INFO: task syz-executor2:18254 blocked for more than 140 seconds. Not tainted 5.0.0-rc3-next-20190125 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D21640 18254 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2847 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3488 schedule+0xfe/0x350 kernel/sched/core.c:3532 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 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 kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1526 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x306e/0x8890 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45666a Code: Bad RIP value. RSP: 002b:00007ffd70566240 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffd70566240 RCX: 000000000045666a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffd70566280 R08: 0000000000000001 R09: 0000000001a36940 R10: 0000000001a36c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002 INFO: task syz-executor3:29045 blocked for more than 140 seconds. Not tainted 5.0.0-rc3-next-20190125 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D20440 29045 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2847 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3488 schedule+0xfe/0x350 kernel/sched/core.c:3532 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 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 kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1526 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x306e/0x8890 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45666a Code: Bad RIP value. RSP: 002b:00007ffec1659980 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffec1659980 RCX: 000000000045666a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffec16599c0 R08: 0000000000000001 R09: 0000000001bb9940 R10: 0000000001bb9c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000003 INFO: task syz-executor5:30515 blocked for more than 140 seconds. Not tainted 5.0.0-rc3-next-20190125 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D20440 30515 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2847 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3488 schedule+0xfe/0x350 kernel/sched/core.c:3532 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 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 kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1526 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x306e/0x8890 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45666a Code: Bad RIP value. RSP: 002b:00007ffe256b3c80 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffe256b3c80 RCX: 000000000045666a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffe256b3cc0 R08: 0000000000000001 R09: 0000000001fe8940 R10: 0000000001fe8c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 INFO: task syz-executor4:954 blocked for more than 140 seconds. Not tainted 5.0.0-rc3-next-20190125 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D20440 954 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2847 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3488 schedule+0xfe/0x350 kernel/sched/core.c:3532 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 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 kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1526 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x306e/0x8890 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45666a Code: Bad RIP value. RSP: 002b:00007fff7a915310 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fff7a915310 RCX: 000000000045666a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fff7a915350 R08: 0000000000000001 R09: 0000000000daf940 R10: 0000000000dafc10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000004 INFO: task udevd:1020 blocked for more than 140 seconds. Not tainted 5.0.0-rc3-next-20190125 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D24104 1020 3865 0x00000000 Call Trace: context_switch kernel/sched/core.c:2847 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3488 schedule+0xfe/0x350 kernel/sched/core.c:3532 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 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 kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1526 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x306e/0x8890 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f56bc613f46 Code: Bad RIP value. RSP: 002b:00007ffce7be9690 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffce7be9690 RCX: 00007f56bc613f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffce7be96f0 R08: 00000000000003fc R09: 00000000000003fc R10: 00007f56bcf30a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce7be96b0 R14: 0000000000000005 R15: 0000000000000005 INFO: task syz-executor1:7126 blocked for more than 140 seconds. Not tainted 5.0.0-rc3-next-20190125 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D21640 7126 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2847 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3488 schedule+0xfe/0x350 kernel/sched/core.c:3532 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 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 kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1526 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x306e/0x8890 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45666a Code: Bad RIP value. RSP: 002b:00007ffdfaa37a90 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffdfaa37a90 RCX: 000000000045666a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffdfaa37ad0 R08: 0000000000000001 R09: 0000000000dcb940 R10: 0000000000dcbc10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 INFO: task udevd:7328 blocked for more than 140 seconds. Not tainted 5.0.0-rc3-next-20190125 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D25672 7328 3865 0x00000000 Call Trace: context_switch kernel/sched/core.c:2847 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3488 schedule+0xfe/0x350 kernel/sched/core.c:3532 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:287 [inline] rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:304 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 kernel/locking/percpu-rwsem.c:85 [inline] __percpu_down_read+0x142/0x1d0 kernel/locking/percpu-rwsem.c:41 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:49 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1526 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x306e/0x8890 kernel/fork.c:1917 _do_fork+0x1a9/0x1170 kernel/fork.c:2227 __do_sys_clone