INFO: task syz-executor.4:1827 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28480 1827 1783 0x80000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x3ee/0x7c0 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 i_mmap_lock_write include/linux/fs.h:475 [inline] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 free_pgtables+0x78/0x1c0 mm/memory.c:630 exit_mmap+0x222/0x440 mm/mmap.c:3078 __mmput kernel/fork.c:940 [inline] mmput+0xeb/0x370 kernel/fork.c:961 exit_mm kernel/exit.c:545 [inline] do_exit+0x905/0x2a20 kernel/exit.c:862 do_group_exit+0x100/0x2e0 kernel/exit.c:978 get_signal+0x39f/0x1cc0 kernel/signal.c:2422 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413d7a RSP: 002b:00007fffc9e8ae88 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 000000000000072b RCX: 0000000000413d7a RDX: 0000000040000000 RSI: 00007fffc9e8ae94 RDI: ffffffffffffffff RBP: 00000000000000f8 R08: 0000000000000723 R09: 0000000001e23940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000415a40 R13: 00007fffc9e8b118 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:9053 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28480 9053 3093 0x80000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x3ee/0x7c0 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 i_mmap_lock_write include/linux/fs.h:475 [inline] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 free_pgtables+0x78/0x1c0 mm/memory.c:630 exit_mmap+0x222/0x440 mm/mmap.c:3078 __mmput kernel/fork.c:940 [inline] mmput+0xeb/0x370 kernel/fork.c:961 exit_mm kernel/exit.c:545 [inline] do_exit+0x905/0x2a20 kernel/exit.c:862 do_group_exit+0x100/0x2e0 kernel/exit.c:978 get_signal+0x39f/0x1cc0 kernel/signal.c:2422 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413d7a RSP: 002b:00007ffdaf9f2598 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 000000000000235e RCX: 0000000000413d7a RDX: 0000000040000000 RSI: 00007ffdaf9f25a4 RDI: ffffffffffffffff RBP: 00000000000000f8 R08: 000000000000235d R09: 0000000002753940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000415a40 R13: 00007ffdaf9f2828 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.0:9923 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27840 9923 3093 0x80000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x3ee/0x7c0 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 i_mmap_lock_write include/linux/fs.h:475 [inline] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 free_pgtables+0x78/0x1c0 mm/memory.c:630 exit_mmap+0x222/0x440 mm/mmap.c:3078 __mmput kernel/fork.c:940 [inline] mmput+0xeb/0x370 kernel/fork.c:961 exit_mm kernel/exit.c:545 [inline] do_exit+0x905/0x2a20 kernel/exit.c:862 do_group_exit+0x100/0x2e0 kernel/exit.c:978 get_signal+0x39f/0x1cc0 kernel/signal.c:2422 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413d7a RSP: 002b:00007ffcc7913958 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 00000000000026c4 RCX: 0000000000413d7a RDX: 0000000040000000 RSI: 00007ffcc7913964 RDI: ffffffffffffffff RBP: 00000000000000f8 R08: 00000000000026c3 R09: 000000000238f940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000415a40 R13: 00007ffcc7913be8 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.3:10677 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D27840 10677 3093 0x80000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x3ee/0x7c0 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 i_mmap_lock_write include/linux/fs.h:475 [inline] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 free_pgtables+0x78/0x1c0 mm/memory.c:630 exit_mmap+0x222/0x440 mm/mmap.c:3078 __mmput kernel/fork.c:940 [inline] mmput+0xeb/0x370 kernel/fork.c:961 exit_mm kernel/exit.c:545 [inline] do_exit+0x905/0x2a20 kernel/exit.c:862 do_group_exit+0x100/0x2e0 kernel/exit.c:978 get_signal+0x39f/0x1cc0 kernel/signal.c:2422 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413d7a RSP: 002b:00007ffdf22bb708 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 00000000000029b6 RCX: 0000000000413d7a RDX: 0000000040000000 RSI: 00007ffdf22bb714 RDI: ffffffffffffffff RBP: 00000000000000f8 R08: 00000000000029b5 R09: 00000000026fe940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000415a40 