Bluetooth: hci5 command 0x0406 tx timeout Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci1 command 0x0406 tx timeout INFO: task syz-executor.3:9664 blocked for more than 140 seconds. Not tainted 4.14.231-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28064 9664 8318 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x519/0x1490 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 nbd_start_device_ioctl drivers/block/nbd.c:1265 [inline] __nbd_ioctl drivers/block/nbd.c:1334 [inline] nbd_ioctl+0x2ba/0xad0 drivers/block/nbd.c:1374 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7c0/0x1760 block/ioctl.c:594 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fc79033b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffdf92244bf R14: 00007fc79033b300 R15: 0000000000022000 INFO: task syz-executor.3:9721 blocked for more than 140 seconds. Not tainted 4.14.231-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D28968 9721 8318 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 blk_mq_freeze_queue_wait+0xfd/0x1e0 block/blk-mq.c:154 blk_freeze_queue+0x3d/0x60 block/blk-mq.c:183 blk_mq_freeze_queue+0x9/0x10 block/blk-mq.c:192 nbd_add_socket+0xfd/0x810 drivers/block/nbd.c:959 __nbd_ioctl drivers/block/nbd.c:1307 [inline] nbd_ioctl+0x485/0xad0 drivers/block/nbd.c:1374 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7c0/0x1760 block/ioctl.c:594 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fc7902f9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09 RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007ffdf92244bf R14: 00007fc7902f9300 R15: 0000000000022000 INFO: task syz-executor.3:9722 blocked for more than 140 seconds. Not tainted 4.14.231-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29336 9722 8318 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x519/0x1490 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7c0/0x1760 block/ioctl.c:594 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fc7902d8188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c158 RCX: 0000000000465b09 RDX: 0000000000000401 RSI: 000000000000ab09 RDI: 0000000000000006 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c158 R13: 00007ffdf92244bf R14: 00007fc7902d8300 R15: 0000000000022000 INFO: task syz-executor.3:9728 blocked for more than 140 seconds. Not tainted 4.14.231-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29736 9728 8318 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x519/0x1490 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7c0/0x1760 block/ioctl.c:594 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fc7902b7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c200 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c200 R13: 00007ffdf92244bf R14: 00007fc7902b7300 R15: 0000000000022000 INFO: task syz-executor.3:9734 blocked for more than 140 seconds. Not tainted 4.14.231-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29336 9734 8318 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x519/0x1490 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7c0/0x1760 block/ioctl.c:594 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fc790296188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c2a8 RCX: 0000000000465b09 RDX: 0000240000000000 RSI: 000000000000ab07 RDI: 0000000000000008 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c2a8 R13: 00007ffdf92244bf R14: 00007fc790296300 R15: 0000000000022000 INFO: task syz-executor.1:9713 blocked for more than 140 seconds. Not tainted 4.14.231-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27944 9713 8327 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x519/0x1490 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 nbd_start_device_ioctl drivers/block/nbd.c:1265 [inline] __nbd_ioctl drivers/block/nbd.c:1334 [inline] nbd_ioctl+0x2ba/0xad0 drivers/block/nbd.c:1374 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7c0/0x1760 block/ioctl.c:594 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fb3b9964188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fff3ecb634f R14: 00007fb3b9964300 R15: 0000000000022000 INFO: task syz-executor.1:9804 blocked for more than 140 seconds. Not tainted 4.14.231-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29344 9804 8327 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 blk_mq_freeze_queue_wait+0xfd/0x1e0 block/blk-mq.c:154 blk_freeze_queue+0x3d/0x60 block/blk-mq.c:183 blk_mq_freeze_queue+0x9/0x10 block/blk-mq.c:192 nbd_add_socket+0xfd/0x810 drivers/block/nbd.c:959 __nbd_ioctl drivers/block/nbd.c:1307 [inline] nbd_ioctl+0x485/0xad0 drivers/block/nbd.c:1374 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7c0/0x1760 block/ioctl.c:594 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fb3b9922188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09 RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007fff3ecb634f R14: 00007fb3b9922300 R15: 0000000000022000 INFO: task syz-executor.1:9805 blocked for more than 140 seconds. Not tainted 4.14.231-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29736 9805 8327 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x519/0x1490 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7c0/0x1760 block/ioctl.c:594 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fb3b9901188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c158 RCX: 0000000000465b09 RDX: 0000000000000401 RSI: 000000000000ab09 RDI: 0000000000000006 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c158 R13: 00007fff3ecb634f R14: 00007fb3b9901300 R15: 0000000000022000 INFO: task syz-executor.1:9806 blocked for more than 140 seconds. Not tainted 4.14.231-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29736 9806 8327 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x519/0x1490 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7c0/0x1760 block/ioctl.c:594 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fb3b98e0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c200 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000007 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c200 R13: 00007fff3ecb634f R14: 00007fb3b98e0300 R15: 0000000000022000 INFO: task syz-executor.1:9807 blocked for more than 140 seconds. Not tainted 4.14.231-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29736 9807 8327 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x824/0x1ee0 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x519/0x1490 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 __blkdev_driver_ioctl block/ioctl.c:297 [inline] blkdev_ioctl+0x7c0/0x1760 block/ioctl.c:594 block_ioctl+0xd7/0x130 fs/block_dev.c:1893 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x465b09 RSP: 002b:00007fb3b98bf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c2a8 RCX: 0000000000465b09 RDX: 0000240000000000 RSI: 000000000000ab07 RDI: 0000000000000008 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c2a8 R13: 00007fff3ecb634f R14: 00007fb3b98bf300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1527: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4548 1 lock held by in:imklog/7725: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0x8e/0xc0 fs/file.c:769 1 lock held by syz-executor.3/9664: #0: (&nbd->config_lock){+.+.}, at: [] nbd_start_device_ioctl drivers/block/nbd.c:1265 [inline] #0: (&nbd->config_lock){+.+.}, at: [] __nbd_ioctl drivers/block/nbd.c:1334 [inline] #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x2ba/0xad0 drivers/block/nbd.c:1374 1 lock held by syz-executor.3/9721: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.3/9722: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.3/9728: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.3/9734: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.1/9713: #0: (&nbd->config_lock){+.+.}, at: [] nbd_start_device_ioctl drivers/block/nbd.c:1265 [inline] #0: (&nbd->config_lock){+.+.}, at: [] __nbd_ioctl drivers/block/nbd.c:1334 [inline] #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x2ba/0xad0 drivers/block/nbd.c:1374 1 lock held by syz-executor.1/9804: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.1/9805: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.1/9806: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.1/9807: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.0/9727: #0: (&nbd->config_lock){+.+.}, at: [] nbd_start_device_ioctl drivers/block/nbd.c:1265 [inline] #0: (&nbd->config_lock){+.+.}, at: [] __nbd_ioctl drivers/block/nbd.c:1334 [inline] #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x2ba/0xad0 drivers/block/nbd.c:1374 1 lock held by syz-executor.0/9808: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.0/9809: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.0/9810: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.0/9811: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.5/9784: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.5/9812: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.5/9814: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.5/9817: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.4/9789: #0: (&nbd->config_lock){+.+.}, at: [] nbd_start_device_ioctl drivers/block/nbd.c:1265 [inline] #0: (&nbd->config_lock){+.+.}, at: [] __nbd_ioctl drivers/block/nbd.c:1334 [inline] #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x2ba/0xad0 drivers/block/nbd.c:1374 1 lock held by syz-executor.4/9815: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.4/9818: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.4/9820: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.2/9791: #0: (&nbd->config_lock){+.+.}, at: [] nbd_start_device_ioctl drivers/block/nbd.c:1265 [inline] #0: (&nbd->config_lock){+.+.}, at: [] __nbd_ioctl drivers/block/nbd.c:1334 [inline] #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x2ba/0xad0 drivers/block/nbd.c:1374 1 lock held by syz-executor.2/9813: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.2/9816: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 1 lock held by syz-executor.2/9819: #0: (&nbd->config_lock){+.+.}, at: [] nbd_ioctl+0x122/0xad0 drivers/block/nbd.c:1367 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1527 Comm: khungtaskd Not tainted 4.14.231-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+0x14b/0x1e7 lib/dump_stack.c:58 nmi_cpu_backtrace.cold.0+0x3c/0x78 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xf6/0x120 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x51b/0xa70 kernel/hung_task.c:274 kthread+0x338/0x400 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4608 Comm: systemd-journal Not tainted 4.14.231-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880a1984440 task.stack: ffff8880a1988000 RIP: 0010:memset_erms+0xe/0x10 arch/x86/lib/memset_64.S:68 RSP: 0018:ffff8880a198f9c0 EFLAGS: 00000246 RAX: ffffed10138f434c RBX: ffff88809c7a1a60 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000000000fc RDI: ffffed10138f434c RBP: ffff8880a198fa00 R08: 0000000000000001 R09: ffffed10138f434c R10: 0000000000000000 R11: 0000000000000000 R12: ffff88813fe604c0 R13: 0000000000000000 R14: ffff88809c7a1a00 R15: ffff88809c7a1a5f FS: 00007ffb0182c8c0(0000) GS:ffff8880ba600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffafeca5000 CR3: 00000000a1a8d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc mm/slab.c:3390 [inline] kmem_cache_alloc_trace+0x13b/0x3f0 mm/slab.c:3616 kmalloc include/linux/slab.h:488 [inline] kzalloc include/linux/slab.h:661 [inline] aa_alloc_file_ctx security/apparmor/include/file.h:60 [inline] apparmor_file_alloc_security+0x119/0x6f0 security/apparmor/lsm.c:431 security_file_alloc+0x5a/0x80 security/security.c:874 get_empty_filp+0x14f/0x3c0 fs/file_table.c:129 path_openat+0xad/0x2760 fs/namei.c:3545 do_filp_open+0x16b/0x220 fs/namei.c:3603 do_sys_open+0x1d0/0x350 fs/open.c:1081 SYSC_open fs/open.c:1099 [inline] SyS_open+0x19/0x20 fs/open.c:1094 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7ffb00dbb840 RSP: 002b:00007ffdbe3495d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffdbe3498e0 RCX: 00007ffb00dbb840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000560e6a03cc80 RBP: 000000000000000d R08: 000000000000c0c1 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000560e6a031040 R14: 00007ffdbe3498a0 R15: 0000560e6a03e540 Code: 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 f3 aa 4c 89 c8 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 01 01 48 0f