0x257/0x310 [ 29.297473] ? __pfx_kthread+0x10/0x10 [ 29.297788] ret_from_fork+0x41/0x80 [ 29.298022] ? __pfx_kthread+0x10/0x10 [ 29.298225] ret_from_fork_asm+0x1a/0x30 [ 29.298430] </TASK> [ 29.298549] [ 29.298643] Allocated by task 207: [ 29.299012] kasan_save_stack+0x3d/0x60 [ 29.300424] kasan_save_track+0x18/0x40 [ 29.302630] kasan_save_alloc_info+0x3b/0x50 [ 29.304200] __kasan_kmalloc+0xb7/0xc0 [ 29.305085] __kmalloc_cache_noprof+0x184/0x410 [ 29.306586] workqueue_uaf+0x153/0x560 [ 29.306858] kunit_try_run_case+0x1b3/0x490 [ 29.307116] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.307413] kthread+0x257/0x310 [ 29.308098] ret_from_fork+0x41/0x80 [ 29.308643] ret_from_fork_asm+0x1a/0x30 [ 29.309606] [ 29.309898] Freed by task 43: [ 29.310336] kasan_save_stack+0x3d/0x60 [ 29.310976] kasan_save_track+0x18/0x40 [ 29.311510] kasan_save_free_info+0x3f/0x60 [ 29.312275] __kasan_slab_free+0x56/0x70 [ 29.313244] kfree+0x123/0x3f0 [ 29.313893] workqueue_uaf_work+0x12/0x20 [ 29.314205] process_one_work+0x5ee/0xf60 [ 29.314576] worker_thread+0x720/0x1300 [ 29.315901] kthread+0x257/0x310 [ 29.316818] ret_from_fork+0x41/0x80 [ 29.317194] ret_from_fork_asm+0x1a/0x30 [ 29.317855] [ 29.318038] Last potentially related work creation: [ 29.318502] kasan_save_stack+0x3d/0x60 [ 29.319551] __kasan_record_aux_stack+0xae/0xc0 [ 29.320411] kasan_record_aux_stack_noalloc+0xf/0x20 [ 29.320846] __queue_work+0x67e/0xf70 [ 29.321233] queue_work_on+0x74/0xa0 [ 29.321605] workqueue_uaf+0x26e/0x560 [ 29.322017] kunit_try_run_case+0x1b3/0x490 [ 29.322455] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 29.324339] kthread+0x257/0x310 [ 29.325079] ret_from_fork+0x41/0x80 [ 29.325808] ret_from_fork_asm+0x1a/0x30 [ 29.326248] [ 29.326867] The buggy address belongs to the object at ffff8881029e55c0 [ 29.326867] which belongs to the cache kmalloc-32 of size 32 [ 29.328514] The buggy address is located 0 bytes inside of [ 29.328514] freed 32-byte region [ffff8881029e55c0, ffff8881029e55e0) [ 29.329646] [ 29.330625] The buggy address belongs to the physical page: [ 29.331265] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1029e5 [ 29.331809] flags: 0x200000000000000(node=0|zone=2) [ 29.332501] page_type: f5(slab) [ 29.332859] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 29.333820] raw: 0000000000000000 0000000080400040 00000001f5000000 0000000000000000 [ 29.334476] page dumped because: kasan: bad access detected [ 29.335149] [ 29.335337] Memory state around the buggy address: [ 29.335976] ffff8881029e5480: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 29.336735] ffff8881029e5500: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 29.337903] >ffff8881029e5580: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 29.339122] ^ [ 29.339918] ffff8881029e5600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.340951] ffff8881029e5680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.342357] ==================================================================