Date
March 19, 2025, 10:35 a.m.
| Environment | |
|---|---|
| qemu-arm64 | |
| qemu-x86_64 |
[ 35.073664] ================================================================== [ 35.074110] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x480/0x4a8 [ 35.074282] Read of size 8 at addr fff00000c5d93440 by task kunit_try_catch/202 [ 35.074455] [ 35.074564] CPU: 1 UID: 0 PID: 202 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT [ 35.074846] Tainted: [B]=BAD_PAGE, [N]=TEST [ 35.074939] Hardware name: linux,dummy-virt (DT) [ 35.075034] Call trace: [ 35.075119] show_stack+0x20/0x38 (C) [ 35.075273] dump_stack_lvl+0x8c/0xd0 [ 35.075425] print_report+0x118/0x5f0 [ 35.075566] kasan_report+0xc8/0x118 [ 35.076085] __asan_report_load8_noabort+0x20/0x30 [ 35.077104] workqueue_uaf+0x480/0x4a8 [ 35.077289] kunit_try_run_case+0x14c/0x3d0 [ 35.077449] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 35.077615] kthread+0x318/0x618 [ 35.077774] ret_from_fork+0x10/0x20 [ 35.078158] [ 35.078280] Allocated by task 202: [ 35.078624] kasan_save_stack+0x3c/0x68 [ 35.079358] kasan_save_track+0x20/0x40 [ 35.079520] kasan_save_alloc_info+0x40/0x58 [ 35.079739] __kasan_kmalloc+0xd4/0xd8 [ 35.079873] __kmalloc_cache_noprof+0x15c/0x3c0 [ 35.080016] workqueue_uaf+0x13c/0x4a8 [ 35.080158] kunit_try_run_case+0x14c/0x3d0 [ 35.080290] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 35.080511] kthread+0x318/0x618 [ 35.080722] ret_from_fork+0x10/0x20 [ 35.080943] [ 35.081018] Freed by task 50: [ 35.081148] kasan_save_stack+0x3c/0x68 [ 35.081963] kasan_save_track+0x20/0x40 [ 35.082485] kasan_save_free_info+0x4c/0x78 [ 35.083138] __kasan_slab_free+0x6c/0x98 [ 35.083339] kfree+0x214/0x3c8 [ 35.084395] workqueue_uaf_work+0x18/0x30 [ 35.085797] process_one_work+0x530/0xf98 [ 35.086722] worker_thread+0x644/0xf48 [ 35.086799] kthread+0x318/0x618 [ 35.086859] ret_from_fork+0x10/0x20 [ 35.087030] [ 35.087117] Last potentially related work creation: [ 35.087217] kasan_save_stack+0x3c/0x68 [ 35.087614] kasan_record_aux_stack+0xb4/0xc8 [ 35.087749] __queue_work+0x65c/0x1018 [ 35.087867] queue_work_on+0xbc/0xf8 [ 35.087983] workqueue_uaf+0x210/0x4a8 [ 35.088120] kunit_try_run_case+0x14c/0x3d0 [ 35.088307] kunit_generic_run_threadfn_adapter+0x88/0x100 [ 35.088913] kthread+0x318/0x618 [ 35.089192] ret_from_fork+0x10/0x20 [ 35.089580] [ 35.089635] The buggy address belongs to the object at fff00000c5d93440 [ 35.089635] which belongs to the cache kmalloc-32 of size 32 [ 35.089741] The buggy address is located 0 bytes inside of [ 35.089741] freed 32-byte region [fff00000c5d93440, fff00000c5d93460) [ 35.089841] [ 35.089875] The buggy address belongs to the physical page: [ 35.089929] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x105d93 [ 35.090015] flags: 0xbfffe0000000000(node=0|zone=2|lastcpupid=0x1ffff) [ 35.090157] page_type: f5(slab) [ 35.090645] raw: 0bfffe0000000000 fff00000c0001780 dead000000000122 0000000000000000 [ 35.090872] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 35.091093] page dumped because: kasan: bad access detected [ 35.091259] [ 35.091321] Memory state around the buggy address: [ 35.091432] fff00000c5d93300: 00 00 00 fc fc fc fc fc 00 00 03 fc fc fc fc fc [ 35.091599] fff00000c5d93380: 00 00 07 fc fc fc fc fc 00 00 00 fc fc fc fc fc [ 35.091747] >fff00000c5d93400: 00 00 00 07 fc fc fc fc fa fb fb fb fc fc fc fc [ 35.091880] ^ [ 35.091993] fff00000c5d93480: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.092146] fff00000c5d93500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.092270] ==================================================================
[ 22.843828] ================================================================== [ 22.844674] BUG: KASAN: slab-use-after-free in workqueue_uaf+0x4d6/0x560 [ 22.845303] Read of size 8 at addr ffff88810321af00 by task kunit_try_catch/221 [ 22.846012] [ 22.847014] CPU: 1 UID: 0 PID: 221 Comm: kunit_try_catch Tainted: G B N 6.14.0-rc7-next-20250319 #1 PREEMPT(voluntary) [ 22.847173] Tainted: [B]=BAD_PAGE, [N]=TEST [ 22.847209] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 22.847264] Call Trace: [ 22.847297] <TASK> [ 22.847336] dump_stack_lvl+0x73/0xb0 [ 22.847419] print_report+0xd1/0x660 [ 22.847481] ? __virt_addr_valid+0x1db/0x2d0 [ 22.847632] ? kasan_complete_mode_report_info+0x64/0x200 [ 22.847959] kasan_report+0x104/0x140 [ 22.848035] ? workqueue_uaf+0x4d6/0x560 [ 22.848075] ? workqueue_uaf+0x4d6/0x560 [ 22.848138] __asan_report_load8_noabort+0x18/0x20 [ 22.848172] workqueue_uaf+0x4d6/0x560 [ 22.848206] ? __pfx_workqueue_uaf+0x10/0x10 [ 22.848239] ? __schedule+0xd46/0x29c0 [ 22.848272] ? __pfx_read_tsc+0x10/0x10 [ 22.848303] ? ktime_get_ts64+0x86/0x240 [ 22.848342] kunit_try_run_case+0x1b2/0x490 [ 22.848379] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.848411] ? _raw_spin_lock_irqsave+0xa1/0x100 [ 22.848441] ? _raw_spin_unlock_irqrestore+0x5f/0x90 [ 22.848472] ? __kthread_parkme+0x82/0x160 [ 22.848503] ? preempt_count_sub+0x50/0x80 [ 22.848539] ? __pfx_kunit_try_run_case+0x10/0x10 [ 22.848572] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.848604] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 [ 22.848637] kthread+0x323/0x710 [ 22.848665] ? calculate_sigpending+0x7b/0xa0 [ 22.848881] ? trace_preempt_on+0x20/0xc0 [ 22.848923] ? __pfx_kthread+0x10/0x10 [ 22.848955] ? _raw_spin_unlock_irq+0x47/0x80 [ 22.848985] ? calculate_sigpending+0x7b/0xa0 [ 22.849015] ? __pfx_kthread+0x10/0x10 [ 22.849047] ret_from_fork+0x41/0x80 [ 22.849080] ? __pfx_kthread+0x10/0x10 [ 22.849128] ret_from_fork_asm+0x1a/0x30 [ 22.849177] </TASK> [ 22.849193] [ 22.875537] Allocated by task 221: [ 22.876337] kasan_save_stack+0x3d/0x60 [ 22.876622] kasan_save_track+0x18/0x40 [ 22.877225] kasan_save_alloc_info+0x3b/0x50 [ 22.877861] __kasan_kmalloc+0xb7/0xc0 [ 22.878365] __kmalloc_cache_noprof+0x183/0x410 [ 22.879086] workqueue_uaf+0x152/0x560 [ 22.879554] kunit_try_run_case+0x1b2/0x490 [ 22.880430] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.881230] kthread+0x323/0x710 [ 22.881582] ret_from_fork+0x41/0x80 [ 22.882165] ret_from_fork_asm+0x1a/0x30 [ 22.882585] [ 22.883089] Freed by task 24: [ 22.883436] kasan_save_stack+0x3d/0x60 [ 22.884255] kasan_save_track+0x18/0x40 [ 22.884728] kasan_save_free_info+0x3f/0x60 [ 22.885201] __kasan_slab_free+0x56/0x70 [ 22.885570] kfree+0x222/0x3f0 [ 22.885943] workqueue_uaf_work+0x12/0x20 [ 22.886599] process_one_work+0x5fe/0xf80 [ 22.887174] worker_thread+0x703/0x12a0 [ 22.887624] kthread+0x323/0x710 [ 22.888482] ret_from_fork+0x41/0x80 [ 22.889140] ret_from_fork_asm+0x1a/0x30 [ 22.889566] [ 22.889932] Last potentially related work creation: [ 22.890444] kasan_save_stack+0x3d/0x60 [ 22.891155] kasan_record_aux_stack+0xb2/0xc0 [ 22.891582] __queue_work+0x626/0xf50 [ 22.892426] queue_work_on+0xb6/0xc0 [ 22.893049] workqueue_uaf+0x26d/0x560 [ 22.893485] kunit_try_run_case+0x1b2/0x490 [ 22.894106] kunit_generic_run_threadfn_adapter+0x85/0xf0 [ 22.894627] kthread+0x323/0x710 [ 22.895255] ret_from_fork+0x41/0x80 [ 22.895691] ret_from_fork_asm+0x1a/0x30 [ 22.896601] [ 22.897022] The buggy address belongs to the object at ffff88810321af00 [ 22.897022] which belongs to the cache kmalloc-32 of size 32 [ 22.897910] The buggy address is located 0 bytes inside of [ 22.897910] freed 32-byte region [ffff88810321af00, ffff88810321af20) [ 22.899073] [ 22.899374] The buggy address belongs to the physical page: [ 22.900254] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10321a [ 22.901130] flags: 0x200000000000000(node=0|zone=2) [ 22.901649] page_type: f5(slab) [ 22.902268] raw: 0200000000000000 ffff888100041780 dead000000000122 0000000000000000 [ 22.903039] raw: 0000000000000000 0000000080400040 00000000f5000000 0000000000000000 [ 22.904087] page dumped because: kasan: bad access detected [ 22.904517] [ 22.904947] Memory state around the buggy address: [ 22.905400] ffff88810321ae00: 00 00 00 fc fc fc fc fc 00 00 03 fc fc fc fc fc [ 22.906218] ffff88810321ae80: 00 00 07 fc fc fc fc fc 00 00 00 07 fc fc fc fc [ 22.906967] >ffff88810321af00: fa fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 22.907630] ^ [ 22.908452] ffff88810321af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.909233] ffff88810321b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.910012] ==================================================================