INFO: task khugepaged:907 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. khugepaged D23240 907 2 0x80000000 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_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 collapse_huge_page+0x2b9/0x2140 mm/khugepaged.c:1006 khugepaged_scan_pmd mm/khugepaged.c:1215 [inline] khugepaged_scan_mm_slot+0x2096/0x3200 mm/khugepaged.c:1701 khugepaged_do_scan mm/khugepaged.c:1782 [inline] khugepaged+0x9aa/0xce0 mm/khugepaged.c:1827 kthread+0x345/0x410 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 INFO: task syz-fuzzer:4519 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-fuzzer D18064 4519 4515 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:1512 sb_start_pagefault include/linux/fs.h:1614 [inline] ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6127 do_page_mkwrite+0x14e/0x520 mm/memory.c:2386 wp_page_shared mm/memory.c:2682 [inline] do_wp_page+0xf78/0x19b0 mm/memory.c:2782 handle_pte_fault mm/memory.c:3995 [inline] __handle_mm_fault+0x2aab/0x4480 mm/memory.c:4103 handle_mm_fault+0x53e/0xc80 mm/memory.c:4140 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1397 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1472 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0033:0x70b5e1 Code: Bad RIP value. RSP: 002b:000000c42a8aae80 EFLAGS: 00010212 RAX: 000000c42a8ab1c0 RBX: 000000c42a8ab1c8 RCX: 00007f687d9e8000 RDX: 0000000000000754 RSI: 0000000000000000 RDI: 0000000000001430 RBP: 000000c42a8aae90 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000095bb32 R11: 0000000000000004 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000013 R15: 000000c42a8ab330 INFO: task syz-fuzzer:4530 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-fuzzer D19984 4530 4515 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:1512 sb_start_pagefault include/linux/fs.h:1614 [inline] ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6127 do_page_mkwrite+0x14e/0x520 mm/memory.c:2386 wp_page_shared mm/memory.c:2682 [inline] do_wp_page+0xf78/0x19b0 mm/memory.c:2782 handle_pte_fault mm/memory.c:3995 [inline] __handle_mm_fault+0x2aab/0x4480 mm/memory.c:4103 handle_mm_fault+0x53e/0xc80 mm/memory.c:4140 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1397 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1472 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0033:0x70b5e1 Code: Bad RIP value. RSP: 002b:000000c42b73f538 EFLAGS: 00010212 RAX: 000000c42b73f878 RBX: 000000c42b73f880 RCX: 00007f687ebe8000 RDX: 000000000000074a RSI: 0000000000000000 RDI: 00000000000007f8 RBP: 000000c42b73f548 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000095bb32 R11: 0000000000000004 R12: 0000000000000000 R13: 0000000000000020 R14: 0000000000000013 R15: 000000c42b73f9e8 INFO: task syz-executor2:4543 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D21352 4543 4537 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:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: Bad RIP value. RSP: 002b:00007ffc88980808 EFLAGS: 00000202 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffc88980810 RSI: 00007ffc889808a0 RDI: 00007ffc889808a0 RBP: 00007ffc889825b0 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000202 R12: 0000000001934940 R13: 0000000000000000 R14: 00007ffc88981f80 R15: 0000000000702140 INFO: task syz-executor7:4544 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor7 D21352 4544 4535 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:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: Bad RIP value. RSP: 002b:00007ffeffee2998 EFLAGS: 00000202 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffeffee29a0 RSI: 00007ffeffee2a30 RDI: 00007ffeffee2a30 RBP: 00007ffeffee4740 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000202 R12: 0000000002108940 R13: 0000000000000000 R14: 00007ffeffee4110 R15: 0000000000702140 INFO: task syz-executor1:4545 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D19736 4545 4536 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:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 filename_create+0x13e/0x5b0 fs/namei.c:3671 user_path_create fs/namei.c:3734 [inline] do_mkdirat+0xda/0x310 fs/namei.c:3873 __do_sys_mkdir fs/namei.c:3897 [inline] __se_sys_mkdir fs/namei.c:3895 [inline] __x64_sys_mkdir+0x5c/0x80 fs/namei.c:3895 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455267 Code: Bad RIP value. RSP: 002b:00007ffe268abb18 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe268abb40 RCX: 0000000000455267 RDX: 00007ffe268ac7f5 RSI: 00000000000001ff RDI: 00007ffe268ac7f0 RBP: 0000000000000013 R08: 0000000000000000 R09: 0000000000000005 R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000001380 R14: 00007ffe268ac1c0 R15: 00000000007034c0 INFO: task syz-executor4:4547 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D21352 4547 4538 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:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: Bad RIP value. RSP: 002b:00007ffd8c448a48 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffd8c448a50 RSI: 00007ffd8c448ae0 RDI: 00007ffd8c448ae0 RBP: 00007ffd8c44a7f0 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001d61940 R13: 0000000000000000 R14: 00007ffd8c44a1c0 R15: 0000000000702140 INFO: task syz-executor3:4548 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D22096 4548 4540 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:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: Bad RIP value. RSP: 002b:00007ffdeba51b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffdeba51b90 RSI: 00007ffdeba51c20 RDI: 00007ffdeba51c20 RBP: 00007ffdeba53930 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000206 R12: 0000000001b92940 R13: 0000000000000000 R14: 00007ffdeba53300 R15: 0000000000702140 INFO: task syz-executor6:8694 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D21352 8694 8672 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:1512 sb_start_write include/linux/fs.h:1585 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:364 do_unlinkat+0x2b7/0xa30 fs/namei.c:4086 __do_sys_unlink fs/namei.c:4151 [inline] __se_sys_unlink fs/namei.c:4149 [inline] __x64_sys_unlink+0x42/0x50 fs/namei.c:4149 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455b77 Code: Bad RIP value. RSP: 002b:00007ffd07006708 EFLAGS: 00000202 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455b77 RDX: 00007ffd07006710 RSI: 00007ffd070067a0 RDI: 00007ffd070067a0 RBP: 00007ffd070084b0 R08: 0000000000000000 R09: 000000000000000f R10: 000000000000000a R11: 0000000000000202 R12: 0000000002928940 R13: 0000000000000000 R14: 00007ffd07007e80 R15: 0000000000702140 INFO: task syz-executor5:11180 blocked for more than 140 seconds. Not tainted 4.18.0-rc4-next-20180710+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D25000 11180 4550 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:1512 sb_start_pagefault include/linux/fs.h:1614 [inline] ext4_page_mkwrite+0x1d0/0x1430 fs/ext4/inode.c:6127 do_page_mkwrite+0x14e/0x520 mm/memory.c:2386 wp_page_shared mm/memory.c:2682 [inline] do_wp_page+0xf78/0x19b0 mm/memory.c:2782 handle_pte_fault mm/memory.c:3995 [inline] __handle_mm_fault+0x2aab/0x4480 mm/memory.c:4103 handle_mm_fault+0x53e/0xc80 mm/memory.c:4140 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1397 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1472 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0033:0x4084b0 Code: 00 00 2e 23 40 00 00 00 00 00 3e 23 40 00 00 00 00 00 4e 23 40 00 00 00 00 00 5e 23 40 00 00 00 00 00 6e 23 40 00 00 00 00 00 <7e> 23 40 00 00 00 00 00 8e 23 40 00 00 00 00 00 9e 23 40 00 00 00 RSP: 002b:00007ffccdcebdc0 EFLAGS: 00010287 RAX: 0000001b2f9210f0 RBX: 0000000000000000 RCX: 0000001b30920000 RDX: 0000001b2f9210f4 RSI: 0000000000000006 RDI: 0000000000000006 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 00007ffccdcebe00 R11: 0000000000000246 R12: 0000000000000009 R13: 0000000000000002 R14: 000000000072bf48 R15: 000000000072bf48 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 901 Comm: khungtaskd Not tainted 4.18.0-rc4-next-20180710+ #3 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: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 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54