INFO: task udevd:7620 blocked for more than 143 seconds. Not tainted 5.1.0-rc3-next-20190408 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D27512 7620 3881 0x00000000 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1329 [inline] copy_mm kernel/fork.c:1385 [inline] copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 copy_process kernel/fork.c:1738 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2257 __do_sys_clone kernel/fork.c:2364 [inline] __se_sys_clone kernel/fork.c:2358 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2358 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f47c76b4f46 Code: Bad RIP value. RSP: 002b:00007ffe3220e6c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffe3220e6c0 RCX: 00007f47c76b4f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffe3220e720 R08: 0000000000001dc4 R09: 0000000000001dc4 R10: 00007f47c7fd1a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe3220e6e0 R14: 0000000000000005 R15: 0000000000000005 INFO: task udevd:7621 blocked for more than 143 seconds. Not tainted 5.1.0-rc3-next-20190408 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D28048 7621 3881 0x00000000 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1329 [inline] copy_mm kernel/fork.c:1385 [inline] copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 copy_process kernel/fork.c:1738 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2257 __do_sys_clone kernel/fork.c:2364 [inline] __se_sys_clone kernel/fork.c:2358 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2358 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f47c76b4f46 Code: Bad RIP value. RSP: 002b:00007ffe3220e6c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffe3220e6c0 RCX: 00007f47c76b4f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffe3220e720 R08: 0000000000001dc5 R09: 0000000000001dc5 R10: 00007f47c7fd1a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe3220e6e0 R14: 0000000000000005 R15: 0000000000000005 INFO: task syz-executor.0:7650 blocked for more than 143 seconds. Not tainted 5.1.0-rc3-next-20190408 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D22824 7650 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1329 [inline] copy_mm kernel/fork.c:1385 [inline] copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 copy_process kernel/fork.c:1738 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2257 __do_sys_clone kernel/fork.c:2364 [inline] __se_sys_clone kernel/fork.c:2358 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2358 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45688a Code: 83 ec 18 48 89 6c 24 10 48 8d 6c 24 10 48 8b 42 08 48 8b 4a 10 48 89 04 24 48 89 4c 24 08 e8 ed 74 00 00 48 8b 6c 24 10 48 83 18 c3 e8 1e 36 00 00 eb bc cc cc cc cc cc cc cc cc cc cc cc cc RSP: 002b:00007ffec85d8f70 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffec85d8f70 RCX: 000000000045688a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffec85d8fb0 R08: 0000000000000001 R09: 0000000000eb8940 R10: 0000000000eb8c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffec85d9000 INFO: task syz-executor.1:7653 blocked for more than 144 seconds. Not tainted 5.1.0-rc3-next-20190408 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D24176 7653 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1329 [inline] copy_mm kernel/fork.c:1385 [inline] copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 copy_process kernel/fork.c:1738 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2257 __do_sys_clone kernel/fork.c:2364 [inline] __se_sys_clone kernel/fork.c:2358 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2358 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45688a Code: 83 ec 18 48 89 6c 24 10 48 8d 6c 24 10 48 8b 42 08 48 8b 4a 10 48 89 04 24 48 89 4c 24 08 e8 ed 74 00 00 48 8b 6c 24 10 48 83 18 c3 e8 1e 36 00 00 eb bc cc cc cc cc cc cc cc cc cc cc cc cc RSP: 002b:00007fffa94f7a60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fffa94f7a60 RCX: 000000000045688a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fffa94f7aa0 R08: 0000000000000001 R09: 0000000000d9b940 R10: 0000000000d9bc10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007fffa94f7af0 INFO: task syz-executor.2:7656 blocked for more than 144 seconds. Not tainted 5.1.0-rc3-next-20190408 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D24176 7656 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1329 [inline] copy_mm kernel/fork.c:1385 [inline] copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 copy_process kernel/fork.c:1738 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2257 __do_sys_clone kernel/fork.c:2364 [inline] __se_sys_clone kernel/fork.c:2358 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2358 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45688a Code: 83 ec 18 48 89 6c 24 10 48 8d 6c 24 10 48 8b 42 08 48 8b 4a 10 48 89 04 24 48 89 4c 24 08 e8 ed 74 00 00 48 8b 6c 24 10 48 83 18 c3 e8 1e 36 00 00 eb bc cc cc cc cc cc cc cc cc cc cc cc cc RSP: 002b:00007fff06095ce0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fff06095ce0 RCX: 000000000045688a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fff06095d20 R08: 0000000000000001 R09: 0000000001ec5940 R10: 0000000001ec5c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007fff06095d70 INFO: task syz-executor.3:7658 blocked for more than 144 seconds. Not tainted 5.1.0-rc3-next-20190408 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D24352 7658 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1329 [inline] copy_mm kernel/fork.c:1385 [inline] copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 copy_process kernel/fork.c:1738 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2257 __do_sys_clone kernel/fork.c:2364 [inline] __se_sys_clone kernel/fork.c:2358 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2358 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45688a Code: 83 ec 18 48 89 6c 24 10 48 8d 6c 24 10 48 8b 42 08 48 8b 4a 10 48 89 04 24 48 89 4c 24 08 e8 ed 74 00 00 48 8b 6c 24 10 48 83 18 c3 e8 1e 36 00 00 eb bc cc cc cc cc cc cc cc cc cc cc cc cc RSP: 002b:00007ffd9b96f4a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffd9b96f4a0 RCX: 000000000045688a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffd9b96f4e0 R08: 0000000000000001 R09: 0000000001b46940 R10: 0000000001b46c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffd9b96f530 INFO: task syz-executor.4:7660 blocked for more than 144 seconds. Not tainted 5.1.0-rc3-next-20190408 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D24176 7660 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:285 [inline] rwsem_down_read_failed+0x213/0x420 kernel/locking/rwsem-xadd.c:302 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+0x8d/0xf0 kernel/locking/percpu-rwsem.c:41 percpu_down_read include/linux/percpu-rwsem.h:49 [inline] uprobe_start_dup_mmap+0xbf/0xe0 kernel/events/uprobes.c:1512 dup_mmap kernel/fork.c:471 [inline] dup_mm kernel/fork.c:1329 [inline] copy_mm kernel/fork.c:1385 [inline] copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 copy_process kernel/fork.c:1738 [inline] _do_fork+0x257/0xfd0 kernel/fork.c:2257 __do_sys_clone kernel/fork.c:2364 [inline] __se_sys_clone kernel/fork.c:2358 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2358 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45688a Code: 83 ec 18 48 89 6c 24 10 48 8d 6c 24 10 48 8b 42 08 48 8b 4a 10 48 89 04 24 48 89 4c 24 08 e8 ed 74 00 00 48 8b 6c 24 10 48 83 18 c3 e8 1e 36 00 00 eb bc cc cc cc cc cc cc cc cc cc cc cc cc RSP: 002b:00007ffc5ec09b00 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc5ec09b00 RCX: 000000000045688a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc5ec09b40 R08: 0000000000000001 R09: 0000000000fd1940 R10: 0000000000fd1c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffc5ec09b90 INFO: task syz-executor.5:6373 blocked for more than 145 seconds. Not tainted 5.1.0-rc3-next-20190408 #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28408 6373 7664 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 percpu_down_write+0x342/0x440 kernel/locking/percpu-rwsem.c:162 register_for_each_vma+0x8c/0xde0 kernel/events/uprobes.c:999 __uprobe_register kernel/events/uprobes.c:1131 [inline] __uprobe_register+0x45a/0x7c0 kernel/events/uprobes.c:1099 uprobe_register+0x28/0x30 kernel/events/uprobes.c:1146 probe_event_enable+0x474/0xc40 kernel/trace/trace_uprobe.c:929 trace_uprobe_register+0x7a/0x970 kernel/trace/trace_uprobe.c:1205 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+0x16e/0x210 kernel/trace/trace_event_perf.c:327 perf_uprobe_event_init+0x106/0x1a0 kernel/events/core.c:8744 perf_try_init_event+0x137/0x3f0 kernel/events/core.c:10013 perf_init_event kernel/events/core.c:10053 [inline] perf_event_alloc.part.0+0x1f2f/0x3200 kernel/events/core.c:10330 perf_event_alloc kernel/events/core.c:10700 [inline] __do_sys_perf_event_open+0x830/0x24e0 kernel/events/core.c:10801 __se_sys_perf_event_open kernel/events/core.c:10690 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10690 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4582b9 Code: 42 08 48 89 04 24 e8 c6 ee fc ff 48 8b 6c 24 08 48 83 c4 10 c3 e8 07 1c 00 00 eb c5 cc cc cc cc cc 64 48 8b 0c 25 f8 ff ff ff <48> 3b 61 10 0f 86 9b 00 00 00 48 83 ec 28 48 89 6c 24 20 48 8d 6c RSP: 002b:00007f777f89fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004582b9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000073c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f777f8a06d4 R13: 00000000004c48de R14: 00000000004d8450 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1044: #0: 0000000040d40e7f (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5061 1 lock held by rsyslogd/7523: #0: 000000008b6d4f8a (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by getty/7613: #0: 00000000d2ca583f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000001e861c9d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7614: #0: 00000000e48460b4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000010c5d2b0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7615: #0: 0000000073ccf9ab (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000043ab0aed (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7616: #0: 000000001529702c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000ab05f726 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7617: #0: 000000002aaa3d91 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000024f888f3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7618: #0: 00000000417a6414 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000138b8c33 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7619: #0: 000000004cb7c924 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000002a5b4417 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 1 lock held by udevd/7620: #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1329 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1385 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 1 lock held by udevd/7621: #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1329 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1385 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 1 lock held by syz-executor.0/7650: #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1329 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1385 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 1 lock held by syz-executor.1/7653: #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1329 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1385 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 1 lock held by syz-executor.2/7656: #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1329 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1385 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 1 lock held by syz-executor.3/7658: #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1329 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1385 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 1 lock held by syz-executor.4/7660: #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1329 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1385 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 1 lock held by syz-executor.5/6664: #0: 00000000deb867b7 (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236 1 lock held by syz-executor.5/6703: #0: 00000000deb867b7 (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236 1 lock held by syz-executor.5/6759: #0: 00000000deb867b7 (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236 1 lock held by syz-executor.5/6797: #0: 00000000deb867b7 (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236 1 lock held by syz-executor.5/6842: #0: 00000000deb867b7 (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236 1 lock held by syz-executor.0/26301: #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:471 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1329 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1385 [inline] #0: 000000005fd58f39 (&dup_mmap_sem){++++}, at: copy_process.part.0+0x2bcc/0x7a90 kernel/fork.c:1945 5 locks held by syz-executor.5/6373: #0: 00000000bcb98287 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x6d2/0x24e0 kernel/events/core.c:10781 #1: 00000000d60d9dc9 (&pmus_srcu){....}, at: perf_event_alloc.part.0+0xd57/0x3200 kernel/events/core.c:10326 #2: 00000000deb867b7 (event_mutex){+.+.}, at: perf_uprobe_init+0x163/0x210 kernel/trace/trace_event_perf.c:326 #3: 000000000e108636 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register kernel/events/uprobes.c:1127 [inline] #3: 000000000e108636 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register+0x3c9/0x7c0 kernel/events/uprobes.c:1099 #4: 000000005fd58f39 (&dup_mmap_sem){++++}, at: percpu_down_write+0x6a/0x440 kernel/locking/percpu-rwsem.c:145 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1044 Comm: khungtaskd Not tainted 5.1.0-rc3-next-20190408 #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+0x172/0x1f0 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:204 [inline] watchdog+0x9b7/0xec0 kernel/hung_task.c:288 kthread+0x357/0x430 kernel/kthread.c:254 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: