EXT4-fs (loop0): Unrecognized mount option "GÖ{U8ú" or missing value EXT4-fs (loop0): Unrecognized mount option "GÖ{U8ú" or missing value INFO: task kworker/0:3:8614 blocked for more than 140 seconds. Not tainted 4.14.232-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:3 D26616 8614 2 0x80000000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x88b/0x1de0 kernel/sched/core.c:3384 schedule+0x8d/0x1b0 kernel/sched/core.c:3428 usb_kill_urb.part.0+0x125/0x190 drivers/usb/core/urb.c:691 usb_kill_urb+0x7c/0x90 drivers/usb/core/urb.c:686 usb_start_wait_urb+0x209/0x440 drivers/usb/core/message.c:62 usb_internal_control_msg drivers/usb/core/message.c:100 [inline] usb_control_msg+0x302/0x450 drivers/usb/core/message.c:151 hub_port_init+0xfdc/0x2970 drivers/usb/core/hub.c:4555 hub_port_connect drivers/usb/core/hub.c:4905 [inline] hub_port_connect_change drivers/usb/core/hub.c:5088 [inline] port_event drivers/usb/core/hub.c:5194 [inline] hub_event+0x18fd/0x3d70 drivers/usb/core/hub.c:5274 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Showing all locks held in the system: 1 lock held by khungtaskd/1533: #0: (tasklist_lock){.+.?}, at: [] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4548 5 locks held by kworker/0:3/8614: #0: ("usb_hub_wq"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2087 #1: ((&hub->events)){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2091 #2: (&dev->mutex){....}, at: [] device_lock include/linux/device.h:1081 [inline] #2: (&dev->mutex){....}, at: [] hub_event+0x108/0x3d70 drivers/usb/core/hub.c:5220 #3: (&port_dev->status_lock){+.+.}, at: [] usb_lock_port drivers/usb/core/hub.c:2934 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect drivers/usb/core/hub.c:4904 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_port_connect_change drivers/usb/core/hub.c:5088 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] port_event drivers/usb/core/hub.c:5194 [inline] #3: (&port_dev->status_lock){+.+.}, at: [] hub_event+0x18e8/0x3d70 drivers/usb/core/hub.c:5274 #4: (hcd->address0_mutex){+.+.}, at: [] hub_port_init+0x15b/0x2970 drivers/usb/core/hub.c:4429 1 lock held by syz-executor.4/28965: #0: (&type->i_mutex_dir_key#9){++++}, at: [] inode_lock_shared include/linux/fs.h:729 [inline] #0: (&type->i_mutex_dir_key#9){++++}, at: [] lookup_slow+0x129/0x400 fs/namei.c:1674 1 lock held by syz-executor.4/28972: #0: (&type->i_mutex_dir_key#9){++++}, at: [] inode_lock_shared include/linux/fs.h:729 [inline] #0: (&type->i_mutex_dir_key#9){++++}, at: [] do_last fs/namei.c:3333 [inline] #0: (&type->i_mutex_dir_key#9){++++}, at: [] path_openat+0x149b/0x2970 fs/namei.c:3569 1 lock held by syz-executor.4/28983: #0: (&type->i_mutex_dir_key#9){++++}, at: [] inode_lock_shared include/linux/fs.h:729 [inline] #0: (&type->i_mutex_dir_key#9){++++}, at: [] lookup_slow+0x129/0x400 fs/namei.c:1674 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1533 Comm: khungtaskd Not tainted 4.14.232-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x13a/0x180 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5b9/0xb40 kernel/hung_task.c:274 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7711 Comm: rs:main Q:Reg Not tainted 4.14.232-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880ac39e0c0 task.stack: ffff88808fdf8000 RIP: 0010:blk_bio_segment_split block/blk-merge.c:107 [inline] RIP: 0010:blk_queue_split+0x1379/0x1610 block/blk-merge.c:201 RSP: 0018:ffff88808fdff700 EFLAGS: 00000246 RAX: 0000000000000007 RBX: ffff8880abd62c00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880abd62c3c RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000002 R10: 0000000000000000 R11: ffff8880ac39e0c0 R12: 0000000000040000 R13: ffff88808fdff888 R14: 0000000000000200 R15: 0000000000000000 FS: 00007f68e0cac700(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f68d800a020 CR3: 0000000093ed5000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: blk_mq_make_request+0x131/0x1ad0 block/blk-mq.c:1653 generic_make_request block/blk-core.c:2229 [inline] generic_make_request+0x1f6/0x850 block/blk-core.c:2173 submit_bio+0x234/0x390 block/blk-core.c:2303 submit_bio_wait+0xe8/0x140 block/bio.c:1012 blkdev_issue_flush+0x218/0x320 block/blk-flush.c:531 ext4_sync_file+0xb6c/0x12c0 fs/ext4/fsync.c:155 vfs_fsync_range+0x103/0x260 fs/sync.c:196 generic_write_sync include/linux/fs.h:2682 [inline] ext4_file_write_iter+0x5fa/0xd20 fs/ext4/file.c:281 call_write_iter include/linux/fs.h:1778 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x44c/0x630 fs/read_write.c:482 vfs_write+0x17f/0x4d0 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xf2/0x210 fs/read_write.c:582 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f68e36f01cd RSP: 002b:00007f68e0cab590 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f68d80233a0 RCX: 00007f68e36f01cd RDX: 00000000000003e8 RSI: 00007f68d80233a0 RDI: 0000000000000008 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f68d8023120 R13: 00007f68e0cab5b0 R14: 000055a2e5222440 R15: 00000000000003e8 Code: e8 dd 0b 76 fe e9 98 f0 ff ff e8 73 0a 76 fe e9 50 f5 ff ff e8 39 0c 76 fe e9 f1 f0 ff ff 4c 89 e7 e8 2c 0c 76 fe e9 51 f0 ff ff 44 24 18 00 00 00 00 e9 9e fd ff ff e8 a5 0b 76 fe e9 94 f0