INFO: task syz-executor4:32471 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc2+ #31
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor4   D20440 32471      1 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
 rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:297
 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+0x3041/0x8710 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:00007ffd581e7380 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffd581e7380 RCX: 000000000045666a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffd581e73c0 R08: 0000000000000001 R09: 0000000001f0c940
R10: 0000000001f0cc10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000004
INFO: task syz-executor0:6010 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc2+ #31
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D20328  6010      1 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
 rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:297
 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+0x3041/0x8710 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:00007fff453b9bf0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fff453b9bf0 RCX: 000000000045666a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fff453b9c30 R08: 0000000000000001 R09: 000000000115c940
R10: 000000000115cc10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor3:9052 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc2+ #31
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor3   D20328  9052      1 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
 rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:297
 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+0x3041/0x8710 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:00007ffc9969f7c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffc9969f7c0 RCX: 000000000045666a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffc9969f800 R08: 0000000000000001 R09: 0000000001044940
R10: 0000000001044c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000003
INFO: task syz-executor2:9067 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc2+ #31
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor2   D20328  9067      1 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
 rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:297
 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+0x3041/0x8710 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:00007ffd5c8ddaa0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffd5c8ddaa0 RCX: 000000000045666a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffd5c8ddae0 R08: 0000000000000001 R09: 0000000001ce7940
R10: 0000000001ce7c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000002
INFO: task udevd:12650 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc2+ #31
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd           D24104 12650   3866 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
 rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:297
 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+0x3041/0x8710 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: 0033:0x7f2647c5ef46
Code: Bad RIP value.
RSP: 002b:00007fff58fefe60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fff58fefe60 RCX: 00007f2647c5ef46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fff58fefec0 R08: 000000000000316a R09: 000000000000316a
R10: 00007f264857ba70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff58fefe80 R14: 0000000000000005 R15: 0000000000000005
INFO: task syz-executor5:12821 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc2+ #31
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor5   D21160 12821      1 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
 rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:297
 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+0x3041/0x8710 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:00007ffe9ed7b910 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe9ed7b910 RCX: 000000000045666a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffe9ed7b950 R08: 0000000000000001 R09: 0000000001f2a940
R10: 0000000001f2ac10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005
INFO: task udevd:12927 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc2+ #31
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd           D24200 12927   3866 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
 rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:297
 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+0x3041/0x8710 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: 0033:0x7f2647c5ef46
Code: Bad RIP value.
RSP: 002b:00007fff58fefe60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fff58fefe60 RCX: 00007f2647c5ef46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fff58fefec0 R08: 000000000000327f R09: 000000000000327f
R10: 00007f264857ba70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff58fefe80 R14: 0000000000000005 R15: 0000000000000005
INFO: task udevd:13042 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc2+ #31
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
udevd           D25688 13042   3866 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
 rwsem_down_read_failed+0x360/0x6d0 kernel/locking/rwsem-xadd.c:297
 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+0x3041/0x8710 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: 0033:0x7f2647c5ef46
Code: Bad RIP value.
RSP: 002b:00007fff58fefe60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fff58fefe60 RCX: 00007f2647c5ef46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007fff58fefec0 R08: 00000000000032f2 R09: 00000000000032f2
R10: 00007f264857ba70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff58fefe80 R14: 0000000000000005 R15: 0000000000000005
INFO: task syz-executor1:14593 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc2+ #31
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor1   D24760 14593   9051 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
 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+0x28/0x30 kernel/events/uprobes.c:1159
 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+0x137/0x2f0 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: Bad RIP value.