kernel/fork.c:2334 [inline] __se_sys_clone kernel/fork.c:2328 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2328 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f56bc613f46 Code: Bad RIP value. RSP: 002b:00007ffce7be9690 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffce7be9690 RCX: 00007f56bc613f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffce7be96f0 R08: 0000000000001ca0 R09: 0000000000001ca0 R10: 00007f56bcf30a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce7be96b0 R14: 0000000000000005 R15: 0000000000000005 INFO: task syz-executor0:7827 blocked for more than 140 seconds. Not tainted 5.0.0-rc3-next-20190125 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D22760 7827 8044 0x00000004 Call Trace: context_switch kernel/sched/core.c:2847 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3488 schedule+0xfe/0x350 kernel/sched/core.c:3532 percpu_down_write+0x430/0x540 kernel/locking/percpu-rwsem.c:162 register_for_each_vma+0x99/0xef0 kernel/events/uprobes.c:1013 __uprobe_register kernel/events/uprobes.c:1145 [inline] __uprobe_register+0x507/0x8e0 kernel/events/uprobes.c:1113 uprobe_register+0x28/0x30 kernel/events/uprobes.c:1160 probe_event_enable+0x62d/0xf20 kernel/trace/trace_uprobe.c:924 trace_uprobe_register+0x69b/0xcf0 kernel/trace/trace_uprobe.c:1200 perf_trace_event_reg kernel/trace/trace_event_perf.c:124 [inline] perf_trace_event_init+0x500/0x990 kernel/trace/trace_event_perf.c:199 perf_uprobe_init+0x1db/0x290 kernel/trace/trace_event_perf.c:329 perf_uprobe_event_init+0x106/0x1a0 kernel/events/core.c:8503 perf_try_init_event+0x137/0x3f0 kernel/events/core.c:9770 perf_init_event kernel/events/core.c:9810 [inline] perf_event_alloc.part.0+0x22dc/0x3450 kernel/events/core.c:10083 perf_event_alloc kernel/events/core.c:10439 [inline] __do_sys_perf_event_open+0xb86/0x3030 kernel/events/core.c:10540 __se_sys_perf_event_open kernel/events/core.c:10429 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10429 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458099 Code: Bad RIP value. RSP: 002b:00007f0a3a8b5c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458099 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f0a3a8b66d4 R13: 00000000004c46c5 R14: 00000000004d7cc8 R15: 00000000ffffffff Showing all locks held in the system: 2 locks held by kworker/u4:3/79: #0: 00000000267a1743 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1149 [inline] #0: 00000000267a1743 (&rq->lock){-.-.}, at: __schedule+0x21e/0x1e60 kernel/sched/core.c:3426 #1: 000000004d56d89c (rcu_read_lock){....}, at: __update_idle_core+0xa8/0x5c0 kernel/sched/fair.c:6016 1 lock held by khungtaskd/1040: #0: 000000004d56d89c (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4393 3 locks held by rsyslogd/7897: #0: 0000000085c01c5c (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:796 #1: 00000000267a1743 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1149 [inline] #1: 00000000267a1743 (&rq->lock){-.-.}, at: __schedule+0x21e/0x1e60 kernel/sched/core.c:3426 #2: 000000004d56d89c (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #2: 000000004d56d89c (rcu_read_lock){....}, at: update_curr+0x362/0xbc0 kernel/sched/fair.c:829 2 locks held by getty/8010: #0: 00000000f9892456 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000374a2237 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2156 2 locks held by getty/8011: #0: 0000000020296ecf (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000be73a762 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2156 2 locks held by getty/8012: #0: 00000000eaa5a77b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000e89384a9 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2156 2 locks held by getty/8013: #0: 00000000de860b36 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000e9c8383b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2156 2 locks held by getty/8014: #0: 000000005c6777ec (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000064f7bc84 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2156 2 locks held by getty/8015: #0: 000000000f268b7f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000165e3082 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2156 2 locks held by getty/8016: #0: 000000001834ec71 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000f23687eb (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2156 1 lock held by syz-executor2/18254: #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_process+0x306e/0x8890 kernel/fork.c:1917 1 lock held by syz-executor3/29045: #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_process+0x306e/0x8890 kernel/fork.c:1917 1 lock held by syz-executor5/30515: #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_process+0x306e/0x8890 kernel/fork.c:1917 1 lock held by syz-executor4/954: #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_process+0x306e/0x8890 kernel/fork.c:1917 1 lock held by udevd/1020: #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_process+0x306e/0x8890 kernel/fork.c:1917 1 lock held by syz-executor1/7126: #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_process+0x306e/0x8890 kernel/fork.c:1917 1 lock held by udevd/7328: #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_process+0x306e/0x8890 kernel/fork.c:1917 1 lock held by syz-executor1/7654: #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 000000007fe9932b (&dup_mmap_sem){++++}, at: copy_process+0x306e/0x8890 kernel/fork.c:1917 5 locks held by syz-executor0/7827: #0: 0000000042fa9b07 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x99b/0x3030 kernel/events/core.c:10520 #1: 000000003cf1f50c (&pmus_srcu){....}, at: perf_event_alloc.part.0+0x1048/0x3450 kernel/events/core.c:10079 #2: 00000000e2b532e7 (event_mutex){+.+.}, at: perf_uprobe_init+0x1d0/0x290 kernel/trace/trace_event_perf.c:328 #3: 00000000f8b9f3af (&uprobe->register_rwsem){+.+.}, at: __uprobe_register kernel/events/uprobes.c:1141 [inline] #3: 00000000f8b9f3af (&uprobe->register_rwsem){+.+.}, at: __uprobe_register+0x465/0x8e0 kernel/events/uprobes.c:1113 #4: 000000007fe9932b (&dup_mmap_sem){++++}, at: percpu_down_write+0x9a/0x540 kernel/locking/percpu-rwsem.c:145 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc3-next-20190125 #20 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+0x1db/0x2d0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 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+0xbbb/0x1170 kernel/hung_task.c:287 kthread+0x357/0x430 kernel/kthread.c:247 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: