INFO: task syz-executor1:18873 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc6-next-20180725+ #18
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1   D23544 18873   4426 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2820 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3468
 schedule+0xfb/0x450 kernel/sched/core.c:3512
 __rwsem_down_write_failed_common+0x95d/0x1630 kernel/locking/rwsem-xadd.c:566
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xaa/0x130 kernel/locking/rwsem.c:72
 inode_lock include/linux/fs.h:733 [inline]
 vfs_setxattr+0x96/0x100 fs/xattr.c:218
 setxattr+0x2ea/0x450 fs/xattr.c:450
 path_setxattr+0x1e3/0x230 fs/xattr.c:469
 __do_sys_setxattr fs/xattr.c:484 [inline]
 __se_sys_setxattr fs/xattr.c:480 [inline]
 __x64_sys_setxattr+0xc4/0x150 fs/xattr.c:480
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456a09
Code: 24 00 00 00 e8 e8 4e fd ff 0f 0b e8 c1 34 00 00 e9 3c ff ff ff cc cc cc cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff <48> 3b 61 10 76 40 48 83 ec 28 48 89 6c 24 20 48 8d 6c 24 20 48 8b
RSP: 002b:00007f459191bc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f459191c6d4 RCX: 0000000000456a09
RDX: 0000000020000340 RSI: 0000000020000380 RDI: 0000000020000140
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000ffdc R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4ab0 R14: 00000000004c28a7 R15: 0000000000000000
INFO: task syz-executor1:18880 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc6-next-20180725+ #18
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1   D25408 18880   4426 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2820 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3468
 schedule+0xfb/0x450 kernel/sched/core.c:3512
 request_wait_answer+0x4c8/0x920 fs/fuse/dev.c:463
 __fuse_request_send+0x12a/0x1d0 fs/fuse/dev.c:483
 fuse_request_send+0x62/0xa0 fs/fuse/dev.c:496
 fuse_simple_request+0x33d/0x730 fs/fuse/dev.c:554
 fuse_setxattr+0x3df/0x650 fs/fuse/xattr.c:37
 fuse_xattr_set+0x3b/0x70 fs/fuse/xattr.c:192
 __vfs_setxattr+0x124/0x190 fs/xattr.c:149
 __vfs_setxattr_noperm+0x11d/0x410 fs/xattr.c:180
 vfs_setxattr+0xd8/0x100 fs/xattr.c:223
 setxattr+0x2ea/0x450 fs/xattr.c:450
 path_setxattr+0x1e3/0x230 fs/xattr.c:469
 __do_sys_setxattr fs/xattr.c:484 [inline]
 __se_sys_setxattr fs/xattr.c:480 [inline]
 __x64_sys_setxattr+0xc4/0x150 fs/xattr.c:480
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456a09
Code: 24 00 00 00 e8 e8 4e fd ff 0f 0b e8 c1 34 00 00 e9 3c ff ff ff cc cc cc cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff <48> 3b 61 10 76 40 48 83 ec 28 48 89 6c 24 20 48 8d 6c 24 20 48 8b
RSP: 002b:00007f45918fac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f45918fb6d4 RCX: 0000000000456a09
RDX: 0000000020000240 RSI: 0000000020000100 RDI: 0000000020000080
RBP: 0000000000930140 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000002b R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4ab0 R14: 00000000004c28a7 R15: 0000000000000001
INFO: task syz-executor1:18883 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc6-next-20180725+ #18
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1   D25408 18883   4426 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2820 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3468
 schedule+0xfb/0x450 kernel/sched/core.c:3512
 __rwsem_down_write_failed_common+0x95d/0x1630 kernel/locking/rwsem-xadd.c:566
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xaa/0x130 kernel/locking/rwsem.c:72
 inode_lock include/linux/fs.h:733 [inline]
 vfs_setxattr+0x96/0x100 fs/xattr.c:218
 setxattr+0x2ea/0x450 fs/xattr.c:450
 path_setxattr+0x1e3/0x230 fs/xattr.c:469
 __do_sys_setxattr fs/xattr.c:484 [inline]
 __se_sys_setxattr fs/xattr.c:480 [inline]
 __x64_sys_setxattr+0xc4/0x150 fs/xattr.c:480
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456a09
Code: 24 00 00 00 e8 e8 4e fd ff 0f 0b e8 c1 34 00 00 e9 3c ff ff ff cc cc cc cc cc cc cc cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff <48> 3b 61 10 76 40 48 83 ec 28 48 89 6c 24 20 48 8d 6c 24 20 48 8b
RSP: 002b:00007f45918d9c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f45918da6d4 RCX: 0000000000456a09
RDX: 0000000020000240 RSI: 0000000020000100 RDI: 0000000020000080
RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000002b R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d4ab0 R14: 00000000004c28a7 R15: 0000000000000002
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 774 Comm: khungtaskd Not tainted 4.18.0-rc6-next-20180725+ #18
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+0x1c9/0x2b4 lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x151/0x192 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:144 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline]
 watchdog+0xb39/0x10b0 kernel/hung_task.c:265
 kthread+0x345/0x410 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54