Date
Dec. 4, 2024, 3:07 p.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 33.133399] ================================================================== [ 33.135468] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 33.136326] Read of size 8 at addr fff00000c6609440 by task kunit_try_catch/188 [ 33.137242] [ 33.138417] CPU: 0 UID: 0 PID: 188 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241204 #1 [ 33.139816] Tainted: [B]=BAD_PAGE, [N]=TEST [ 33.140340] Hardware name: linux,dummy-virt (DT) [ 33.140857] Call trace: [ 33.141340] show_stack+0x20/0x38 (C) [ 33.142123] dump_stack_lvl+0x8c/0xd0 [ 33.143232] print_report+0x118/0x5e0 [ 33.143723] kasan_report+0xc8/0x118 [ 33.144571] __asan_report_load8_noabort+0x20/0x30 [ 33.145543] workqueue_uaf+0x480/0x4a8 [ 33.146189] kunit_try_run_case+0x14c/0x3d0 [ 33.146930] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.148144] kthread+0x24c/0x2d0 [ 33.148805] ret_from_fork+0x10/0x20 [ 33.149439] [ 33.149770] Allocated by task 188: [ 33.150450] kasan_save_stack+0x3c/0x68 [ 33.151745] kasan_save_track+0x20/0x40 [ 33.152790] kasan_save_alloc_info+0x40/0x58 [ 33.153271] __kasan_kmalloc+0xd4/0xd8 [ 33.153847] __kmalloc_cache_noprof+0x15c/0x3c0 [ 33.155080] workqueue_uaf+0x13c/0x4a8 [ 33.155673] kunit_try_run_case+0x14c/0x3d0 [ 33.156473] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.157193] kthread+0x24c/0x2d0 [ 33.157935] ret_from_fork+0x10/0x20 [ 33.158442] [ 33.158739] Freed by task 8: [ 33.159242] kasan_save_stack+0x3c/0x68 [ 33.160738] kasan_save_track+0x20/0x40 [ 33.161222] kasan_save_free_info+0x4c/0x78 [ 33.161821] __kasan_slab_free+0x6c/0x98 [ 33.162279] kfree+0x114/0x3c8 [ 33.163288] workqueue_uaf_work+0x18/0x30 [ 33.163822] process_one_work+0x530/0xf98 [ 33.164449] worker_thread+0x614/0xf28 [ 33.164994] kthread+0x24c/0x2d0 [ 33.165578] ret_from_fork+0x10/0x20 [ 33.166777] [ 33.167128] Last potentially related work creation: [ 33.167618] kasan_save_stack+0x3c/0x68 [ 33.168320] kasan_record_aux_stack+0xb4/0xc8 [ 33.170109] __queue_work+0x65c/0xfd8 [ 33.170676] queue_work_on+0xbc/0xf8 [ 33.171247] workqueue_uaf+0x210/0x4a8 [ 33.171908] kunit_try_run_case+0x14c/0x3d0 [ 33.172497] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 33.173189] kthread+0x24c/0x2d0 [ 33.173692] ret_from_fork+0x10/0x20 [ 33.174690] [ 33.174999] The buggy address belongs to the object at fff00000c6609440 [ 33.174999] which belongs to the cache kmalloc-32 of size 32 [ 33.176406] The buggy address is located 0 bytes inside of [ 33.176406] freed 32-byte region [fff00000c6609440, fff00000c6609460) [ 33.178751] [ 33.179162] The buggy address belongs to the physical page: [ 33.180311] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x106609 [ 33.181437] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 33.182141] page_type: f5(slab) [ 33.182731] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 33.184394] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 33.185328] page dumped because: kasan: bad access detected [ 33.186620] [ 33.187320] Memory state around the buggy address: [ 33.188012] fff00000c6609300: 00 00 00 fc fc fc fc fc 00 00 05 fc fc fc fc fc [ 33.188993] fff00000c6609380: 00 00 07 fc fc fc fc fc 00 00 07 fc fc fc fc fc [ 33.189816] >fff00000c6609400: 00 00 00 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 33.191073] ^ [ 33.191805] fff00000c6609480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.192726] fff00000c6609500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.193531] ==================================================================
