loop5: p2 < >
ldm_parse_privhead(): Cannot find PRIVHEAD structure. LDM database is corrupt. Aborting.
ldm_validate_privheads(): Cannot find PRIVHEAD 1.
 loop5: p2 < >
NOHZ: local_softirq_pending 08
INFO: rcu_preempt self-detected stall on CPU
	0-...: (10499 ticks this GP) idle=4fe/140000000000001/0 softirq=51101/51101 fqs=5213 
	 (t=10500 jiffies g=14008 c=14007 q=2294)
NMI backtrace for cpu 0
CPU: 0 PID: 22898 Comm: syz-executor.1 Not tainted 4.14.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x13a/0x17f lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline]
 rcu_dump_cpu_stacks+0x15f/0x19c kernel/rcu/tree.c:1396
 print_cpu_stall kernel/rcu/tree.c:1542 [inline]
 check_cpu_stall kernel/rcu/tree.c:1610 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0x464/0xd99 kernel/rcu/tree.c:2792
 update_process_times+0x29/0x60 kernel/time/timer.c:1590
 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
 tick_sched_timer+0x92/0x200 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x30b/0xc80 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
 </IRQ>
RIP: 0010:__output_copy kernel/events/internal.h:176 [inline]
RIP: 0010:perf_output_read_group kernel/events/core.c:5895 [inline]
RIP: 0010:perf_output_read+0x6e2/0x1090 kernel/events/core.c:5928
RSP: 0018:ffff888064acf290 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: ffffed100c959ea8 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000010 RSI: ffff888064acf370 RDI: ffff888090d1dcc8
RBP: ffff888064acf370 R08: 0000000000000001 R09: ffffed10121a3b98
R10: ffff888090d1dcc7 R11: 0000007037f4da9c R12: dffffc0000000000
R13: ffffed100c959eaa R14: ffff888064acf528 R15: 0000000000000010
 perf_output_sample+0xa28/0x16f0 kernel/events/core.c:5970
 __perf_event_output kernel/events/core.c:6283 [inline]
 perf_event_output_forward+0xf8/0x1f0 kernel/events/core.c:6296
 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7541
 perf_swevent_overflow kernel/events/core.c:7617 [inline]
 perf_swevent_event+0x299/0x460 kernel/events/core.c:7645
 do_perf_sw_event kernel/events/core.c:7758 [inline]
 ___perf_sw_event+0x2a1/0x480 kernel/events/core.c:7789
 __perf_sw_event+0x4f/0x100 kernel/events/core.c:7801
 perf_sw_event include/linux/perf_event.h:1046 [inline]
 __do_page_fault+0x6c1/0xb50 arch/x86/mm/fault.c:1483
 page_fault+0x25/0x50 arch/x86/entry/entry_64.S:1123
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:181
RSP: 0018:ffff888064acfa78 EFLAGS: 00010206
RAX: ffffed100c35a000 RBX: 0000000000008000 RCX: 0000000000003acb
RDX: 0000000000008000 RSI: 0000000020ffa000 RDI: ffff888061acc535
RBP: 0000000020ff5acb R08: 0000000000000001 R09: ffffed100c359fff
R10: ffff888061acffff R11: 0000000000000000 R12: ffff888061ac8000
R13: 00007ffffffff000 R14: 0000000020ffdacb R15: ffff888061ac8000
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline]
 copyin+0x99/0xc0 lib/iov_iter.c:146
 _copy_from_iter_full+0x195/0x690 lib/iov_iter.c:608
 copy_from_iter_full include/linux/uio.h:126 [inline]
 skb_do_copy_data_nocache include/net/sock.h:1885 [inline]
 skb_copy_to_page_nocache include/net/sock.h:1911 [inline]
 tcp_sendmsg_locked+0x23fc/0x2ef0 net/ipv4/tcp.c:1360
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457
 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 SYSC_sendto net/socket.c:1763 [inline]
 SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45c369
RSP: 002b:00007fc719dfec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000002ba00 RCX: 000000000045c369
