protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 INFO: task syz-executor.0:10959 blocked for more than 140 seconds. Not tainted 4.14.134 #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D29296 10959 7028 0x00000004 Call Trace: context_switch /kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 /kernel/sched/core.c:3383 schedule+0x92/0x1c0 /kernel/sched/core.c:3427 schedule_preempt_disabled+0x13/0x20 /kernel/sched/core.c:3485 __mutex_lock_common /kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 /kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 /kernel/locking/mutex.c:908 blkdev_reread_part+0x1f/0x40 /block/ioctl.c:192 loop_reread_partitions+0x7c/0x90 /drivers/block/loop.c:614 loop_set_status+0xc25/0x11f0 /drivers/block/loop.c:1183 loop_set_status64+0xa6/0xf0 /drivers/block/loop.c:1301 lo_ioctl+0x5c1/0x1ce0 /drivers/block/loop.c:1431 __blkdev_driver_ioctl /block/ioctl.c:297 [inline] blkdev_ioctl+0x96b/0x1860 /block/ioctl.c:594 block_ioctl+0xde/0x120 /fs/block_dev.c:1881 vfs_ioctl /fs/ioctl.c:46 [inline] file_ioctl /fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 /fs/ioctl.c:684 SYSC_ioctl /fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 /fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 /arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459697 RSP: 002b:00007efd385dd9f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007efd385de6d4 RCX: 0000000000459697 RDX: 00007efd385ddab0 RSI: 0000000000004c04 RDI: 0000000000000004 RBP: 0000000000000002 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000003 R13: 0000000000000003 R14: 0000000000000004 R15: 00000000ffffffff INFO: task syz-executor.0:10991 blocked for more than 140 seconds. Not tainted 4.14.134 #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D28592 10991 7028 0x00000004 Call Trace: context_switch /kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 /kernel/sched/core.c:3383 schedule+0x92/0x1c0 /kernel/sched/core.c:3427 schedule_preempt_disabled+0x13/0x20 /kernel/sched/core.c:3485 __mutex_lock_common /kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 /kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 /kernel/locking/mutex.c:908 __blkdev_get+0x145/0x1120 /fs/block_dev.c:1457 blkdev_get+0xa8/0x8e0 /fs/block_dev.c:1612 blkdev_open+0x1d1/0x260 /fs/block_dev.c:1770 do_dentry_open+0x73b/0xeb0 /fs/open.c:758 vfs_open+0x105/0x220 /fs/open.c:872 do_last /fs/namei.c:3425 [inline] path_openat+0x8bd/0x3f70 /fs/namei.c:3566 do_filp_open+0x18e/0x250 /fs/namei.c:3600 do_sys_open+0x2c5/0x430 /fs/open.c:1065 SYSC_open /fs/open.c:1083 [inline] SyS_open+0x2d/0x40 /fs/open.c:1078 do_syscall_64+0x1e8/0x640 /arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413711 RSP: 002b:00007efd385bc9f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007efd385bd6d4 RCX: 0000000000413711 RDX: 00007efd385bcbaa RSI: 0000000000000002 RDI: 00007efd385bcba0 RBP: 0000000000000002 R08: 0000000000000000 R09: 000000000000000a R10: 0000000000000075 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000003 R14: 00007efd385bd6d4 R15: 00000000ffffffff INFO: task syz-executor.4:10961 blocked for more than 140 seconds. Not tainted 4.14.134 #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28656 10961 7030 0x00000004 Call Trace: context_switch /kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 /kernel/sched/core.c:3383 schedule+0x92/0x1c0 /kernel/sched/core.c:3427 schedule_preempt_disabled+0x13/0x20 /kernel/sched/core.c:3485 __mutex_lock_common /kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 /kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 /kernel/locking/mutex.c:908 loop_control_ioctl+0x153/0x2f0 /drivers/block/loop.c:1996 vfs_ioctl /fs/ioctl.c:46 [inline] file_ioctl /fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 /fs/ioctl.c:684 SYSC_ioctl /fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 /fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 /arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459829 RSP: 002b:00007f74c6631c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459829 RDX: 0000000000000000 RSI: 0000000000004c81 RDI: 0000000000000009 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f74c66326d4 R13: 00000000004c2f5a R14: 00000000004d6400 R15: 00000000ffffffff INFO: task syz-executor.5:10964 blocked for more than 140 seconds. Not tainted 4.14.134 #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28392 10964 7027 0x00000004 Call Trace: context_switch /kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 /kernel/sched/core.c:3383 schedule+0x92/0x1c0 /kernel/sched/core.c:3427 schedule_preempt_disabled+0x13/0x20 /kernel/sched/core.c:3485 __mutex_lock_common /kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 /kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 /kernel/locking/mutex.c:908 lo_open+0x1d/0xb0 /drivers/block/loop.c:1623 __blkdev_get+0xaad/0x1120 /fs/block_dev.c:1537 blkdev_get+0x43f/0x8e0 /fs/block_dev.c:1612 blkdev_open+0x1d1/0x260 /fs/block_dev.c:1770 do_dentry_open+0x73b/0xeb0 /fs/open.c:758 vfs_open+0x105/0x220 /fs/open.c:872 do_last /fs/namei.c:3425 [inline] path_openat+0x8bd/0x3f70 /fs/namei.c:3566 do_filp_open+0x18e/0x250 /fs/namei.c:3600 do_sys_open+0x2c5/0x430 /fs/open.c:1065 SYSC_open /fs/open.c:1083 [inline] SyS_open+0x2d/0x40 /fs/open.c:1078 do_syscall_64+0x1e8/0x640 /arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413711 RSP: 002b:00007f1b7b0537a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000413711 RDX: 0000000000000000 RSI: 0000000000100082 RDI: 00007f1b7b053850 RBP: 000000000075bf20 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000293 R12: 00007f1b7b0546d4 R13: 00000000004c8aba R14: 00000000004df790 R15: 00000000ffffffff INFO: task blkid:10963 blocked for more than 140 seconds. Not tainted 4.14.134 #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. blkid D28896 10963 7200 0x00000004 Call Trace: context_switch /kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 /kernel/sched/core.c:3383 schedule+0x92/0x1c0 /kernel/sched/core.c:3427 schedule_preempt_disabled+0x13/0x20 /kernel/sched/core.c:3485 __mutex_lock_common /kernel/locking/mutex.c:833 [inline] __mutex_lock+0x73c/0x1470 /kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 /kernel/locking/mutex.c:908 __blkdev_get+0x145/0x1120 /fs/block_dev.c:1457 blkdev_get+0xa8/0x8e0 /fs/block_dev.c:1612 blkdev_open+0x1d1/0x260 /fs/block_dev.c:1770 do_dentry_open+0x73b/0xeb0 /fs/open.c:758 vfs_open+0x105/0x220 /fs/open.c:872 do_last /fs/namei.c:3425 [inline] path_openat+0x8bd/0x3f70 /fs/namei.c:3566 do_filp_open+0x18e/0x250 /fs/namei.c:3600 do_sys_open+0x2c5/0x430 /fs/open.c:1065 SYSC_open /fs/open.c:1083 [inline] SyS_open+0x2d/0x40 /fs/open.c:1078 do_syscall_64+0x1e8/0x640 /arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7fbd14010120 RSP: 002b:00007ffe642542c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbd14010120 RDX: 00007ffe64255f41 RSI: 0000000000000000 RDI: 00007ffe64255f41 RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000012b4030 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 Showing all locks held in the system: 1 lock held by khungtaskd/1005: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f /kernel/locking/lockdep.c:4541 2 locks held by getty/6982: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 /drivers/tty/n_tty.c:2156 2 locks held by getty/6983: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 /drivers/tty/n_tty.c:2156 2 locks held by getty/6984: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 /drivers/tty/n_tty.c:2156 2 locks held by getty/6985: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 /drivers/tty/n_tty.c:2156 2 locks held by getty/6986: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 /drivers/tty/n_tty.c:2156 2 locks held by getty/6987: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 /drivers/tty/n_tty.c:2156 2 locks held by getty/6988: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 /drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 /drivers/tty/n_tty.c:2156 2 locks held by syz-executor.0/10959: #0: (&lo->lo_ctl_mutex/1){+.+.}, at: [] lo_ioctl+0x8f/0x1ce0 /drivers/block/loop.c:1404 #1: (&bdev->bd_mutex){+.+.}, at: [] blkdev_reread_part+0x1f/0x40 /block/ioctl.c:192 1 lock held by syz-executor.0/10991: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x145/0x1120 /fs/block_dev.c:1457 2 locks held by syz-executor.4/10961: #0: (loop_index_mutex){+.+.}, at: [] loop_control_ioctl+0x65/0x2f0 /drivers/block/loop.c:1982 #1: (&lo->lo_ctl_mutex#2){+.+.}, at: [] loop_control_ioctl+0x153/0x2f0 /drivers/block/loop.c:1996 2 locks held by syz-executor.5/10964: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x145/0x1120 /fs/block_dev.c:1457 #1: (loop_index_mutex){+.+.}, at: [] lo_open+0x1d/0xb0 /drivers/block/loop.c:1623 1 lock held by blkid/10963: #0: (&bdev->bd_mutex){+.+.}, at: [] __blkdev_get+0x145/0x1120 /fs/block_dev.c:1457 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1005 Comm: khungtaskd Not tainted 4.14.134 #29 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+0x138/0x19c /lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x57/0x94 /lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x141/0x189 /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+0x5e7/0xb90 /kernel/hung_task.c:274 kthread+0x319/0x430 /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 skipped: idling at pc 0xffffffff861aa14e