[ 23.937661] ================================================================== [ 23.940250] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d8/0x560 [ 23.940910] Read of size 8 at addr ffff888101aeabc0 by task kunit_try_catch/208 [ 23.942057] [ 23.943116] CPU: 0 UID: 0 PID: 208 Comm: kunit_try_catch Tainted: G B N 6.13.0-rc1-next-20241204 #1 [ 23.944756] Tainted: [B]=BAD_PAGE, [N]=TEST [ 23.945326] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 23.946162] Call Trace: [ 23.946500] <TASK> [ 23.946801] dump_stack_lvl+0x73/0xb0 [ 23.947689] print_report+0xd1/0x640 [ 23.948135] ? __virt_addr_valid+0x1db/0x2d0 [ 23.948780] ? kasan_complete_mode_report_info+0x64/0x200 [ 23.949233] kasan_report+0x102/0x140 [ 23.950489] ? workqueue_uaf+0x4d8/0x560 [ 23.950879] ? workqueue_uaf+0x4d8/0x560 [ 23.951301] __asan_report_load8_noabort+0x18/0x20 [ 23.951715] workqueue_uaf+0x4d8/0x560 [ 23.952753] ? __pfx_workqueue_uaf+0x10/0x10 [ 23.953213] ? __pfx_workqueue_uaf+0x10/0x10 [ 23.954096] kunit_try_run_case+0x1b3/0x490 [ 23.955028] ? __pfx_kunit_try_run_case+0x10/0x10 [ 23.955504] ? _raw_spin_lock_irqsave+0xa2/0x110 [ 23.956703] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 23.957420] ? __kthread_parkme+0x82/0x160 [ 23.958321] ? preempt_count_sub+0x50/0x80 [ 23.958786] ? __pfx_kunit_try_run_case+0x10/0x10 [ 23.959258] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 23.960681] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 23.961220] kthread+0x257/0x310 [ 23.961614] ? __pfx_kthread+0x10/0x10 [ 23.962526] ret_from_fork+0x41/0x80 [ 23.962859] ? __pfx_kthread+0x10/0x10 [ 23.963269] ret_from_fork_asm+0x1a/0x30 [ 23.964335] </TASK> [ 23.965102] [ 23.965365] Allocated by task 208: [ 23.966539] kasan_save_stack+0x3d/0x60 [ 23.966952] kasan_save_track+0x18/0x40 [ 23.968139] kasan_save_alloc_info+0x3b/0x50 [ 23.969038] __kasan_kmalloc+0xb7/0xc0 [ 23.969683] __kmalloc_cache_noprof+0x184/0x410 [ 23.970188] workqueue_uaf+0x153/0x560 [ 23.970470] kunit_try_run_case+0x1b3/0x490 [ 23.971709] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 23.972109] kthread+0x257/0x310 [ 23.973145] ret_from_fork+0x41/0x80 [ 23.973912] ret_from_fork_asm+0x1a/0x30 [ 23.974459] [ 23.974660] Freed by task 8: [ 23.975161] kasan_save_stack+0x3d/0x60 [ 23.975820] kasan_save_track+0x18/0x40 [ 23.976140] kasan_save_free_info+0x3f/0x60 [ 23.976857] __kasan_slab_free+0x56/0x70 [ 23.978222] kfree+0x123/0x3f0 [ 23.978621] workqueue_uaf_work+0x12/0x20 [ 23.979117] process_one_work+0x5ee/0xf60 [ 23.980146] worker_thread+0x720/0x1300 [ 23.980555] kthread+0x257/0x310 [ 23.981030] ret_from_fork+0x41/0x80 [ 23.982094] ret_from_fork_asm+0x1a/0x30 [ 23.982452] [ 23.982611] Last potentially related work creation: [ 23.983296] kasan_save_stack+0x3d/0x60 [ 23.983890] kasan_record_aux_stack+0xb2/0xc0 [ 23.984364] __queue_work+0x626/0xe60 [ 23.984834] queue_work_on+0x74/0xa0 [ 23.985231] workqueue_uaf+0x26e/0x560 [ 23.985941] kunit_try_run_case+0x1b3/0x490 [ 23.986420] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 23.987110] kthread+0x257/0x310 [ 23.988139] ret_from_fork+0x41/0x80 [ 23.988440] ret_from_fork_asm+0x1a/0x30 [ 23.988980] [ 23.989934] The buggy address belongs to the object at ffff888101aeabc0 [ 23.989934] which belongs to the cache kmalloc-32 of size 32 [ 23.990792] The buggy address is located 0 bytes inside of [ 23.990792] freed 32-byte region [ffff888101aeabc0, ffff888101aeabe0) [ 23.992663] [ 23.992925] The buggy address belongs to the physical page: [ 23.993483] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101aea [ 23.994225] flags: 0x200000000000000(node=0|zone=2) [ 23.995108] page_type: f5(slab) [ 23.996320] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 23.997203] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 23.998441] page dumped because: kasan: bad access detected [ 23.998907] [ 23.999105] Memory state around the buggy address: [ 23.999591] ffff888101aeaa80: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc [ 24.000368] ffff888101aeab00: 00 00 00 fc fc fc fc fc 00 00 03 fc fc fc fc fc [ 24.001186] >ffff888101aeab80: 00 00 07 fc fc fc fc fc fa fb fb fb fc fc fc fc [ 24.002591] ^ [ 24.003105] ffff888101aeac00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.004140] ffff888101aeac80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.005006] ==================================================================