Bluetooth: hci2: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci0: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout INFO: task syz-executor.3:9965 blocked for more than 140 seconds. Not tainted 4.19.196-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29000 9965 8458 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x4ba/0x1190 kernel/locking/mutex.c:1083 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1098 nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x7ea/0x1790 block/ioctl.c:601 block_ioctl+0xd7/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 Code: Bad RIP value. RSP: 002b:00007f764219b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09 RDX: 0000000000000401 RSI: 000000000000ab09 RDI: 0000000000000006 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007fffa397252f R14: 00007f764219b300 R15: 0000000000022000 INFO: task syz-executor.3:10001 blocked for more than 140 seconds. Not tainted 4.19.196-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29416 10001 8458 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 blk_mq_freeze_queue_wait+0x105/0x220 block/blk-mq.c:152 blk_freeze_queue+0x3d/0x60 block/blk-mq.c:181 blk_mq_freeze_queue+0x9/0x10 block/blk-mq.c:190 nbd_add_socket+0x109/0x840 drivers/block/nbd.c:973 __nbd_ioctl drivers/block/nbd.c:1320 [inline] nbd_ioctl+0x4fd/0xb30 drivers/block/nbd.c:1387 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x7ea/0x1790 block/ioctl.c:601 block_ioctl+0xd7/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 Code: Bad RIP value. RSP: 002b:00007f764217a188 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: 00007fffa397252f R14: 00007f764217a300 R15: 0000000000022000 INFO: task syz-executor.3:10006 blocked for more than 140 seconds. Not tainted 4.19.196-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D29400 10006 8458 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x4ba/0x1190 kernel/locking/mutex.c:1083 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1098 nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x7ea/0x1790 block/ioctl.c:601 block_ioctl+0xd7/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 Code: Bad RIP value. RSP: 002b:00007f7642138188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c200 RCX: 0000000000465b09 RDX: 0000240000000000 RSI: 000000000000ab07 RDI: 0000000000000008 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c200 R13: 00007fffa397252f R14: 00007f7642138300 R15: 0000000000022000 INFO: task syz-executor.1:9969 blocked for more than 140 seconds. Not tainted 4.19.196-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D27864 9969 8461 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x4ba/0x1190 kernel/locking/mutex.c:1083 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1098 nbd_start_device_ioctl drivers/block/nbd.c:1278 [inline] __nbd_ioctl drivers/block/nbd.c:1347 [inline] nbd_ioctl+0x2d6/0xb30 drivers/block/nbd.c:1387 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x7ea/0x1790 block/ioctl.c:601 block_ioctl+0xd7/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 Code: Bad RIP value. RSP: 002b:00007f3cb46d0188 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: 00007ffcea45e9af R14: 00007f3cb46d0300 R15: 0000000000022000 INFO: task syz-executor.1:10004 blocked for more than 140 seconds. Not tainted 4.19.196-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29416 10004 8461 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 blk_mq_freeze_queue_wait+0x105/0x220 block/blk-mq.c:152 blk_freeze_queue+0x3d/0x60 block/blk-mq.c:181 blk_mq_freeze_queue+0x9/0x10 block/blk-mq.c:190 nbd_add_socket+0x109/0x840 drivers/block/nbd.c:973 __nbd_ioctl drivers/block/nbd.c:1320 [inline] nbd_ioctl+0x4fd/0xb30 drivers/block/nbd.c:1387 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x7ea/0x1790 block/ioctl.c:601 block_ioctl+0xd7/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 Code: Bad RIP value. RSP: 002b:00007f3cb468e188 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: 00007ffcea45e9af R14: 00007f3cb468e300 R15: 0000000000022000 INFO: task syz-executor.1:10012 blocked for more than 140 seconds. Not tainted 4.19.196-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29496 10012 8461 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x4ba/0x1190 kernel/locking/mutex.c:1083 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1098 nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x7ea/0x1790 block/ioctl.c:601 block_ioctl+0xd7/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 Code: 00 e9 30 ff ff ff 83 f9 77 75 26 48 83 b8 d8 00 00 00 00 7c e2 83 f9 72 75 10 80 78 19 00 74 0a b9 03 00 00 00 e9 0c ff ff ff <31> c9 e9 05 ff ff ff 83 f9 72 eb e2 e8 c6 35 00 00 e9 c1 fe ff ff RSP: 002b:00007f3cb466d188 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: 00007ffcea45e9af R14: 00007f3cb466d300 R15: 0000000000022000 INFO: task syz-executor.1:10015 blocked for more than 140 seconds. Not tainted 4.19.196-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29400 10015 8461 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x4ba/0x1190 kernel/locking/mutex.c:1083 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1098 nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x7ea/0x1790 block/ioctl.c:601 block_ioctl+0xd7/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 Code: 00 e9 30 ff ff ff 83 f9 77 75 26 48 83 b8 d8 00 00 00 00 7c e2 83 f9 72 75 10 80 78 19 00 74 0a b9 03 00 00 00 e9 0c ff ff ff <31> c9 e9 05 ff ff ff 83 f9 72 eb e2 e8 c6 35 00 00 e9 c1 fe ff ff RSP: 002b:00007f3cb464c188 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: 00007ffcea45e9af R14: 00007f3cb464c300 R15: 0000000000022000 INFO: task syz-executor.1:10017 blocked for more than 140 seconds. Not tainted 4.19.196-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29496 10017 8461 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x4ba/0x1190 kernel/locking/mutex.c:1083 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1098 nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x7ea/0x1790 block/ioctl.c:601 block_ioctl+0xd7/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 Code: 00 e9 30 ff ff ff 83 f9 77 75 26 48 83 b8 d8 00 00 00 00 7c e2 83 f9 72 75 10 80 78 19 00 74 0a b9 03 00 00 00 e9 0c ff ff ff <31> c9 e9 05 ff ff ff 83 f9 72 eb e2 e8 c6 35 00 00 e9 c1 fe ff ff RSP: 002b:00007f3cb462b188 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: 00007ffcea45e9af R14: 00007f3cb462b300 R15: 0000000000022000 INFO: task syz-executor.5:9985 blocked for more than 140 seconds. Not tainted 4.19.196-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D29304 9985 8466 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 blk_mq_freeze_queue_wait+0x105/0x220 block/blk-mq.c:152 blk_freeze_queue+0x3d/0x60 block/blk-mq.c:181 blk_mq_freeze_queue+0x9/0x10 block/blk-mq.c:190 nbd_add_socket+0x109/0x840 drivers/block/nbd.c:973 __nbd_ioctl drivers/block/nbd.c:1320 [inline] nbd_ioctl+0x4fd/0xb30 drivers/block/nbd.c:1387 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x7ea/0x1790 block/ioctl.c:601 block_ioctl+0xd7/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 Code: 00 e9 30 ff ff ff 83 f9 77 75 26 48 83 b8 d8 00 00 00 00 7c e2 83 f9 72 75 10 80 78 19 00 74 0a b9 03 00 00 00 e9 0c ff ff ff <31> c9 e9 05 ff ff ff 83 f9 72 eb e2 e8 c6 35 00 00 e9 c1 fe ff ff RSP: 002b:00007f1106316188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffe77955e8f R14: 00007f1106316300 R15: 0000000000022000 INFO: task syz-executor.5:9988 blocked for more than 140 seconds. Not tainted 4.19.196-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D29304 9988 8466 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x80c/0x1f70 kernel/sched/core.c:3517 schedule+0x7f/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1015 [inline] __mutex_lock+0x4ba/0x1190 kernel/locking/mutex.c:1083 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1098 nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x7ea/0x1790 block/ioctl.c:601 block_ioctl+0xd7/0x130 fs/block_dev.c:1906 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465b09 Code: 00 e9 30 ff ff ff 83 f9 77 75 26 48 83 b8 d8 00 00 00 00 7c e2 83 f9 72 75 10 80 78 19 00 74 0a b9 03 00 00 00 e9 0c ff ff ff <31> c9 e9 05 ff ff ff 83 f9 72 eb e2 e8 c6 35 00 00 e9 c1 fe ff ff RSP: 002b:00007f11062f5188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09 RDX: 0000000000000401 RSI: 000000000000ab09 RDI: 0000000000000006 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffe77955e8f R14: 00007f11062f5300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1570: #0: 00000000f615388d (rcu_read_lock){....}, at: debug_show_all_locks+0x5b/0x27a kernel/locking/lockdep.c:4443 1 lock held by in:imklog/7806: 1 lock held by syz-executor.3/9965: #0: 00000000f0b1243b (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.3/10001: #0: 00000000f0b1243b (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.3/10006: #0: 00000000f0b1243b (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.1/9969: #0: 0000000068e98828 (&nbd->config_lock){+.+.}, at: nbd_start_device_ioctl drivers/block/nbd.c:1278 [inline] #0: 0000000068e98828 (&nbd->config_lock){+.+.}, at: __nbd_ioctl drivers/block/nbd.c:1347 [inline] #0: 0000000068e98828 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x2d6/0xb30 drivers/block/nbd.c:1387 1 lock held by syz-executor.1/10004: #0: 0000000068e98828 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.1/10012: #0: 0000000068e98828 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.1/10015: #0: 0000000068e98828 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.1/10017: #0: 0000000068e98828 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.5/9985: #0: 00000000c20430e1 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.5/9988: #0: 00000000c20430e1 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.5/9989: #0: 00000000c20430e1 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.5/9994: #0: 00000000c20430e1 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.5/10020: #0: 00000000c20430e1 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.5/10021: #0: 00000000c20430e1 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.0/9991: #0: 00000000d3033b75 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.0/9993: #0: 00000000d3033b75 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.0/9995: #0: 00000000d3033b75 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.0/9996: #0: 00000000d3033b75 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.0/10025: #0: 00000000d3033b75 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.0/10026: #0: 00000000d3033b75 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.0/10027: #0: 00000000d3033b75 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.0/10028: #0: 00000000d3033b75 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.2/10002: #0: 00000000cd19a3f3 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.2/10003: #0: 00000000cd19a3f3 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.2/10008: #0: 00000000cd19a3f3 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.2/10013: #0: 00000000cd19a3f3 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.2/10030: #0: 00000000cd19a3f3 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.2/10031: #0: 00000000cd19a3f3 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.2/10032: #0: 00000000cd19a3f3 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.2/10035: #0: 00000000cd19a3f3 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.4/10010: #0: 00000000d2899946 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.4/10014: #0: 00000000d2899946 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.4/10016: #0: 00000000d2899946 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.4/10018: #0: 00000000d2899946 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.4/10034: #0: 00000000d2899946 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 1 lock held by syz-executor.4/10037: #0: 00000000d2899946 (&nbd->config_lock){+.+.}, at: nbd_ioctl+0x12a/0xb30 drivers/block/nbd.c:1380 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1570 Comm: khungtaskd Not tainted 4.19.196-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x17c/0x226 lib/dump_stack.c:118 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x5c3/0xb40 kernel/hung_task.c:287 kthread+0x347/0x410 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x12/0x20 arch/x86/include/asm/irqflags.h:60