R13: 00007ffdf22bb998 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.3:10678 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D25280 10678 10677 0x00000000 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x3ee/0x7c0 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 i_mmap_lock_write include/linux/fs.h:475 [inline] dup_mmap kernel/fork.c:686 [inline] dup_mm kernel/fork.c:1213 [inline] copy_mm kernel/fork.c:1268 [inline] copy_process.part.0+0x246a/0x66c0 kernel/fork.c:1895 copy_process kernel/fork.c:1679 [inline] _do_fork+0x197/0xce0 kernel/fork.c:2220 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45850a RSP: 002b:00007ffdf22bb4e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffdf22bb4e0 RCX: 000000000045850a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffdf22bb520 R08: 0000000000000001 R09: 00000000026fe940 R10: 00000000026fec10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffdf22bb570 INFO: task syz-executor.2:12507 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28480 12507 1793 0x80000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x3ee/0x7c0 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 i_mmap_lock_write include/linux/fs.h:475 [inline] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 free_pgtables+0x78/0x1c0 mm/memory.c:630 exit_mmap+0x222/0x440 mm/mmap.c:3078 __mmput kernel/fork.c:940 [inline] mmput+0xeb/0x370 kernel/fork.c:961 exit_mm kernel/exit.c:545 [inline] do_exit+0x905/0x2a20 kernel/exit.c:862 do_group_exit+0x100/0x2e0 kernel/exit.c:978 get_signal+0x39f/0x1cc0 kernel/signal.c:2422 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413d7a RSP: 002b:00007ffc0154a008 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 00000000000030dc RCX: 0000000000413d7a RDX: 0000000040000000 RSI: 00007ffc0154a014 RDI: ffffffffffffffff RBP: 00000000000000f8 R08: 00000000000030db R09: 0000000002588940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000415a40 R13: 00007ffc0154a298 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.5:15018 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D27840 15018 1783 0x80000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x3ee/0x7c0 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 i_mmap_lock_write include/linux/fs.h:475 [inline] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 free_pgtables+0x78/0x1c0 mm/memory.c:630 exit_mmap+0x222/0x440 mm/mmap.c:3078 __mmput kernel/fork.c:940 [inline] mmput+0xeb/0x370 kernel/fork.c:961 exit_mm kernel/exit.c:545 [inline] do_exit+0x905/0x2a20 kernel/exit.c:862 do_group_exit+0x100/0x2e0 kernel/exit.c:978 get_signal+0x39f/0x1cc0 kernel/signal.c:2422 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x413d7a RSP: 002b:00007ffe8bf686c8 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 0000000000003aab RCX: 0000000000413d7a RDX: 0000000040000000 RSI: 00007ffe8bf686d4 RDI: ffffffffffffffff RBP: 00000000000000f8 R08: 0000000000003aaa R09: 00000000010b2940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000415a40 R13: 00007ffe8bf68958 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:19892 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D29088 19892 9054 0x80000000 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x3ee/0x7c0 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 i_mmap_lock_write include/linux/fs.h:475 [inline] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 free_pgtables+0xb3/0x1c0 mm/memory.c:644 exit_mmap+0x222/0x440 mm/mmap.c:3078 __mmput kernel/fork.c:940 [inline] mmput+0xeb/0x370 kernel/fork.c:961 exit_mm kernel/exit.c:545 [inline] do_exit+0x905/0x2a20 kernel/exit.c:862 do_group_exit+0x100/0x2e0 kernel/exit.c:978 get_signal+0x39f/0x1cc0 kernel/signal.c:2422 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459f39 RSP: 002b:00007fc6c7b39cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 000000000075c1c8 RCX: 0000000000459f39 RDX: 00000000004c846f RSI: 0000000000000081 RDI: 000000000075c1cc RBP: 000000000075c1c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075c1cc R13: 00007ffdaf9f218f R14: 00007fc6c7b3a9c0 R15: 000000000075c1cc INFO: task syz-executor.0:19852 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D26768 19852 9924 0x80000000 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x3ee/0x7c0 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 i_mmap_lock_write include/linux/fs.h:475 [inline] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 free_pgtables+0xb3/0x1c0 mm/memory.c:644 exit_mmap+0x222/0x440 mm/mmap.c:3078 __mmput kernel/fork.c:940 [inline] mmput+0xeb/0x370 kernel/fork.c:961 exit_mm kernel/exit.c:545 [inline] do_exit+0x905/0x2a20 kernel/exit.c:862 do_group_exit+0x100/0x2e0 kernel/exit.c:978 get_signal+0x39f/0x1cc0 kernel/signal.c:2422 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459f39 RSP: 002b:00007f2a7869ccf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000075bfd0 RCX: 0000000000459f39 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bfd0 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bfd4 R13: 00007ffcc791354f R14: 00007f2a7869d9c0 R15: 000000000075bfd4 INFO: task syz-executor.4:19858 blocked for more than 140 seconds. Not tainted 4.14.150+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D27584 19858 1835 0x80000000 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3498 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline] rwsem_down_write_failed+0x3ee/0x7c0 kernel/locking/rwsem-xadd.c:617 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105 __down_write arch/x86/include/asm/rwsem.h:126 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:56 i_mmap_lock_write include/linux/fs.h:475 [inline] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 free_pgtables+0xb3/0x1c0 mm/memory.c:644 exit_mmap+0x222/0x440 mm/mmap.c:3078 __mmput kernel/fork.c:940 [inline] mmput+0xeb/0x370 kernel/fork.c:961 exit_mm kernel/exit.c:545 [inline] do_exit+0x905/0x2a20 kernel/exit.c:862 do_group_exit+0x100/0x2e0 kernel/exit.c:978 get_signal+0x39f/0x1cc0 kernel/signal.c:2422 do_signal+0x96/0x15d0 arch/x86/kernel/signal.c:814 exit_to_usermode_loop+0x11d/0x160 arch/x86/entry/common.c:160 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x3a3/0x520 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459f39 RSP: 002b:00007f5f3f863c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 RAX: fffffffffffffdfc RBX: 0000000000000003 RCX: 0000000000459f39 RDX: 00000000ffffffff RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5f3f8646d4 R13: 00000000004c7252 R14: 00000000004dcbf0 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [<00000000bd559043>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4544 2 locks held by getty/1761: #0: (&tty->ldisc_sem){++++}, at: [<00000000d7010839>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<000000003cce8df2>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.4/1827: #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] i_mmap_lock_write include/linux/fs.h:475 [inline] #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 1 lock held by syz-executor.1/9053: #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] i_mmap_lock_write include/linux/fs.h:475 [inline] #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 1 lock held by syz-executor.0/9923: #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] i_mmap_lock_write include/linux/fs.h:475 [inline] #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 1 lock held by syz-executor.3/10677: #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] i_mmap_lock_write include/linux/fs.h:475 [inline] #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 4 locks held by syz-executor.3/10678: #0: (&dup_mmap_sem){.+.+}, at: [<000000005de6ce79>] dup_mmap kernel/fork.c:611 [inline] #0: (&dup_mmap_sem){.+.+}, at: [<000000005de6ce79>] dup_mm kernel/fork.c:1213 [inline] #0: (&dup_mmap_sem){.+.+}, at: [<000000005de6ce79>] copy_mm kernel/fork.c:1268 [inline] #0: (&dup_mmap_sem){.+.+}, at: [<000000005de6ce79>] copy_process.part.0+0x1ff5/0x66c0 kernel/fork.c:1895 #1: (&mm->mmap_sem){++++}, at: [<00000000e39ef6d8>] dup_mmap kernel/fork.c:612 [inline] #1: (&mm->mmap_sem){++++}, at: [<00000000e39ef6d8>] dup_mm kernel/fork.c:1213 [inline] #1: (&mm->mmap_sem){++++}, at: [<00000000e39ef6d8>] copy_mm kernel/fork.c:1268 [inline] #1: (&mm->mmap_sem){++++}, at: [<00000000e39ef6d8>] copy_process.part.0+0x2011/0x66c0 kernel/fork.c:1895 #2: (&mm->mmap_sem/1){+.+.}, at: [<00000000419adc81>] dup_mmap kernel/fork.c:621 [inline] #2: (&mm->mmap_sem/1){+.+.}, at: [<00000000419adc81>] dup_mm kernel/fork.c:1213 [inline] #2: (&mm->mmap_sem/1){+.+.}, at: [<00000000419adc81>] copy_mm kernel/fork.c:1268 [inline] #2: (&mm->mmap_sem/1){+.+.}, at: [<00000000419adc81>] copy_process.part.0+0x204c/0x66c0 kernel/fork.c:1895 #3: (&mapping->i_mmap_rwsem){++++}, at: [<000000007b591d0a>] i_mmap_lock_write include/linux/fs.h:475 [inline] #3: (&mapping->i_mmap_rwsem){++++}, at: [<000000007b591d0a>] dup_mmap kernel/fork.c:686 [inline] #3: (&mapping->i_mmap_rwsem){++++}, at: [<000000007b591d0a>] dup_mm kernel/fork.c:1213 [inline] #3: (&mapping->i_mmap_rwsem){++++}, at: [<000000007b591d0a>] copy_mm kernel/fork.c:1268 [inline] #3: (&mapping->i_mmap_rwsem){++++}, at: [<000000007b591d0a>] copy_process.part.0+0x246a/0x66c0 kernel/fork.c:1895 1 lock held by syz-executor.2/12507: #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] i_mmap_lock_write include/linux/fs.h:475 [inline] #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 1 lock held by syz-executor.5/15018: #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] i_mmap_lock_write include/linux/fs.h:475 [inline] #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 1 lock held by syz-executor.0/19852: #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] i_mmap_lock_write include/linux/fs.h:475 [inline] #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 1 lock held by syz-executor.4/19858: #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] i_mmap_lock_write include/linux/fs.h:475 [inline] #0: (&mapping->i_mmap_rwsem){++++}, at: [<000000002cfb889a>] unlink_file_vma+0x6e/0xa0 mm/mmap.c:158 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.150+ #0 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xca/0x134 lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x119/0x147 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x629/0xbe0 kernel/hung_task.c:274 kthread+0x31f/0x430 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 19944 Comm: syz-executor.3 Not tainted 4.14.150+ #0 task: 00000000f25baaa3 task.stack: 00000000796d21fe RIP: 0010:check_preemption_disabled+0xc/0x1f0 lib/smp_processor_id.c:13 RSP: 0018:ffff888193ea78d0 EFLAGS: 00000012 RAX: 0000000000040000 RBX: 0000607e242181c8 RCX: 0000000000000232 RDX: ffffffff81bd6c55 RSI: ffffffff8514a640 RDI: ffffffff8514a680 RBP: ffff888193ea79e0 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff833f5ea0 R11: ffffffff85a2ffeb R12: ffffffff856c0e20 R13: ffffffff8514a640 R14: ffff888193ea79b8 R15: 0000000000000000 FS: 00007fd2ae785700(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000738000 CR3: 0000000173b58001 CR4: 00000000001606b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_trace_lock_acquire+0x122/0x4e0 include/trace/events/lock.h:13 trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x279/0x360 kernel/locking/lockdep.c:3993 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 alloc_object lib/debugobjects.c:150 [inline] __debug_object_init+0x1d2/0x7d0 lib/debugobjects.c:349 debug_hrtimer_init kernel/time/hrtimer.c:396 [inline] debug_init kernel/time/hrtimer.c:441 [inline] hrtimer_init+0x27/0x2f0 kernel/time/hrtimer.c:1170 init_dl_task_timer+0x17/0x50 kernel/sched/deadline.c:1024 __sched_fork.isra.0+0x215/0x440 kernel/sched/core.c:2250 sched_fork+0x2e/0xda0 kernel/sched/core.c:2407 copy_process.part.0+0x12ad/0x66c0 kernel/fork.c:1865 copy_process kernel/fork.c:1679 [inline] _do_fork+0x197/0xce0 kernel/fork.c:2220 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459f39 RSP: 002b:00007fd2ae784c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459f39 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 03000000a0160101 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd2ae7856d4 R13: 00000000004c05bf R14: 00000000004d2ab0 R15: 00000000ffffffff Code: ff ff e8 18 83 96 ff e9 eb f2 ff ff e8 5e 21 50 ff 48 8b 3c 24 e8 e5 82 96 ff e9 c6 f7 ff ff 41 57 41 56 41 55 49 89 f5 41 54 55 <48> 89 fd 53 e8 6b b6 73 ff 65 44 8b 25 b3 16 24 7c 65 8b 05 cc