hfs: can't find a HFS filesystem on dev loop3 INFO: task udevd:4711 blocked for more than 140 seconds. Not tainted 4.19.0-rc2-next-20180904+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D22488 4711 2538 0x00000000 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x610 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] uprobe_start_dup_mmap+0x99/0xa0 kernel/events/uprobes.c:1259 dup_mmap kernel/fork.c:431 [inline] dup_mm kernel/fork.c:1275 [inline] copy_mm kernel/fork.c:1330 [inline] copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 _do_fork+0x1ca/0x1170 kernel/fork.c:2169 __do_sys_clone kernel/fork.c:2276 [inline] __se_sys_clone kernel/fork.c:2270 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2270 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f78fd4a8f46 Code: Bad RIP value. RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffcefe84ba0 R08: 0000000000001267 R09: 0000000000001267 R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005 INFO: task udevd:4712 blocked for more than 140 seconds. Not tainted 4.19.0-rc2-next-20180904+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D22488 4712 2538 0x00000000 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x610 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] uprobe_start_dup_mmap+0x99/0xa0 kernel/events/uprobes.c:1259 dup_mmap kernel/fork.c:431 [inline] dup_mm kernel/fork.c:1275 [inline] copy_mm kernel/fork.c:1330 [inline] copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 _do_fork+0x1ca/0x1170 kernel/fork.c:2169 __do_sys_clone kernel/fork.c:2276 [inline] __se_sys_clone kernel/fork.c:2270 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2270 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f78fd4a8f46 Code: Bad RIP value. RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffcefe84ba0 R08: 0000000000001268 R09: 0000000000001268 R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005 INFO: task syz-executor0:4752 blocked for more than 140 seconds. Not tainted 4.19.0-rc2-next-20180904+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D21560 4752 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x610 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] uprobe_start_dup_mmap+0x99/0xa0 kernel/events/uprobes.c:1259 dup_mmap kernel/fork.c:431 [inline] dup_mm kernel/fork.c:1275 [inline] copy_mm kernel/fork.c:1330 [inline] copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 _do_fork+0x1ca/0x1170 kernel/fork.c:2169 __do_sys_clone kernel/fork.c:2276 [inline] __se_sys_clone kernel/fork.c:2270 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2270 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45574a Code: Bad RIP value. RSP: 002b:00007ffdcdf7a290 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffdcdf7a290 RCX: 000000000045574a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffdcdf7a2d0 R08: 0000000000000001 R09: 00000000011d9940 R10: 00000000011d9c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: badc0ffeebadface INFO: task syz-executor1:4754 blocked for more than 140 seconds. Not tainted 4.19.0-rc2-next-20180904+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D21032 4754 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x610 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] uprobe_start_dup_mmap+0x99/0xa0 kernel/events/uprobes.c:1259 dup_mmap kernel/fork.c:431 [inline] dup_mm kernel/fork.c:1275 [inline] copy_mm kernel/fork.c:1330 [inline] copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 _do_fork+0x1ca/0x1170 kernel/fork.c:2169 __do_sys_clone kernel/fork.c:2276 [inline] __se_sys_clone kernel/fork.c:2270 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2270 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45574a Code: Bad RIP value. RSP: 002b:00007fff590938d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fff590938d0 RCX: 000000000045574a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fff59093910 R08: 0000000000000001 R09: 0000000001d2a940 R10: 0000000001d2ac10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: badc0ffeebadface INFO: task syz-executor6:4756 blocked for more than 140 seconds. Not tainted 4.19.0-rc2-next-20180904+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D21184 4756 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x610 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] uprobe_start_dup_mmap+0x99/0xa0 kernel/events/uprobes.c:1259 dup_mmap kernel/fork.c:431 [inline] dup_mm kernel/fork.c:1275 [inline] copy_mm kernel/fork.c:1330 [inline] copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 _do_fork+0x1ca/0x1170 kernel/fork.c:2169 __do_sys_clone kernel/fork.c:2276 [inline] __se_sys_clone kernel/fork.c:2270 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2270 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45574a Code: Bad RIP value. RSP: 002b:00007ffce5b71030 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffce5b71030 RCX: 000000000045574a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffce5b71070 