INFO: task syz-executor.5:6838 blocked for more than 140 seconds.
Not tainted 4.14.114 #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D24992 6838 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7be/0x1cf0 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_ioctl+0x87/0x1c70 drivers/block/loop.c:1405
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x983/0x1880 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+0x7b9/0x1070 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458c17
RSP: 002b:00007ffdb831e688 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c17
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003
RBP: 0000000000000042 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdb831e6c0 R14: 0000000000032529 R15: 00007ffdb831e6d0
INFO: task syz-executor.0:6837 blocked for more than 140 seconds.
Not tainted 4.14.114 #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D24848 6837 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7be/0x1cf0 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:1624
__blkdev_get+0x2c9/0x1120 fs/block_dev.c:1472
blkdev_get+0xa8/0x8e0 fs/block_dev.c:1612
blkdev_open+0x1d1/0x260 fs/block_dev.c:1770
do_dentry_open+0x73e/0xeb0 fs/open.c:758
vfs_open+0x105/0x230 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+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x412d20
RSP: 002b:00007ffc2aac5018 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000032860 RCX: 0000000000412d20
RDX: 00007ffc2aac50aa RSI: 0000000000000002 RDI: 00007ffc2aac50a0
RBP: 000000000000004c R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc2aac5050 R14: 000000000003252d R15: 00007ffc2aac5060
INFO: task syz-executor.3:6839 blocked for more than 140 seconds.
Not tainted 4.14.114 #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D24992 6839 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7be/0x1cf0 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:1624
__blkdev_get+0x2c9/0x1120 fs/block_dev.c:1472
blkdev_get+0xa8/0x8e0 fs/block_dev.c:1612
blkdev_open+0x1d1/0x260 fs/block_dev.c:1770
do_dentry_open+0x73e/0xeb0 fs/open.c:758
vfs_open+0x105/0x230 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+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x412d20
RSP: 002b:00007ffe15169438 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000003285f RCX: 0000000000412d20
RDX: 00007ffe151694ca RSI: 0000000000000002 RDI: 00007ffe151694c0
RBP: 000000000000004a R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe15169470 R14: 000000000003252b R15: 00007ffe15169480
INFO: task syz-executor.1:6840 blocked for more than 140 seconds.
Not tainted 4.14.114 #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D24992 6840 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7be/0x1cf0 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_ioctl+0x87/0x1c70 drivers/block/loop.c:1405
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x983/0x1880 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+0x7b9/0x1070 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458c17
RSP: 002b:00007ffc4d9599e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c17
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003
RBP: 0000000000000056 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc4d959a20 R14: 000000000003252b R15: 00007ffc4d959a30
INFO: task syz-executor.4:6842 blocked for more than 140 seconds.
Not tainted 4.14.114 #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D25168 6842 1 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7be/0x1cf0 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+0x73e/0xeb0 fs/open.c:758
vfs_open+0x105/0x230 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+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x412d20
RSP: 002b:00007fff9f90d908 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000032571 RCX: 0000000000412d20
RDX: 00007fff9f90d99a RSI: 0000000000000002 RDI: 00007fff9f90d990
RBP: 000000000000003b R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff9f90d940 R14: 000000000003255d R15: 00007fff9f90d950
INFO: task blkid:7487 blocked for more than 140 seconds.
Not tainted 4.14.114 #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid D28512 7487 6801 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7be/0x1cf0 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_release drivers/block/loop.c:1644 [inline]
lo_release+0x84/0x1b0 drivers/block/loop.c:1668
__blkdev_put+0x436/0x7f0 fs/block_dev.c:1791
blkdev_put+0x88/0x510 fs/block_dev.c:1856
blkdev_close+0x8b/0xb0 fs/block_dev.c:1863
__fput+0x277/0x7a0 fs/file_table.c:210
____fput+0x16/0x20 fs/file_table.c:244
task_work_run+0x119/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:267 [inline]
do_syscall_64+0x4a9/0x630 arch/x86/entry/common.c:294
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7fcf9b13a2b0
RSP: 002b:00007ffe010a2948 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fcf9b13a2b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000002101030
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005
INFO: task syz-executor.2:7491 blocked for more than 140 seconds.
Not tainted 4.14.114 #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D28704 7491 6841 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7be/0x1cf0 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:615
loop_set_status+0xc28/0x1200 drivers/block/loop.c:1184
loop_set_status64+0xa6/0xf0 drivers/block/loop.c:1302
lo_ioctl+0x5c1/0x1c70 drivers/block/loop.c:1432
__blkdev_driver_ioctl block/ioctl.c:297 [inline]
blkdev_ioctl+0x983/0x1880 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+0x7b9/0x1070 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
do_syscall_64+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x458c17
RSP: 002b:00007f5a719e09f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f5a719e16d4 RCX: 0000000000458c17
RDX: 00007f5a719e0ab0 RSI: 0000000000004c04 RDI: 0000000000000004
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000003
R13: 0000000000000003 R14: 0000000000000004 R15: 00000000ffffffff
INFO: task syz-executor.2:7499 blocked for more than 140 seconds.
Not tainted 4.14.114 #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D29184 7499 6841 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7be/0x1cf0 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+0x73e/0xeb0 fs/open.c:758
vfs_open+0x105/0x230 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+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x412d41
RSP: 002b:00007f5a719bf9f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f5a719c06d4 RCX: 0000000000412d41
RDX: 00007f5a719bfbaa RSI: 0000000000000002 RDI: 00007f5a719bfba0
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000003 R14: 00007f5a719c06d4 R15: 00000000ffffffff
INFO: task blkid:7493 blocked for more than 140 seconds.
Not tainted 4.14.114 #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid D29040 7493 6477 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2807 [inline]
__schedule+0x7be/0x1cf0 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:1624
__blkdev_get+0xab1/0x1120 fs/block_dev.c:1537
blkdev_get+0xa8/0x8e0 fs/block_dev.c:1612
blkdev_open+0x1d1/0x260 fs/block_dev.c:1770
do_dentry_open+0x73e/0xeb0 fs/open.c:758
vfs_open+0x105/0x230 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+0x1eb/0x630 arch/x86/entry/common.c:289
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f2d6c56f120
RSP: 002b:00007fff3e409058 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2d6c56f120
RDX: 00007fff3e409f41 RSI: 0000000000000000 RDI: 00007fff3e409f41
RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001838030
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005
Showing all locks held in the system:
1 lock held by khungtaskd/1008:
#0: (tasklist_lock){.+.+}, at: [<ffffffff81487148>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4541
1 lock held by rsyslogd/6671:
#0: (&f->f_pos_lock){+.+.}, at: [<ffffffff81942e9b>] __fdget_pos+0xab/0xd0 fs/file.c:769
2 locks held by getty/6794:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861af743>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310d3c6>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6795:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861af743>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310d3c6>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6796:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861af743>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310d3c6>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6797:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861af743>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310d3c6>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6798:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861af743>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310d3c6>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6799:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861af743>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310d3c6>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/6800:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861af743>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310d3c6>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.5/6838:
#0: (loop_ctl_mutex/1){+.+.}, at: [<ffffffff8373dc27>] lo_ioctl+0x87/0x1c70 drivers/block/loop.c:1405
2 locks held by syz-executor.0/6837:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a83a5>] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457
#1: (loop_index_mutex){+.+.}, at: [<ffffffff8373739d>] lo_open+0x1d/0xb0 drivers/block/loop.c:1624
2 locks held by syz-executor.3/6839:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a83a5>] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457
#1: (loop_index_mutex){+.+.}, at: [<ffffffff8373739d>] lo_open+0x1d/0xb0 drivers/block/loop.c:1624
1 lock held by syz-executor.1/6840:
#0: (loop_ctl_mutex/1){+.+.}, at: [<ffffffff8373dc27>] lo_ioctl+0x87/0x1c70 drivers/block/loop.c:1405
1 lock held by syz-executor.4/6842:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a83a5>] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457
3 locks held by blkid/7487:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a7b16>] __blkdev_put+0xa6/0x7f0 fs/block_dev.c:1778
#1: (loop_index_mutex){+.+.}, at: [<ffffffff8373bf4e>] lo_release+0x1e/0x1b0 drivers/block/loop.c:1667
#2: (loop_ctl_mutex#2){+.+.}, at: [<ffffffff8373bfb4>] __lo_release drivers/block/loop.c:1644 [inline]
#2: (loop_ctl_mutex#2){+.+.}, at: [<ffffffff8373bfb4>] lo_release+0x84/0x1b0 drivers/block/loop.c:1668
2 locks held by syz-executor.2/7491:
#0: (loop_ctl_mutex/1){+.+.}, at: [<ffffffff8373dc27>] lo_ioctl+0x87/0x1c70 drivers/block/loop.c:1405
#1: (&bdev->bd_mutex){+.+.}, at: [<ffffffff82cab2af>] blkdev_reread_part+0x1f/0x40 block/ioctl.c:192
1 lock held by syz-executor.2/7499:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a83a5>] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457
2 locks held by blkid/7493:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a83a5>] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457
#1: (loop_index_mutex){+.+.}, at: [<ffffffff8373739d>] lo_open+0x1d/0xb0 drivers/block/loop.c:1624
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1008 Comm: khungtaskd Not tainted 4.14.114 #4
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+0x31c/0x430 kernel/kthread.c:232
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 94 Comm: kworker/u4:2 Not tainted 4.14.114 #4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
task: ffff8880a9994140 task.stack: ffff8880a99a0000
RIP: 0010:__lock_release kernel/locking/lockdep.c:3797 [inline]
RIP: 0010:lock_release+0x55f/0x940 kernel/locking/lockdep.c:4010
RSP: 0018:ffff8880a99a7ba8 EFLAGS: 00000802
RAX: 0000000000000000 RBX: 1ffff11015334f7b RCX: 1ffff11015332936
RDX: 1ffff11015332937 RSI: 0000000000000003 RDI: ffff8880a9994140
RBP: ffff8880a99a7c40 R08: ffff8880a9994140 R09: 0000000000000003
R10: 0000000000000000 R11: ffff8880a9994140 R12: dca72f88dd043cf1
R13: ffffffff86034dc5 R14: 0000000000000003 R15: ffff8880a99a7c18
FS: 0000000000000000(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9bb95bd000 CR3: 00000000a942a000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:174 [inline]
_raw_spin_unlock_bh+0x1b/0x40 kernel/locking/spinlock.c:208
spin_unlock_bh include/linux/spinlock.h:362 [inline]
batadv_nc_purge_paths+0x245/0x350 net/batman-adv/network-coding.c:479
batadv_nc_worker+0x270/0x6d0 net/batman-adv/network-coding.c:729
process_one_work+0x868/0x1610 kernel/workqueue.c:2114
worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
kthread+0x31c/0x430 kernel/kthread.c:232
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402
Code: 0d d7 a6 b9 7e 0f 85 0d fc ff ff e8 80 fb b7 ff e9 03 fc ff ff 48 b8 00 00 00 00 00 fc ff df 48 8b 55 90 48 c1 ea 03 0f b6 04 02 <84> c0 74 08 3c 03 0f 8e 84 03 00 00 41 83 e9 01 45 39 88 78 08