RSP: 002b:00007f9b0331ec78 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: 00007f9b0331f6d4
R13: 00000000004c464d R14: 00000000004d7b58 R15: 00000000ffffffff

Showing all locks held in the system:
1 lock held by khungtaskd/1040:
 #0: 00000000b84adf46 (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389
1 lock held by rsyslogd/7950:
 #0: 000000001c6a6f3d (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795
2 locks held by getty/8062:
 #0: 000000008044d86a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000004b0de1cf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/8063:
 #0: 0000000043d05f88 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000e329bd5d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/8064:
 #0: 0000000060e90388 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000000e946fce (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/8065:
 #0: 00000000488b8385 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000a1763c78 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/8066:
 #0: 0000000063e2f3fc (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000035d4838 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/8067:
 #0: 00000000d4322699 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000b6e18611 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/8068:
 #0: 000000003b03c5a3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000dd62962a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
1 lock held by syz-executor4/32471:
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8710 kernel/fork.c:1917
1 lock held by syz-executor0/6010:
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8710 kernel/fork.c:1917
1 lock held by syz-executor3/9052:
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8710 kernel/fork.c:1917
1 lock held by syz-executor2/9067:
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8710 kernel/fork.c:1917
1 lock held by syz-executor0/10054:
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8710 kernel/fork.c:1917
1 lock held by udevd/12650:
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8710 kernel/fork.c:1917
1 lock held by syz-executor5/12821:
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8710 kernel/fork.c:1917
1 lock held by udevd/12927:
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8710 kernel/fork.c:1917
1 lock held by udevd/13042:
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mmap kernel/fork.c:472 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: dup_mm kernel/fork.c:1320 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_mm kernel/fork.c:1375 [inline]
 #0: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: copy_process+0x3041/0x8710 kernel/fork.c:1917
5 locks held by syz-executor1/14593:
 #0: 00000000de8e5a77 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x9c3/0x2f00 kernel/events/core.c:10511
 #1: 00000000204a2926 (&pmus_srcu){....}, at: perf_event_alloc.part.0+0x10c1/0x3520 kernel/events/core.c:10070
 #2: 00000000e9593376 (event_mutex){+.+.}, at: perf_uprobe_init+0x1d0/0x290 kernel/trace/trace_event_perf.c:328
 #3: 0000000092686229 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register kernel/events/uprobes.c:1140 [inline]
 #3: 0000000092686229 (&uprobe->register_rwsem){+.+.}, at: __uprobe_register+0x465/0x8e0 kernel/events/uprobes.c:1112
 #4: 00000000fef11aa2 (&dup_mmap_sem){++++}, at: percpu_down_write+0x9a/0x540 kernel/locking/percpu-rwsem.c:145

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc2+ #31
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 32148 Comm: kworker/u4:1 Not tainted 5.0.0-rc2+ #31
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:kasan_check_read+0x0/0x20 mm/kasan/common.c:99
Code: ef e9 14 eb ff ff 48 8b 73 58 89 c2 48 c7 c7 b0 a5 3c 89 f7 da e8 b4 76 a2 ff e9 c4 f5 ff ff 90 90 90 90 90 90 90 90 90 90 90 <55> 89 f6 31 d2 48 89 e5 48 8b 4d 08 e8 ff 23 00 00 5d c3 0f 1f 00
RSP: 0018:ffff8880634176f0 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 1ffff1100c682ee0 RCX: ffffffff8390f09a
RDX: 1ffffffff12ac80c RSI: 0000000000000004 RDI: ffff8880ae62dc78
RBP: ffff888063417780 R08: ffff88808b5e6580 R09: ffff88808b5e6e70
R10: ffff88808b5e6e50 R11: 0000000000000001 R12: ffff8880ae62dbc0
R13: ffff888063417760 R14: ffff8880ae62dc78 R15: ffff888060d1d740
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 0000000093a21000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:932
 rcu_read_lock include/linux/rcupdate.h:608 [inline]
 batadv_nc_process_nc_paths.part.0+0x40e/0x540 net/batman-adv/network-coding.c:698
 batadv_nc_process_nc_paths net/batman-adv/network-coding.c:690 [inline]
 batadv_nc_worker+0x6c3/0x920 net/batman-adv/network-coding.c:739
 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153
 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352