R08: 0000000000000001 R09: 0000000002588940 R10: 0000000002588c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: badc0ffeebadface INFO: task syz-executor7:4758 blocked for more than 140 seconds. Not tainted 4.19.0-rc2-next-20180904+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor7 D21184 4758 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x610 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] uprobe_start_dup_mmap+0x99/0xa0 kernel/events/uprobes.c:1259 dup_mmap kernel/fork.c:431 [inline] dup_mm kernel/fork.c:1275 [inline] copy_mm kernel/fork.c:1330 [inline] copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 _do_fork+0x1ca/0x1170 kernel/fork.c:2169 __do_sys_clone kernel/fork.c:2276 [inline] __se_sys_clone kernel/fork.c:2270 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2270 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45574a Code: Bad RIP value. RSP: 002b:00007ffc193b1590 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffc193b1590 RCX: 000000000045574a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffc193b15d0 R08: 0000000000000001 R09: 0000000001c79940 R10: 0000000001c79c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: badc0ffeebadface INFO: task udevd:6793 blocked for more than 140 seconds. Not tainted 4.19.0-rc2-next-20180904+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D22488 6793 2538 0x00000000 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x610 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] uprobe_start_dup_mmap+0x99/0xa0 kernel/events/uprobes.c:1259 dup_mmap kernel/fork.c:431 [inline] dup_mm kernel/fork.c:1275 [inline] copy_mm kernel/fork.c:1330 [inline] copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 _do_fork+0x1ca/0x1170 kernel/fork.c:2169 __do_sys_clone kernel/fork.c:2276 [inline] __se_sys_clone kernel/fork.c:2270 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2270 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f78fd4a8f46 Code: Bad RIP value. RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffcefe84ba0 R08: 0000000000001a89 R09: 0000000000001a89 R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005 INFO: task udevd:6805 blocked for more than 140 seconds. Not tainted 4.19.0-rc2-next-20180904+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D22488 6805 2538 0x00000000 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x610 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] uprobe_start_dup_mmap+0x99/0xa0 kernel/events/uprobes.c:1259 dup_mmap kernel/fork.c:431 [inline] dup_mm kernel/fork.c:1275 [inline] copy_mm kernel/fork.c:1330 [inline] copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 _do_fork+0x1ca/0x1170 kernel/fork.c:2169 __do_sys_clone kernel/fork.c:2276 [inline] __se_sys_clone kernel/fork.c:2270 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2270 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f78fd4a8f46 Code: Bad RIP value. RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffcefe84ba0 R08: 0000000000001a95 R09: 0000000000001a95 R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005 INFO: task udevd:6813 blocked for more than 140 seconds. Not tainted 4.19.0-rc2-next-20180904+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D22488 6813 2538 0x00000000 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x610 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] uprobe_start_dup_mmap+0x99/0xa0 kernel/events/uprobes.c:1259 dup_mmap kernel/fork.c:431 [inline] dup_mm kernel/fork.c:1275 [inline] copy_mm kernel/fork.c:1330 [inline] copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 _do_fork+0x1ca/0x1170 kernel/fork.c:2169 __do_sys_clone kernel/fork.c:2276 [inline] __se_sys_clone kernel/fork.c:2270 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2270 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f78fd4a8f46 Code: Bad RIP value. RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffcefe84ba0 R08: 0000000000001a9d R09: 0000000000001a9d R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005 INFO: task udevd:7279 blocked for more than 140 seconds. Not tainted 4.19.0-rc2-next-20180904+ #55 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D22944 7279 2538 0x00000000 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:269 [inline] rwsem_down_read_failed+0x362/0x610 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] uprobe_start_dup_mmap+0x99/0xa0 kernel/events/uprobes.c:1259 dup_mmap kernel/fork.c:431 [inline] dup_mm kernel/fork.c:1275 [inline] copy_mm kernel/fork.c:1330 [inline] copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 _do_fork+0x1ca/0x1170 kernel/fork.c:2169 __do_sys_clone kernel/fork.c:2276 [inline] __se_sys_clone kernel/fork.c:2270 [inline] __x64_sys_clone+0xbf/0x150 kernel/fork.c:2270 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f78fd4a8f46 Code: Bad RIP value. RSP: 002b:00007ffcefe84b40 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffcefe84b40 RCX: 00007f78fd4a8f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffcefe84ba0 R08: 0000000000001c6f R09: 0000000000001c6f R10: 00007f78fddc5a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcefe84b60 R14: 0000000000000005 R15: 0000000000000005 Showing all locks held in the system: 1 lock held by khungtaskd/792: #0: 00000000010c3b8a (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x428 kernel/locking/lockdep.c:4436 1 lock held by rsyslogd/4614: 2 locks held by getty/4704: #0: 000000007272e650 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000d0ad5199 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4705: #0: 00000000ee01b3d2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000cb4b72e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4706: #0: 00000000b1d1bfa1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000d8a1ad0c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4707: #0: 00000000d748ecc1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000003e534095 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4708: #0: 000000008ec58632 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000f247898c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4709: #0: 000000001ebc9104 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000c5deaf68 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/4710: #0: 00000000da7ef2b1 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000003a231089 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 1 lock held by udevd/4711: #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 1 lock held by udevd/4712: #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 1 lock held by syz-executor0/4752: #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 1 lock held by syz-executor1/4754: #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 1 lock held by syz-executor6/4756: #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 1 lock held by syz-executor7/4758: #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 1 lock held by udevd/6793: #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 1 lock held by udevd/6805: #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 1 lock held by udevd/6813: #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 1 lock held by udevd/7279: #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 1 lock held by syz-executor0/18570: #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:431 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1275 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1330 [inline] #0: 00000000077431f3 (&dup_mmap_sem){++++}, at: copy_process+0x2b3d/0x7af0 kernel/fork.c:1870 1 lock held by syz-executor5/30110: #0: 00000000df7208fd (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236 5 locks held by syz-executor5/30115: #0: 00000000432a4d43 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10480 #1: 0000000043990672 (&pmus_srcu){....}, at: perf_event_alloc.part.93+0xffc/0x33c0 kernel/events/core.c:10039 #2: 00000000df7208fd (event_mutex){+.+.}, at: perf_uprobe_init+0x1da/0x280 kernel/trace/trace_event_perf.c:327 #3: 00000000eb6356ce (&uprobe->register_rwsem){+.+.}, at: __uprobe_register kernel/events/uprobes.c:922 [inline] #3: 00000000eb6356ce (&uprobe->register_rwsem){+.+.}, at: uprobe_register+0x3dd/0x7c0 kernel/events/uprobes.c:941 #4: 00000000077431f3 (&dup_mmap_sem){++++}, at: percpu_down_write+0xaf/0x540 kernel/locking/percpu-rwsem.c:145 1 lock held by syz-executor4/30114: #0: 00000000df7208fd (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:236 3 locks held by syz-executor4/30117: #0: 000000007654572a (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10480 #1: 0000000043990672 (&pmus_srcu){....}, at: perf_event_alloc.part.93+0xffc/0x33c0 kernel/events/core.c:10039 kworker/dying (7) used greatest stack depth: 11432 bytes left #2: 00000000df7208fd (event_mutex){+.+.}, at: perf_trace_init+0x50/0x250 kernel/trace/trace_event_perf.c:218 3 locks held by syz-executor3/30125: #0: 00000000fc87ade4 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10480 #1: 0000000043990672 (&pmus_srcu){....}, at: perf_event_alloc.part.93+0xffc/0x33c0 kernel/events/core.c:10039 #2: 00000000df7208fd (event_mutex){+.+.}, at: perf_trace_init+0x50/0x250 kernel/trace/trace_event_perf.c:218 3 locks held by syz-executor2/30129: #0: 00000000d282122d (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10480 #1: 0000000043990672 (&pmus_srcu){....}, at: perf_event_alloc.part.93+0xffc/0x33c0 kernel/events/core.c:10039 #2: 00000000df7208fd (event_mutex){+.+.}, at: perf_trace_init+0x50/0x250 kernel/trace/trace_event_perf.c:218 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 792 Comm: khungtaskd Not tainted 4.19.0-rc2-next-20180904+ #55 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:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb39/0x1040 kernel/hung_task.c:265 kthread+0x35a/0x420 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:57