INFO: task syz-executor5:4482 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc3-next-20180709+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor5   D17464  4482   4474 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
 rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
 __sb_start_write+0x2d7/0x300 fs/super.c:1520
 sb_start_write include/linux/fs.h:1581 [inline]
 mnt_want_write+0x3f/0xc0 fs/namespace.c:364
 do_unlinkat+0x2b7/0xa30 fs/namei.c:4102
 __do_sys_unlink fs/namei.c:4167 [inline]
 __se_sys_unlink fs/namei.c:4165 [inline]
 __x64_sys_unlink+0x42/0x50 fs/namei.c:4165
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455b77
Code: c0 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 8d 7e 20 40 80 <ff> 10 73 64 48 83 fa 02 7e c2 0f b6 54 0b 01 8d 7a 80 40 80 ff 3f 
RSP: 002b:00007ffe661094b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77
RDX: 00007ffe661094c0 RSI: 00007ffe66109550 RDI: 00007ffe66109550
RBP: 00007ffe6610b260 R08: 0000000000000000 R09: 000000000000000d
R10: 0000000000000006 R11: 0000000000000206 R12: 0000000002722940
R13: 0000000000000000 R14: 00007ffe6610ac30 R15: 0000000000702140
INFO: task syz-executor0:7534 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc3-next-20180709+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D18040  7534   7509 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
 rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
 __sb_start_write+0x2d7/0x300 fs/super.c:1520
 sb_start_write include/linux/fs.h:1581 [inline]
 mnt_want_write+0x3f/0xc0 fs/namespace.c:364
 do_unlinkat+0x2b7/0xa30 fs/namei.c:4102
 __do_sys_unlink fs/namei.c:4167 [inline]
 __se_sys_unlink fs/namei.c:4165 [inline]
 __x64_sys_unlink+0x42/0x50 fs/namei.c:4165
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455b77
Code: c0 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 89 74 24 28 48 83 c0 02 48 89 44 24 30 48 8b 2c 24 48 83 c4 08 c3 8d 7e 20 40 80 <ff> 10 73 64 48 83 fa 02 7e c2 0f b6 54 0b 01 8d 7a 80 40 80 ff 3f 
RSP: 002b:00007fffd2f5e6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77
RDX: 00007fffd2f5e6c0 RSI: 00007fffd2f5e750 RDI: 00007fffd2f5e750
RBP: 00007fffd2f60460 R08: 0000000000000000 R09: 000000000000000d
R10: 0000000000000006 R11: 0000000000000206 R12: 0000000002120940
R13: 0000000000000000 R14: 00007fffd2f5fe30 R15: 0000000000702140
INFO: task syz-executor6:19789 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc3-next-20180709+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor6   D17464 19789      1 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
 rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
 __sb_start_write+0x2d7/0x300 fs/super.c:1520
 sb_start_write include/linux/fs.h:1581 [inline]
 mnt_want_write+0x3f/0xc0 fs/namespace.c:364
 do_rmdir+0x1a3/0x630 fs/namei.c:3982
 __do_sys_rmdir fs/namei.c:4016 [inline]
 __se_sys_rmdir fs/namei.c:4014 [inline]
 __x64_sys_rmdir+0x36/0x40 fs/namei.c:4014
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455b97
Code: 48 83 c4 08 c3 8d 7e 20 40 80 ff 10 73 64 48 83 fa 02 7e c2 0f b6 54 0b 01 8d 7a 80 40 80 ff 3f 77 b4 0f b6 4c 0b 02 8d 59 80 <80> fb 3f 77 a7 83 e6 0f c1 e6 0c 83 e2 3f c1 e2 06 09 f2 83 e1 3f 
RSP: 002b:00007ffc892edb78 EFLAGS: 00000206 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 0000000000455b97
RDX: 0000000000000000 RSI: 00007ffc892ef920 RDI: 00007ffc892ef920
RBP: 00007ffc892ef920 R08: 0000000000000000 R09: 0000000000000001
R10: 000000000000000a R11: 0000000000000206 R12: 0000000001aca940
R13: 0000000000000000 R14: 00007ffc892ef2f0 R15: 0000000000702140
INFO: task syz-executor2:31145 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc3-next-20180709+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D27600 31145   6824 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
 rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
 __sb_start_write+0x2d7/0x300 fs/super.c:1520
 sb_start_write include/linux/fs.h:1581 [inline]
 mnt_want_write+0x3f/0xc0 fs/namespace.c:364
 vfs_truncate+0x159/0x840 fs/open.c:81
 do_sys_truncate+0x156/0x190 fs/open.c:132
 __do_sys_truncate fs/open.c:144 [inline]
 __se_sys_truncate fs/open.c:142 [inline]
 __x64_sys_truncate+0x54/0x80 fs/open.c:142
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455e29
Code: cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 ab 04 00 00 48 83 ec 58 48 89 6c 24 50 48 8d 6c 24 50 48 8b 44 24 60 c6 00 00 <48> 8b 4c 24 68 48 89 ca 48 89 50 08 48 8b 59 20 48 01 da 31 db 31 
RSP: 002b:00007f14376c5c68 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f14376c66d4 RCX: 0000000000455e29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140
RBP: 000000000072bf48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bc016 R14: 00000000004d44f8 R15: 0000000000000001
INFO: task syz-executor2:31147 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc3-next-20180709+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D26256 31147   6824 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
 rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
 __sb_start_write+0x2d7/0x300 fs/super.c:1520
 sb_start_write include/linux/fs.h:1581 [inline]
 mnt_want_write+0x3f/0xc0 fs/namespace.c:364
 do_last fs/namei.c:3339 [inline]
 path_openat+0x2878/0x5620 fs/namei.c:3587
 do_filp_open+0x255/0x380 fs/namei.c:3621
 do_sys_open+0x584/0x720 fs/open.c:1106
 ksys_open include/linux/syscalls.h:1285 [inline]
 __do_sys_creat fs/open.c:1164 [inline]
 __se_sys_creat fs/open.c:1162 [inline]
 __x64_sys_creat+0x61/0x80 fs/open.c:1162
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455e29
Code: cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 ab 04 00 00 48 83 ec 58 48 89 6c 24 50 48 8d 6c 24 50 48 8b 44 24 60 c6 00 00 <48> 8b 4c 24 68 48 89 ca 48 89 50 08 48 8b 59 20 48 01 da 31 db 31 
RSP: 002b:00007f14376a4c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f14376a56d4 RCX: 0000000000455e29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000200
RBP: 000000000072bff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bbd75 R14: 00000000004c9188 R15: 0000000000000002
INFO: task syz-executor2:31148 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc3-next-20180709+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D25408 31148   6824 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
 rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
 __sb_start_write+0x2d7/0x300 fs/super.c:1520
 sb_start_write include/linux/fs.h:1581 [inline]
 mnt_want_write+0x3f/0xc0 fs/namespace.c:364
 do_last fs/namei.c:3339 [inline]
 path_openat+0x2878/0x5620 fs/namei.c:3587
 do_filp_open+0x255/0x380 fs/namei.c:3621
 do_sys_open+0x584/0x720 fs/open.c:1106
 __do_sys_open fs/open.c:1124 [inline]
 __se_sys_open fs/open.c:1119 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1119
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455e29
Code: cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 ab 04 00 00 48 83 ec 58 48 89 6c 24 50 48 8d 6c 24 50 48 8b 44 24 60 c6 00 00 <48> 8b 4c 24 68 48 89 ca 48 89 50 08 48 8b 59 20 48 01 da 31 db 31 
RSP: 002b:00007f1437683c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f14376846d4 RCX: 0000000000455e29
RDX: 0000000000000000 RSI: 0000000000004040 RDI: 0000000020000040
RBP: 000000000072c098 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004eb67f R14: 00000000004d0370 R15: 0000000000000003
INFO: task syz-executor2:31149 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc3-next-20180709+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D26968 31149   6824 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
 rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
 __sb_start_write+0x2d7/0x300 fs/super.c:1520
 sb_start_write include/linux/fs.h:1581 [inline]
 do_sys_ftruncate+0x290/0x560 fs/open.c:189
 __do_sys_ftruncate fs/open.c:204 [inline]
 __se_sys_ftruncate fs/open.c:202 [inline]
 __x64_sys_ftruncate+0x59/0x80 fs/open.c:202
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455e29
Code: cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 ab 04 00 00 48 83 ec 58 48 89 6c 24 50 48 8d 6c 24 50 48 8b 44 24 60 c6 00 00 <48> 8b 4c 24 68 48 89 ca 48 89 50 08 48 8b 59 20 48 01 da 31 db 31 
RSP: 002b:00007f1437662c68 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 00007f14376636d4 RCX: 0000000000455e29
RDX: 0000000000000000 RSI: 0000000000008200 RDI: 0000000000000013
RBP: 000000000072c140 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bc015 R14: 00000000004c96c8 R15: 0000000000000004
INFO: task syz-executor2:31152 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc3-next-20180709+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D25632 31152   6824 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
 rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
 __sb_start_write+0x2d7/0x300 fs/super.c:1520
 file_start_write include/linux/fs.h:2779 [inline]
 do_sendfile+0xac0/0xe20 fs/read_write.c:1439
 __do_sys_sendfile64 fs/read_write.c:1495 [inline]
 __se_sys_sendfile64 fs/read_write.c:1487 [inline]
 __x64_sys_sendfile64+0x15d/0x250 fs/read_write.c:1487
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455e29
Code: cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 ab 04 00 00 48 83 ec 58 48 89 6c 24 50 48 8d 6c 24 50 48 8b 44 24 60 c6 00 00 <48> 8b 4c 24 68 48 89 ca 48 89 50 08 48 8b 59 20 48 01 da 31 db 31 
RSP: 002b:00007f1437641c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f14376426d4 RCX: 0000000000455e29
RDX: 0000000020d83ff8 RSI: 0000000000000014 RDI: 0000000000000013
RBP: 000000000072c1e8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000800000000003 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c1113 R14: 00000000004d1540 R15: 0000000000000005
INFO: task syz-executor2:31153 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc3-next-20180709+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D25872 31153   6824 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
 rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
 __sb_start_write+0x2d7/0x300 fs/super.c:1520
 sb_start_write include/linux/fs.h:1581 [inline]
 mnt_want_write+0x3f/0xc0 fs/namespace.c:364
 vfs_truncate+0x159/0x840 fs/open.c:81
 do_sys_truncate+0x156/0x190 fs/open.c:132
 __do_sys_truncate fs/open.c:144 [inline]
 __se_sys_truncate fs/open.c:142 [inline]
 __x64_sys_truncate+0x54/0x80 fs/open.c:142
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455e29
Code: cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 ab 04 00 00 48 83 ec 58 48 89 6c 24 50 48 8d 6c 24 50 48 8b 44 24 60 c6 00 00 <48> 8b 4c 24 68 48 89 ca 48 89 50 08 48 8b 59 20 48 01 da 31 db 31 
RSP: 002b:00007f1437620c68 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f14376216d4 RCX: 0000000000455e29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140
RBP: 000000000072c290 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004bc016 R14: 00000000004d44f8 R15: 0000000000000006
INFO: task syz-executor7:31141 blocked for more than 140 seconds.
      Not tainted 4.18.0-rc3-next-20180709+ #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor7   D24688 31141   4479 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2853 [inline]
 __schedule+0x87c/0x1ed0 kernel/sched/core.c:3501
 schedule+0xfb/0x450 kernel/sched/core.c:3545
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline]
 rwsem_down_read_failed+0x362/0x600 kernel/locking/rwsem-xadd.c:286
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 __percpu_down_read+0x16e/0x210 kernel/locking/percpu-rwsem.c:85
 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
 __sb_start_write+0x2d7/0x300 fs/super.c:1520
 file_start_write include/linux/fs.h:2779 [inline]
 vfs_write+0x42a/0x560 fs/read_write.c:548
 ksys_write+0x101/0x260 fs/read_write.c:598
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x455e29
Code: cc 64 48 8b 0c 25 f8 ff ff ff 48 3b 61 10 0f 86 ab 04 00 00 48 83 ec 58 48 89 6c 24 50 48 8d 6c 24 50 48 8b 44 24 60 c6 00 00 <48> 8b 4c 24 68 48 89 ca 48 89 50 08 48 8b 59 20 48 01 da 31 db 31 
RSP: 002b:00007fc3514a9c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc3514aa6d4 RCX: 0000000000455e29
RDX: 0000000000000009 RSI: 00000000200002c0 RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c2eae R14: 00000000004d4ca8 R15: 0000000000000000
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 PID: 897 Comm: khungtaskd Not tainted 4.18.0-rc3-next-20180709+ #2
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.5+0x19/0xce lib/nmi_backtrace.c:103
 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:143 [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 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54