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.3:7166 blocked for more than 140 seconds.
Not tainted 4.14.113 #3
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3 D24992 7166 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_release+0x1e/0x1b0 drivers/block/loop.c:1667
__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: 0033:0x412b30
RSP: 002b:00007fff41223c48 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000412b30
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003
RBP: 00000000000000f3 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff41223c80 R14: 000000000003ee53 R15: 00007fff41223c90
INFO: task syz-executor.1:7167 blocked for more than 140 seconds.
Not tainted 4.14.113 #3
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D24992 7167 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: 0033:0x412d10
RSP: 002b:00007ffdc4eeccc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000003f0e3 RCX: 0000000000412d10
RDX: 00007ffdc4eecd5a RSI: 0000000000000002 RDI: 00007ffdc4eecd50
RBP: 00000000000000cb R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdc4eecd00 R14: 000000000003edac R15: 00007ffdc4eecd10
INFO: task syz-executor.2:7168 blocked for more than 140 seconds.
Not tainted 4.14.113 #3
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D25168 7168 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: 0033:0x458c07
RSP: 002b:00007ffd698b87e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458c07
RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003
RBP: 00000000000000bc R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd698b8820 R14: 000000000003ee3e R15: 00007ffd698b8830
INFO: task syz-executor.4:7169 blocked for more than 140 seconds.
Not tainted 4.14.113 #3
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4 D25168 7169 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: 0033:0x412d10
RSP: 002b:00007ffe76360a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000003f0d7 RCX: 0000000000412d10
RDX: 00007ffe76360ada RSI: 0000000000000002 RDI: 00007ffe76360ad0
RBP: 00000000000000ae R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe76360a80 R14: 000000000003edaa R15: 00007ffe76360a90
INFO: task blkid:9191 blocked for more than 140 seconds.
Not tainted 4.14.113 #3
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid D28496 9191 7127 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: 0033:0x7f0179ab12b0
RSP: 002b:00007ffc3aa48388 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f0179ab12b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000099c030
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005
INFO: task syz-executor.5:9198 blocked for more than 140 seconds.
Not tainted 4.14.113 #3
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5 D28288 9198 7164 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: 0033:0x458c07
RSP: 002b:00007f715d7bd9f8 EFLAGS: 00000202 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f715d7be6d4 RCX: 0000000000458c07
RDX: 00007f715d7bdab0 RSI: 0000000000004c04 RDI: 0000000000000005
RBP: 000000000073bf00 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000202 R12: 0000000000000004
R13: 0000000000000004 R14: 0000000000000005 R15: 00000000ffffffff
INFO: task syz-executor.0:9203 blocked for more than 140 seconds.
Not tainted 4.14.113 #3
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0 D29184 9203 7165 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: 0033:0x412d31
RSP: 002b:00007fa0e9597a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 0000000000412d31
RDX: 00007fa0e9597b0a RSI: 0000000000000002 RDI: 00007fa0e9597b00
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000293 R12: 0000000000000004
R13: 00000000004c78b3 R14: 00000000004dd8d8 R15: 00000000ffffffff
INFO: task blkid:9204 blocked for more than 140 seconds.
Not tainted 4.14.113 #3
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid D29040 9204 7245 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: 0033:0x7fd4ae360120
RSP: 002b:00007fff2aed6528 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd4ae360120
RDX: 00007fff2aed6f41 RSI: 0000000000000000 RDI: 00007fff2aed6f41
RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000015b1030
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005
INFO: task blkid:9205 blocked for more than 140 seconds.
