audit: type=1804 audit(1548667993.752:493): pid=22529 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor3" name="/root/syzkaller-testdir375332373/syzkaller.SEBCBX/306/bus" dev="sda1" ino=16866 res=1 INFO: task syz-executor4:17714 blocked for more than 140 seconds. Not tainted 5.0.0-rc4 #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D20856 17714 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __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:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 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: ff 48 8b 54 24 28 e9 ad fe ff ff 8b 9c 24 88 00 00 00 e9 6f ff ff ff 48 8b 6c 24 70 48 83 c4 78 c3 48 8b 6c 24 70 48 83 c4 78 e8 30 38 fd ff 0f 0b e8 09 39 fd ff 0f 0b e8 d2 38 00 00 e9 8d RSP: 002b:00007ffec1321ca0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffec1321ca0 RCX: 000000000045666a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffec1321ce0 R08: 0000000000000001 R09: 0000000000ae6940 R10: 0000000000ae6c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000004 INFO: task syz-executor0:17718 blocked for more than 140 seconds. Not tainted 5.0.0-rc4 #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D20440 17718 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __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:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 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: ff 48 8b 54 24 28 e9 ad fe ff ff 8b 9c 24 88 00 00 00 e9 6f ff ff ff 48 8b 6c 24 70 48 83 c4 78 c3 48 8b 6c 24 70 48 83 c4 78 e8 30 38 fd ff 0f 0b e8 09 39 fd ff 0f 0b e8 d2 38 00 00 e9 8d RSP: 002b:00007ffd0d366810 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffd0d366810 RCX: 000000000045666a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffd0d366850 R08: 0000000000000001 R09: 0000000001def940 R10: 0000000001defc10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor5:17722 blocked for more than 140 seconds. Not tainted 5.0.0-rc4 #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D21640 17722 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __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:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 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: ff 48 8b 54 24 28 e9 ad fe ff ff 8b 9c 24 88 00 00 00 e9 6f ff ff ff 48 8b 6c 24 70 48 83 c4 78 c3 48 8b 6c 24 70 48 83 c4 78 e8 30 38 fd ff 0f 0b e8 09 39 fd ff 0f 0b e8 d2 38 00 00 e9 8d RSP: 002b:00007fff2db577d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fff2db577d0 RCX: 000000000045666a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fff2db57810 R08: 0000000000000001 R09: 00000000025bd940 R10: 00000000025bdc10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005 INFO: task syz-executor1:19280 blocked for more than 140 seconds. Not tainted 5.0.0-rc4 #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D21352 19280 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __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:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 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: ff 48 8b 54 24 28 e9 ad fe ff ff 8b 9c 24 88 00 00 00 e9 6f ff ff ff 48 8b 6c 24 70 48 83 c4 78 c3 48 8b 6c 24 70 48 83 c4 78 e8 30 38 fd ff 0f 0b e8 09 39 fd ff 0f 0b e8 d2 38 00 00 e9 8d RSP: 002b:00007ffd479f3d50 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffd479f3d50 RCX: 000000000045666a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffd479f3d90 R08: 0000000000000001 R09: 0000000000b6a940 R10: 0000000000b6ac10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 INFO: task udevd:19840 blocked for more than 140 seconds. Not tainted 5.0.0-rc4 #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D25144 19840 3868 0x00000000 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __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:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 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: 0033:0x7fe1aefbaf46 Code: Bad RIP value. RSP: 002b:00007ffda8271c00 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffda8271c00 RCX: 00007fe1aefbaf46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffda8271c60 R08: 0000000000004d80 R09: 0000000000004d80 R10: 00007fe1af8d7a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffda8271c20 R14: 0000000000000005 R15: 0000000000000005 INFO: task udevd:20129 blocked for more than 140 seconds. Not tainted 5.0.0-rc4 #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. udevd D25272 20129 3868 0x00000000 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 __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:1525 dup_mmap kernel/fork.c:472 [inline] dup_mm kernel/fork.c:1320 [inline] copy_mm kernel/fork.c:1375 [inline] copy_process+0x3041/0x8860 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: 0033:0x7fe1aefbaf46 Code: Bad RIP value. RSP: 002b:00007ffda8271c00 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007ffda8271c00 RCX: 00007fe1aefbaf46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007ffda8271c60 R08: 0000000000004ea1 R09: 0000000000004ea1 R10: 00007fe1af8d7a70 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffda8271c20 R14: 0000000000000005 R15: 0000000000000005 INFO: task syz-executor3:22507 blocked for more than 140 seconds. Not tainted 5.0.0-rc4 #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D22840 22507 15178 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 percpu_down_write+0x430/0x540 kernel/locking/percpu-rwsem.c:162 register_for_each_vma+0x99/0xef0 kernel/events/uprobes.c:1012 __uprobe_register kernel/events/uprobes.c:1144 [inline] __uprobe_register+0x507/0x8e0 kernel/events/uprobes.c:1112 uprobe_register_refctr+0x2e/0x40 kernel/events/uprobes.c:1166 probe_event_enable+0x849/0xf20 kernel/trace/trace_uprobe.c:921 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+0x137/0x2f0 kernel/events/core.c:9770 perf_init_event kernel/events/core.c:9801 [inline] perf_event_alloc.part.0+0x20bf/0x3520 kernel/events/core.c:10074 perf_event_alloc kernel/events/core.c:10430 [inline] __do_sys_perf_event_open+0xbb5/0x2f00 kernel/events/core.c:10531 __se_sys_perf_event_open kernel/events/core.c:10420 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10420 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458099 Code: 01 00 00 48 89 74 24 38 48 89 7c 24 30 4c 89 44 24 28 44 88 4c 24 27 48 89 54 24 50 48 89 44 24 40 48 c7 80 f8 00 00 00 00 00 <00> 00 4c 89 90 00 01 00 00 8b 0d b8 68 23 01 4c 8d 90 f0 00 00 00 RSP: 002b:00007fa3b8980c78 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: 00007fa3b89816d4 R13: 00000000004c46c5 R14: 00000000004d7cc8 R15: 00000000ffffffff INFO: task syz-executor2:22518 blocked for more than 140 seconds. Not tainted 5.0.0-rc4 #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor2 D26032 22518 22074 0x00000004 Call Trace: context_switch kernel/sched/core.c:2844 [inline] __schedule+0x897/0x1e60 kernel/sched/core.c:3485 schedule+0xfe/0x350 kernel/sched/core.c:3529 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3587 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xa3b/0x1670 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 perf_trace_init+0x58/0x250 kernel/trace/trace_event_perf.c:218 perf_tp_event_init+0xa6/0x120 kernel/events/core.c:8352 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9770 perf_init_event kernel/events/core.c:9808 [inline] perf_event_alloc.part.0+0x1361/0x3520 kernel/events/core.c:10074 perf_event_alloc kernel/events/core.c:10430 [inline] __do_sys_perf_event_open+0xbb5/0x2f00 kernel/events/core.c:10531 __se_sys_perf_event_open kernel/events/core.c:10420 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10420 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458099 Code: 01 00 00 48 89 74 24 38 48 89 7c 24 30 4c 89 44 24 28 44 88 4c 24 27 48 89 54 24 50 48 89 44 24 40 48 c7 80 f8 00 00 00 00 00 <00> 00 4c 89 90 00 01 00 00 8b 0d b8 68 23 01 4c 8d 90 f0 00 00 00 RSP: 002b:00007f3cb7822c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458099 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000002025c000 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f3cb78236d4 R13: 00000000004c46c5 R14: 00000000004d7cc8 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1040: #0: 00000000af272875 (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389 3 locks held by rsyslogd/7475: #0: 00000000a43d4069 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795 #1: 00000000e4e8e5be (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1149 [inline] #1: 00000000e4e8e5be (&rq->lock){-.-.}, at: __schedule+0x21e/0x1e60 kernel/sched/core.c:3423 #2: 00000000af272875 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #2: 00000000af272875 (rcu_read_lock){....}, at: update_curr+0x362/0xbc0 kernel/sched/fair.c:829 2 locks held by getty/7566: #0: 00000000f5c79615 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000003dde4b65 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7567: #0: 000000009595c2b7 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000ca444790 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7568: #0: 000000000a1babab (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000cfde8ead (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7569: #0: 0000000045096572 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000000d850512 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7570: #0: 000000006eb2cf7b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000b1cf912e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7571: #0: 00000000a021a252 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000008ce1b9a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 2 locks held by getty/7572: #0: 000000009c498271 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000d5b2d05e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154 1 lock held by syz-executor4/17714: #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by syz-executor0/17718: #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by syz-executor5/17722: #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by syz-executor1/19280: #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by udevd/19840: #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by udevd/20129: #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 1 lock held by syz-executor1/20266: #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline] #0: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8860 kernel/fork.c:1917 5 locks held by syz-executor3/22507: #0: 00000000f89340ba (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x9c3/0x2f00 kernel/events/core.c:10511 #1: 00000000abbfcbde (&pmus_srcu){....}, at: perf_event_alloc.part.0+0x10c1/0x3520 kernel/events/core.c:10070 #2: 000000002286a9e3 (event_mutex){+.+.}, at: perf_uprobe_init+0x1d0/0x290 kernel/trace/trace_event_perf.c:328 #3: 000000000e105c23 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register kernel/events/uprobes.c:1140 [inline] #3: 000000000e105c23 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register+0x465/0x8e0 kernel/events/uprobes.c:1112 #4: 00000000ce588fc6 (&dup_mmap_sem){++++}, at: percpu_down_write+0x9a/0x540 kernel/locking/percpu-rwsem.c:145 3 locks held by syz-executor2/22518: #0: 00000000bc503d73 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x9c3/0x2f00 kernel/events/core.c:10511 #1: 00000000abbfcbde (&pmus_srcu){....}, at: perf_event_alloc.part.0+0x10c1/0x3520 kernel/events/core.c:10070 #2: 000000002286a9e3 (event_mutex){+.+.}, at: perf_trace_init+0x58/0x250 kernel/trace/trace_event_perf.c:218 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc4 #49 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:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x2/0x10 arch/x86/include/asm/irqflags.h:57