Warning: Permanently added '10.128.0.107' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 839.294643] kauditd_printk_skb: 5 callbacks suppressed [ 839.294667] audit: type=1400 audit(1563770500.497:36): avc: denied { map } for pid=8018 comm="syz-executor944" path="/root/syz-executor944576144" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 989.759684] ================================================================== [ 989.767371] BUG: KASAN: use-after-free in debugfs_remove+0x10d/0x130 [ 989.767386] Read of size 8 at addr ffff88808d6504e0 by task kworker/1:0/19 [ 989.767390] [ 989.767412] CPU: 1 PID: 19 Comm: kworker/1:0 Not tainted 4.19.60 #33 [ 989.767430] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 989.767460] Workqueue: events __blk_release_queue [ 989.781315] Call Trace: [ 989.781373] dump_stack+0x172/0x1f0 [ 989.781393] ? debugfs_remove+0x10d/0x130 [ 989.789574] print_address_description.cold+0x7c/0x20d [ 989.789593] ? debugfs_remove+0x10d/0x130 [ 989.789608] kasan_report.cold+0x8c/0x2ba [ 989.789628] __asan_report_load8_noabort+0x14/0x20 [ 989.789640] debugfs_remove+0x10d/0x130 [ 989.789676] blk_trace_free+0x38/0x140 [ 989.789693] __blk_trace_remove+0x78/0xa0 [ 989.803989] blk_trace_shutdown+0x67/0x90 [ 989.804009] __blk_release_queue+0x225/0x4f0 [ 989.804048] process_one_work+0x989/0x1750 [ 989.804071] ? pwq_dec_nr_in_flight+0x320/0x320 [ 989.804093] ? lock_acquire+0x16f/0x3f0 [ 989.804115] ? kasan_check_write+0x14/0x20 [ 989.810351] ? do_raw_spin_lock+0xc8/0x240 [ 989.810373] worker_thread+0x98/0xe40 [ 989.810402] kthread+0x354/0x420 [ 989.810420] ? process_one_work+0x1750/0x1750 [ 989.819862] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 989.819904] ret_from_fork+0x24/0x30 [ 989.819923] [ 989.819940] Allocated by task 10944: [ 989.819955] save_stack+0x45/0xd0 [ 989.819965] kasan_kmalloc+0xce/0xf0 [ 989.828498] kasan_slab_alloc+0xf/0x20 [ 989.828511] kmem_cache_alloc+0x12e/0x700 [ 989.828537] __d_alloc+0x2e/0x9c0 [ 989.828549] d_alloc+0x4d/0x280 [ 989.828566] d_alloc_parallel+0xf4/0x1bb0 [ 989.838189] __lookup_slow+0x1ab/0x500 [ 989.838203] lookup_one_len+0x16d/0x1a0 [ 989.838216] start_creating+0xbf/0x1e0 [ 989.838228] __debugfs_create_file+0x65/0x400 [ 989.838239] debugfs_create_file+0x5a/0x70 [ 989.838256] do_blk_trace_setup+0x376/0xb90 [ 989.847830] __blk_trace_setup+0xe3/0x190 [ 989.847841] blk_trace_ioctl+0x170/0x300 [ 989.847873] blkdev_ioctl+0x126/0x1ac0 [ 989.847897] block_ioctl+0xee/0x130 [ 989.847909] do_vfs_ioctl+0xd5f/0x1380 [ 989.847918] ksys_ioctl+0xab/0xd0 [ 989.847934] __x64_sys_ioctl+0x73/0xb0 [ 989.857037] do_syscall_64+0xfd/0x620 [ 989.857053] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 989.857058] [ 989.857063] Freed by task 18: [ 989.857085] save_stack+0x45/0xd0 [ 989.857102] __kasan_slab_free+0x102/0x150 [ 989.872407] kasan_slab_free+0xe/0x10 [ 989.872420] kmem_cache_free+0x86/0x260 [ 989.872432] __d_free+0x20/0x30 [ 989.872465] rcu_process_callbacks+0xba0/0x1a30 [ 989.872490] __do_softirq+0x25c/0x921 [ 989.881053] [ 989.881066] The buggy address belongs to the object at ffff88808d6504a0 [ 989.881066] which belongs to the cache dentry of size 288 [ 989.881077] The buggy address is located 64 bytes inside of [ 989.881077] 288-byte region [ffff88808d6504a0, ffff88808d6505c0) [ 989.881082] The buggy address belongs to the page: [ 989.881104] page:ffffea0002359400 count:1 mapcount:0 mapping:ffff88812c297840 index:0x0 [ 989.881127] flags: 0x1fffc0000000100(slab) [ 989.893394] raw: 01fffc0000000100 ffffea000235a048 ffffea0002359488 ffff88812c297840 [ 989.893409] raw: 0000000000000000 ffff88808d650080 000000010000000b 0000000000000000 [ 989.893415] page dumped because: kasan: bad access detected [ 989.893420] [ 989.893424] Memory state around the buggy address: [ 989.893437] ffff88808d650380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 989.893446] ffff88808d650400: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 989.893459] >ffff88808d650480: fc fc fc fc fb fb fb fb fb fb fb fb fb fb fb fb [ 990.124271] ^ [ 990.131510] ffff88808d650500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 990.138956] ffff88808d650580: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 990.146590] ================================================================== [ 990.154167] Disabling lock debugging due to kernel taint [ 990.159800] Kernel panic - not syncing: panic_on_warn set ... [ 990.159800] [ 990.167351] CPU: 1 PID: 19 Comm: kworker/1:0 Tainted: G B 4.19.60 #33 [ 990.175580] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 990.184953] Workqueue: events __blk_release_queue [ 990.190022] Call Trace: [ 990.192924] dump_stack+0x172/0x1f0 [ 990.197069] ? debugfs_remove+0x10d/0x130 [ 990.202127] panic+0x263/0x507 [ 990.205364] ? __warn_printk+0xf3/0xf3 [ 990.209575] ? debugfs_remove+0x10d/0x130 [ 990.214091] ? preempt_schedule+0x4b/0x60 [ 990.218536] ? ___preempt_schedule+0x16/0x18 [ 990.222998] ? trace_hardirqs_on+0x5e/0x220 [ 990.227378] ? debugfs_remove+0x10d/0x130 [ 990.231532] kasan_end_report+0x47/0x4f [ 990.235774] kasan_report.cold+0xa9/0x2ba [ 990.239979] __asan_report_load8_noabort+0x14/0x20 [ 990.245013] debugfs_remove+0x10d/0x130 [ 990.249379] blk_trace_free+0x38/0x140 [ 990.253266] __blk_trace_remove+0x78/0xa0 [ 990.257409] blk_trace_shutdown+0x67/0x90 [ 990.261548] __blk_release_queue+0x225/0x4f0 [ 990.265971] process_one_work+0x989/0x1750 [ 990.270317] ? pwq_dec_nr_in_flight+0x320/0x320 [ 990.275027] ? lock_acquire+0x16f/0x3f0 [ 990.279648] ? kasan_check_write+0x14/0x20 [ 990.283894] ? do_raw_spin_lock+0xc8/0x240 [ 990.288331] worker_thread+0x98/0xe40 [ 990.292387] kthread+0x354/0x420 [ 990.295832] ? process_one_work+0x1750/0x1750 [ 990.300453] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 990.306828] ret_from_fork+0x24/0x30 [ 990.312201] Kernel Offset: disabled [ 990.316194] Rebooting in 86400 seconds..