Not tainted 4.14.113 #3
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid D29000 9205 7128 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: 0033:0x7fd552ef8120
RSP: 002b:00007fffb5727b78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd552ef8120
RDX: 00007fffb5728f34 RSI: 0000000000000000 RDI: 00007fffb5728f34
RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000002034030
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005
Showing all locks held in the system:
1 lock held by khungtaskd/1007:
#0: (tasklist_lock){.+.+}, at: [<ffffffff81486f98>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4544
2 locks held by getty/7117:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b0323>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310c666>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7118:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b0323>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310c666>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7119:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b0323>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310c666>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7120:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b0323>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310c666>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7121:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b0323>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310c666>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7122:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b0323>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310c666>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by getty/7123:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff861b0323>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff8310c666>] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156
2 locks held by syz-executor.3/7166:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a7936>] __blkdev_put+0xa6/0x7f0 fs/block_dev.c:1778
#1: (loop_index_mutex){+.+.}, at: [<ffffffff8373b1ee>] lo_release+0x1e/0x1b0 drivers/block/loop.c:1667
2 locks held by syz-executor.1/7167:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a81c5>] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457
#1: (loop_index_mutex){+.+.}, at: [<ffffffff8373663d>] lo_open+0x1d/0xb0 drivers/block/loop.c:1624
1 lock held by syz-executor.2/7168:
#0: (loop_ctl_mutex/1){+.+.}, at: [<ffffffff8373cec7>] lo_ioctl+0x87/0x1c70 drivers/block/loop.c:1405
2 locks held by syz-executor.4/7169:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a81c5>] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457
#1: (loop_index_mutex){+.+.}, at: [<ffffffff8373663d>] lo_open+0x1d/0xb0 drivers/block/loop.c:1624
3 locks held by blkid/9191:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a7936>] __blkdev_put+0xa6/0x7f0 fs/block_dev.c:1778
#1: (loop_index_mutex){+.+.}, at: [<ffffffff8373b1ee>] lo_release+0x1e/0x1b0 drivers/block/loop.c:1667
#2: (loop_ctl_mutex#2){+.+.}, at: [<ffffffff8373b254>] __lo_release drivers/block/loop.c:1644 [inline]
#2: (loop_ctl_mutex#2){+.+.}, at: [<ffffffff8373b254>] lo_release+0x84/0x1b0 drivers/block/loop.c:1668
2 locks held by syz-executor.5/9198:
#0: (loop_ctl_mutex/1){+.+.}, at: [<ffffffff8373cec7>] lo_ioctl+0x87/0x1c70 drivers/block/loop.c:1405
#1: (&bdev->bd_mutex){+.+.}, at: [<ffffffff82caa54f>] blkdev_reread_part+0x1f/0x40 block/ioctl.c:192
1 lock held by syz-executor.0/9203:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a81c5>] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457
2 locks held by blkid/9204:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a81c5>] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457
#1: (loop_index_mutex){+.+.}, at: [<ffffffff8373663d>] lo_open+0x1d/0xb0 drivers/block/loop.c:1624
1 lock held by blkid/9205:
#0: (&bdev->bd_mutex){+.+.}, at: [<ffffffff819a81c5>] __blkdev_get+0x145/0x1120 fs/block_dev.c:1457
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1007 Comm: khungtaskd Not tainted 4.14.113 #3
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: 7579 Comm: kworker/u4:5 Not tainted 4.14.113 #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
task: ffff88805e37e080 task.stack: ffff88805e750000
RIP: 0010:__lock_acquire+0x203/0x45e0 kernel/locking/lockdep.c:3373
RSP: 0018:ffff88805e757a10 EFLAGS: 00000046
RAX: ffffffff88d30e50 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 1ffff1100c9282f8 RSI: 0000000000000000 RDI: ffff8880649417c0
RBP: ffff88805e757bc0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffff88805e37e080 R12: ffff8880649417b8
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000138e948 CR3: 00000000a99ff000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3994
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:176
spin_lock_bh include/linux/spinlock.h:322 [inline]
batadv_nc_purge_paths+0xcb/0x350 net/batman-adv/network-coding.c:450
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: ff ff ff 48 b8 00 00 00 00 00 fc ff df 41 89 f5 4b 8d 7c ec 08 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 63 2e 00 00 4b 8b 44 ec 08 <48> 85 c0 0f 84 15 ff ff ff f0 ff 80 38 01 00 00 49 8d b3 78 08