syz-executor0(7426): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(7426): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(7426): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(7426): getblk(): executed=9 bh_count=0 bh_state=0
syz-executor0(7426): getblk(): executed=9 bh_count=0 bh_state=0
INFO: task syz-executor0:7425 blocked for more than 140 seconds.
Not tainted 4.20.0-rc7-next-20181224 #189
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0 D23624 7425 8080 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x9de/0x1ed0 kernel/sched/core.c:3472
schedule+0xef/0x370 kernel/sched/core.c:3516
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
__mutex_lock_common kernel/locking/mutex.c:1002 [inline]
__mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
blkdev_put+0x34/0x540 fs/block_dev.c:1842
blkdev_close+0x8b/0xb0 fs/block_dev.c:1891
__fput+0x3bc/0xa90 fs/file_table.c:279
____fput+0x15/0x20 fs/file_table.c:312
task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411471
Code: 89 ea 48 8b 7b 08 4c 89 e9 89 c6 41 ff d4 85 c0 89 c5 0f 85 0d ff ff ff e9 e0 fe ff ff 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 <89> 5c 24 e8 48 89 6c 24 f0 48 89 fb 4c 89 64 24 f8 48 83 ec 68 8b
RSP: 002b:00007fffc92503b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411471
RDX: 0000000000000000 RSI: 00000000007411d0 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00000000007411c8 R09: 0000000000000000
R10: 00007fffc92502d0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 00000000000007bb R15: 0000000000000000
INFO: task syz-executor0:7446 blocked for more than 140 seconds.
Not tainted 4.20.0-rc7-next-20181224 #189
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0 D24240 7446 8080 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x9de/0x1ed0 kernel/sched/core.c:3472
schedule+0xef/0x370 kernel/sched/core.c:3516
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
__mutex_lock_common kernel/locking/mutex.c:1002 [inline]
__mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
__blkdev_get+0x19b/0x13b0 fs/block_dev.c:1492
blkdev_get+0xc1/0xb50 fs/block_dev.c:1643
blkdev_open+0x1fb/0x280 fs/block_dev.c:1801
do_dentry_open+0x499/0x1250 fs/open.c:771
vfs_open+0xa0/0xd0 fs/open.c:880
do_last fs/namei.c:3418 [inline]
path_openat+0x12bc/0x5160 fs/namei.c:3534
do_filp_open+0x255/0x380 fs/namei.c:3564
do_sys_open+0x568/0x780 fs/open.c:1063
__do_sys_open fs/open.c:1081 [inline]
__se_sys_open fs/open.c:1076 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1076
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4115f1
Code: 2e 0f 1f 84 00 00 00 00 00 41 57 49 89 ff 41 56 41 55 49 89 d5 41 54 55 53 48 81 ec 28 04 00 00 8b 4f 64 64 48 8b 04 25 28 00 <00> 00 48 89 84 24 18 04 00 00 31 c0 48 89 34 24 85 c9 74 18 8b 47
RSP: 002b:00007f2e54455a80 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000020000168 RCX: 00000000004115f1
RDX: 00007f2e54455afa RSI: 0000000000000002 RDI: 00007f2e54455af0
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000293 R12: 0000000000000008
R13: 0000000000000001 R14: 00000000004dae30 R15: 00000000ffffffff
INFO: task syz-executor1:7436 blocked for more than 140 seconds.
Not tainted 4.20.0-rc7-next-20181224 #189
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1 D22288 7436 8091 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x9de/0x1ed0 kernel/sched/core.c:3472
schedule+0xef/0x370 kernel/sched/core.c:3516
__rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
rwsem_down_read_failed+0x371/0x710 kernel/locking/rwsem-xadd.c:297
call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
__down_read arch/x86/include/asm/rwsem.h:83 [inline]
down_read+0x9b/0x120 kernel/locking/rwsem.c:26
__get_super.part.11+0x207/0x2e0 fs/super.c:789
__get_super include/linux/spinlock.h:329 [inline]
get_super+0x2d/0x50 fs/super.c:818
fsync_bdev+0x17/0xc0 fs/block_dev.c:495
invalidate_partition+0x35/0x60 block/genhd.c:1579
drop_partitions.isra.14+0xe1/0x200 block/partition-generic.c:443
rescan_partitions+0x72/0x8e0 block/partition-generic.c:516
__blkdev_reread_part+0x1ad/0x230 block/ioctl.c:173
blkdev_reread_part+0x26/0x40 block/ioctl.c:193
loop_reread_partitions+0x1c/0x40 drivers/block/loop.c:633
loop_set_status+0xcd8/0x10e0 drivers/block/loop.c:1268
loop_set_status64+0xaa/0x100 drivers/block/loop.c:1388
lo_ioctl+0x904/0x22a0 drivers/block/loop.c:1514
__blkdev_driver_ioctl block/ioctl.c:303 [inline]
blkdev_ioctl+0xd84/0x21b0 block/ioctl.c:605
block_ioctl+0xee/0x130 fs/block_dev.c:1909
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:509 [inline]
do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696
ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713
__do_sys_ioctl fs/ioctl.c:720 [inline]
__se_sys_ioctl fs/ioctl.c:718 [inline]
__x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4579b9
Code: Bad RIP value.
RSP: 002b:00007f234d575c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004579b9
RDX: 0000000020000380 RSI: 0000000000004c04 RDI: 000000000000000a
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f234d5766d4
R13: 00000000004c0ed1 R14: 00000000004d27d8 R15: 00000000ffffffff
INFO: task syz-executor1:7472 blocked for more than 140 seconds.
Not tainted 4.20.0-rc7-next-20181224 #189
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1 D23272 7472 8091 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x9de/0x1ed0 kernel/sched/core.c:3472
schedule+0xef/0x370 kernel/sched/core.c:3516
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
__mutex_lock_common kernel/locking/mutex.c:1002 [inline]
__mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072
syz-executor0(7426): getblk(): executed=9 bh_count=0 bh_state=0
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
__blkdev_get+0x19b/0x13b0 fs/block_dev.c:1492
blkdev_get+0xc1/0xb50 fs/block_dev.c:1643
blkdev_open+0x1fb/0x280 fs/block_dev.c:1801
do_dentry_open+0x499/0x1250 fs/open.c:771
vfs_open+0xa0/0xd0 fs/open.c:880
do_last fs/namei.c:3418 [inline]
path_openat+0x12bc/0x5160 fs/namei.c:3534
do_filp_open+0x255/0x380 fs/namei.c:3564
do_sys_open+0x568/0x780 fs/open.c:1063
__do_sys_open fs/open.c:1081 [inline]
__se_sys_open fs/open.c:1076 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1076
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4115f1
Code: 2e 0f 1f 84 00 00 00 00 00 41 57 49 89 ff 41 56 41 55 49 89 d5 41 54 55 53 48 81 ec 28 04 00 00 8b 4f 64 64 48 8b 04 25 28 00 <00> 00 48 89 84 24 18 04 00 00 31 c0 48 89 34 24 85 c9 74 18 8b 47
RSP: 002b:00007f234d5547a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004115f1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f234d554850
RBP: 000000000073bfa0 R08: 000000000000000f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f234d5556d4
R13: 00000000004c61c1 R14: 00000000004dafe0 R15: 00000000ffffffff
INFO: task blkid:7434 blocked for more than 140 seconds.
Not tainted 4.20.0-rc7-next-20181224 #189
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid D19304 7434 3941 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x9de/0x1ed0 kernel/sched/core.c:3472
schedule+0xef/0x370 kernel/sched/core.c:3516
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
__mutex_lock_common kernel/locking/mutex.c:1002 [inline]
__mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
blkdev_put+0x34/0x540 fs/block_dev.c:1842
blkdev_close+0x8b/0xb0 fs/block_dev.c:1891
__fput+0x3bc/0xa90 fs/file_table.c:279
____fput+0x15/0x20 fs/file_table.c:312
task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fdc1b33e2b0
Code: Bad RIP value.
RSP: 002b:00007ffd6f5b07d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fdc1b33e2b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000028 R09: 0000000001680000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000f64030
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005
INFO: task syz-executor3:7444 blocked for more than 140 seconds.
Not tainted 4.20.0-rc7-next-20181224 #189
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3 D23272 7444 8119 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x9de/0x1ed0 kernel/sched/core.c:3472
schedule+0xef/0x370 kernel/sched/core.c:3516
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
__mutex_lock_common kernel/locking/mutex.c:1002 [inline]
__mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
__blkdev_get+0x19b/0x13b0 fs/block_dev.c:1492
blkdev_get+0xc1/0xb50 fs/block_dev.c:1643
blkdev_open+0x1fb/0x280 fs/block_dev.c:1801
do_dentry_open+0x499/0x1250 fs/open.c:771
vfs_open+0xa0/0xd0 fs/open.c:880
do_last fs/namei.c:3418 [inline]
path_openat+0x12bc/0x5160 fs/namei.c:3534
do_filp_open+0x255/0x380 fs/namei.c:3564
do_sys_open+0x568/0x780 fs/open.c:1063
__do_sys_open fs/open.c:1081 [inline]
__se_sys_open fs/open.c:1076 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1076
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4115f1
Code: 2e 0f 1f 84 00 00 00 00 00 41 57 49 89 ff 41 56 41 55 49 89 d5 41 54 55 53 48 81 ec 28 04 00 00 8b 4f 64 64 48 8b 04 25 28 00 <00> 00 48 89 84 24 18 04 00 00 31 c0 48 89 34 24 85 c9 74 18 8b 47
RSP: 002b:00007fd3039f27a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004115f1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fd3039f2850
RBP: 000000000073bf00 R08: 000000000000000f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fd3039f36d4
R13: 00000000004c61c1 R14: 00000000004dafe0 R15: 00000000ffffffff
INFO: task syz-executor3:7447 blocked for more than 140 seconds.
Not tainted 4.20.0-rc7-next-20181224 #189
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3 D23272 7447 8119 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x9de/0x1ed0 kernel/sched/core.c:3472
schedule+0xef/0x370 kernel/sched/core.c:3516
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
__mutex_lock_common kernel/locking/mutex.c:1002 [inline]
__mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
__blkdev_get+0x19b/0x13b0 fs/block_dev.c:1492
blkdev_get+0xc1/0xb50 fs/block_dev.c:1643
blkdev_open+0x1fb/0x280 fs/block_dev.c:1801
do_dentry_open+0x499/0x1250 fs/open.c:771
vfs_open+0xa0/0xd0 fs/open.c:880
do_last fs/namei.c:3418 [inline]
path_openat+0x12bc/0x5160 fs/namei.c:3534
do_filp_open+0x255/0x380 fs/namei.c:3564
do_sys_open+0x568/0x780 fs/open.c:1063
__do_sys_open fs/open.c:1081 [inline]
__se_sys_open fs/open.c:1076 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1076
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4115f1
Code: 2e 0f 1f 84 00 00 00 00 00 41 57 49 89 ff 41 56 41 55 49 89 d5 41 54 55 53 48 81 ec 28 04 00 00 8b 4f 64 64 48 8b 04 25 28 00 <00> 00 48 89 84 24 18 04 00 00 31 c0 48 89 34 24 85 c9 74 18 8b 47
RSP: 002b:00007fd3039d17a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004115f1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fd3039d1850
RBP: 000000000073bfa0 R08: 000000000000000f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007fd3039d26d4
R13: 00000000004c61c1 R14: 00000000004dafe0 R15: 00000000ffffffff
INFO: task syz-executor4:7440 blocked for more than 140 seconds.
Not tainted 4.20.0-rc7-next-20181224 #189
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor4 D23576 7440 8138 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x9de/0x1ed0 kernel/sched/core.c:3472
schedule+0xef/0x370 kernel/sched/core.c:3516
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
__mutex_lock_common kernel/locking/mutex.c:1002 [inline]
__mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
blkdev_put+0x34/0x540 fs/block_dev.c:1842
blkdev_close+0x8b/0xb0 fs/block_dev.c:1891
__fput+0x3bc/0xa90 fs/file_table.c:279
____fput+0x15/0x20 fs/file_table.c:312
task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:188 [inline]
exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x411471
Code: 89 ea 48 8b 7b 08 4c 89 e9 89 c6 41 ff d4 85 c0 89 c5 0f 85 0d ff ff ff e9 e0 fe ff ff 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 <89> 5c 24 e8 48 89 6c 24 f0 48 89 fb 4c 89 64 24 f8 48 83 ec 68 8b
syz-executor0(7426): getblk(): executed=9 bh_count=0 bh_state=0
RSP: 002b:00007ffc9082cbd0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000411471
RDX: 0000000000000000 RSI: 00000000007406c8 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00000000007406c0 R09: 0000000000000000
R10: 00007ffc9082caf0 R11: 0000000000000293 R12: 0000000000000000
R13: 0000000000000001 R14: 000000000000095d R15: 0000000000000004
INFO: task syz-executor4:7442 blocked for more than 140 seconds.
Not tainted 4.20.0-rc7-next-20181224 #189
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor4 D23640 7442 8138 0x00000004
Call Trace:
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x9de/0x1ed0 kernel/sched/core.c:3472
schedule+0xef/0x370 kernel/sched/core.c:3516
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574
__mutex_lock_common kernel/locking/mutex.c:1002 [inline]
__mutex_lock+0xbe7/0x1700 kernel/locking/mutex.c:1072
mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087
__blkdev_get+0x19b/0x13b0 fs/block_dev.c:1492
blkdev_get+0xc1/0xb50 fs/block_dev.c:1643
blkdev_open+0x1fb/0x280 fs/block_dev.c:1801
do_dentry_open+0x499/0x1250 fs/open.c:771
vfs_open+0xa0/0xd0 fs/open.c:880
do_last fs/namei.c:3418 [inline]
path_openat+0x12bc/0x5160 fs/namei.c:3534
do_filp_open+0x255/0x380 fs/namei.c:3564
do_sys_open+0x568/0x780 fs/open.c:1063
__do_sys_open fs/open.c:1081 [inline]
__se_sys_open fs/open.c:1076 [inline]
__x64_sys_open+0x7e/0xc0 fs/open.c:1076
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4115f1
Code: 2e 0f 1f 84 00 00 00 00 00 41 57 49 89 ff 41 56 41 55 49 89 d5 41 54 55 53 48 81 ec 28 04 00 00 8b 4f 64 64 48 8b 04 25 28 00 <00> 00 48 89 84 24 18 04 00 00 31 c0 48 89 34 24 85 c9 74 18 8b 47
RSP: 002b:00007efea1cb77a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004115f1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007efea1cb7850
RBP: 000000000073bf00 R08: 000000000000000f R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 00007efea1cb86d4
R13: 00000000004c61c1 R14: 00000000004dafe0 R15: 00000000ffffffff
Showing all locks held in the system:
1 lock held by khungtaskd/1034:
#0: 000000009ac38165 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4389
1 lock held by rsyslogd/7935:
#0: 0000000040652337 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:795
2 locks held by getty/8046:
#0: 00000000f8269b7c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000ec0a5aed (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154
2 locks held by getty/8047:
#0: 0000000002500712 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000f709f379 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154
2 locks held by getty/8048:
#0: 000000007beeb0b1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000069f979bc (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154
2 locks held by getty/8049:
#0: 000000003e9362e8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000ab0adeea (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154
2 locks held by getty/8050:
#0: 000000003c70c7d0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341
#1: 000000008e41ba1c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154
2 locks held by getty/8051:
#0: 000000009f77c03f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341
#1: 0000000080897d56 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154
2 locks held by getty/8052:
#0: 0000000024453fc6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341
#1: 00000000675bf441 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154
1 lock held by syz-executor0/7425:
#0: 00000000f178d7b0 (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x34/0x540 fs/block_dev.c:1842
1 lock held by syz-executor0/7426:
1 lock held by syz-executor0/7446:
#0: 00000000f178d7b0 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x13b0 fs/block_dev.c:1492
2 locks held by syz-executor1/7436:
#0: 00000000f178d7b0 (&bdev->bd_mutex){+.+.}, at: blkdev_reread_part+0x1e/0x40 block/ioctl.c:192
#1: 0000000041416c6e (&fc->fs_type->s_umount_key#46){++++}, at: __get_super.part.11+0x207/0x2e0 fs/super.c:789
1 lock held by syz-executor1/7472:
#0: 00000000f178d7b0 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x13b0 fs/block_dev.c:1492
1 lock held by blkid/7434:
#0: 00000000f178d7b0 (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x34/0x540 fs/block_dev.c:1842
1 lock held by syz-executor3/7444:
#0: 00000000f178d7b0 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x13b0 fs/block_dev.c:1492
1 lock held by syz-executor3/7447:
#0: 00000000f178d7b0 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x13b0 fs/block_dev.c:1492
1 lock held by syz-executor4/7440:
#0: 00000000f178d7b0 (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x34/0x540 fs/block_dev.c:1842
1 lock held by syz-executor4/7442:
#0: 00000000f178d7b0 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x13b0 fs/block_dev.c:1492
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1034 Comm: khungtaskd Not tainted 4.20.0-rc7-next-20181224 #189
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+0x1d3/0x2c6 lib/dump_stack.c:113
nmi_cpu_backtrace.cold.4+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1c2/0x22c 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+0xba1/0x11a0 kernel/hung_task.c:287
kthread+0x35a/0x440 kernel/kthread.c:246
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.417 msecs
NMI backtrace for cpu 0
CPU: 0 PID: 7426 Comm: syz-executor0 Not tainted 4.20.0-rc7-next-20181224 #189
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:match_held_lock+0x4a/0x8d0 kernel/locking/lockdep.c:3398
Code: 54 53 48 8d 9d 38 ff ff ff 48 c1 eb 03 48 81 ec c8 00 00 00 48 c7 85 38 ff ff ff b3 8a b5 41 48 c7 85 40 ff ff ff 6f b8 33 89 <48> 8d 04 13 48 c7 85 48 ff ff ff a0 33 63 81 c7 00 f1 f1 f1 f1 c7
RSP: 0018:ffff888053e16a20 EFLAGS: 00000082
RAX: 0000000000000005 RBX: 1ffff1100a7c2d49 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff8979f040 RDI: ffff88805425ceb8
RBP: ffff888053e16b10 R08: ffff88805425c600 R09: ffffed1015cc5b8f
R10: ffffed1015cc5b8f R11: ffff8880ae62dc7b R12: ffff88805425c600
R13: ffff88805425cea8 R14: ffff888053e16ae8 R15: 0000000000000001
FS: 00007f2e54498700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000000a81f8000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_is_held+0xb5/0x140 kernel/locking/lockdep.c:3661
lock_is_held_type+0x118/0x210 kernel/locking/lockdep.c:3879
lock_is_held include/linux/lockdep.h:337 [inline]
rcu_read_lock_held+0xa9/0xc0 kernel/rcu/update.c:281
xa_entry include/linux/xarray.h:902 [inline]
xas_reload include/linux/xarray.h:1250 [inline]
find_get_entry+0xc9d/0x1120 mm/filemap.c:1501
pagecache_get_page+0x12f/0xf30 mm/filemap.c:1582
find_or_create_page include/linux/pagemap.h:323 [inline]
grow_dev_page fs/buffer.c:947 [inline]
grow_buffers fs/buffer.c:1029 [inline]
__getblk_slow fs/buffer.c:1062 [inline]
__getblk_gfp+0x4ca/0x1030 fs/buffer.c:1351
__bread_gfp+0x2d/0x300 fs/buffer.c:1385
sb_bread include/linux/buffer_head.h:307 [inline]
fat__get_entry+0x5a6/0xa40 fs/fat/dir.c:101
fat_get_entry fs/fat/dir.c:129 [inline]
fat_get_short_entry+0x13c/0x2c0 fs/fat/dir.c:878
fat_subdirs+0x142/0x290 fs/fat/dir.c:944
fat_read_root fs/fat/inode.c:1416 [inline]
fat_fill_super+0x2a97/0x4240 fs/fat/inode.c:1855
vfat_fill_super+0x31/0x40 fs/fat/namei_vfat.c:1049
mount_bdev+0x30c/0x3e0 fs/super.c:1344
vfat_mount+0x34/0x40 fs/fat/namei_vfat.c:1056
legacy_get_tree+0x10c/0x220 fs/fs_context.c:641
vfs_get_tree+0x1ae/0x600 fs/super.c:1496
do_new_mount fs/namespace.c:2748 [inline]
do_mount+0x1805/0x2020 fs/namespace.c:3070
ksys_mount+0x12d/0x140 fs/namespace.c:3286
__do_sys_mount fs/namespace.c:3300 [inline]
__se_sys_mount fs/namespace.c:3297 [inline]
__x64_sys_mount+0xbe/0x150 fs/namespace.c:3297
do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a42a
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f2e54497a88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f2e54497b30 RCX: 000000000045a42a
RDX: 00007f2e54497ad0 RSI: 00000000200002c0 RDI: 00007f2e54497af0
RBP: 00000000200002c0 R08: 00007f2e54497b30 R09: 00007f2e54497ad0
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003
R13: 0000000000000000 R14: 00000000004dae30 R15: 00000000ffffffff