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000006
RBP: 000000000078bf58 R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffd110d746f R14: 00007fc719dff9c0 R15: 000000000078bf0c
INFO: rcu_sched self-detected stall on CPU
	0-...: (1 GPs behind) idle=4fe/140000000000001/0 softirq=51077/51101 fqs=5195 
	 (t=10500 jiffies g=6564 c=6563 q=40)
NMI backtrace for cpu 0
CPU: 0 PID: 22898 Comm: syz-executor.1 Not tainted 4.14.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 nmi_cpu_backtrace.cold+0x57/0x93 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x13a/0x17f lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:158 [inline]
 rcu_dump_cpu_stacks+0x15f/0x19c kernel/rcu/tree.c:1396
 print_cpu_stall kernel/rcu/tree.c:1542 [inline]
 check_cpu_stall kernel/rcu/tree.c:1610 [inline]
 __rcu_pending kernel/rcu/tree.c:3390 [inline]
 rcu_pending kernel/rcu/tree.c:3452 [inline]
 rcu_check_callbacks.cold+0x464/0xd99 kernel/rcu/tree.c:2792
 update_process_times+0x29/0x60 kernel/time/timer.c:1590
 tick_sched_handle+0x7d/0x150 kernel/time/tick-sched.c:165
 tick_sched_timer+0x92/0x200 kernel/time/tick-sched.c:1223
 __run_hrtimer kernel/time/hrtimer.c:1223 [inline]
 __hrtimer_run_queues+0x30b/0xc80 kernel/time/hrtimer.c:1287
 hrtimer_interrupt+0x1e6/0x5e0 kernel/time/hrtimer.c:1321
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1075 [inline]
 smp_apic_timer_interrupt+0x117/0x5e0 arch/x86/kernel/apic/apic.c:1100
 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793
 </IRQ>
RIP: 0010:sched_clock_cpu+0x4/0x1b0 kernel/sched/clock.c:358
RSP: 0018:ffff888064acf268 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000040000 RBX: ffff8880692c4500 RCX: ffffc9000647b000
RDX: 0000000000040000 RSI: ffffffff8169e609 RDI: 0000000000000000
RBP: ffff888064acf370 R08: 0000000000000001 R09: ffffed10121a3a6a
R10: ffff888090d1d357 R11: 00000070683c7795 R12: dffffc0000000000
R13: ffffed100c959eaa R14: ffff888064acf528 R15: 0000000000000010
 local_clock include/linux/sched/clock.h:84 [inline]
 cpu_clock_event_update kernel/events/core.c:8828 [inline]
 cpu_clock_event_read+0x15/0x30 kernel/events/core.c:8861
 perf_output_read_group kernel/events/core.c:5889 [inline]
 perf_output_read+0xc28/0x1090 kernel/events/core.c:5928
 perf_output_sample+0xa28/0x16f0 kernel/events/core.c:5970
 __perf_event_output kernel/events/core.c:6283 [inline]
 perf_event_output_forward+0xf8/0x1f0 kernel/events/core.c:6296
 __perf_event_overflow+0x113/0x310 kernel/events/core.c:7541
 perf_swevent_overflow kernel/events/core.c:7617 [inline]
 perf_swevent_event+0x299/0x460 kernel/events/core.c:7645
 do_perf_sw_event kernel/events/core.c:7758 [inline]
 ___perf_sw_event+0x2a1/0x480 kernel/events/core.c:7789
 __perf_sw_event+0x4f/0x100 kernel/events/core.c:7801
 perf_sw_event include/linux/perf_event.h:1046 [inline]
 __do_page_fault+0x6c1/0xb50 arch/x86/mm/fault.c:1483
 page_fault+0x25/0x50 arch/x86/entry/entry_64.S:1123
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x20 arch/x86/lib/copy_user_64.S:181
RSP: 0018:ffff888064acfa78 EFLAGS: 00010206
RAX: ffffed100c35a000 RBX: 0000000000008000 RCX: 0000000000003acb
RDX: 0000000000008000 RSI: 0000000020ffa000 RDI: ffff888061acc535
RBP: 0000000020ff5acb R08: 0000000000000001 R09: ffffed100c359fff
R10: ffff888061acffff R11: 0000000000000000 R12: ffff888061ac8000
R13: 00007ffffffff000 R14: 0000000020ffdacb R15: ffff888061ac8000
 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
 raw_copy_from_user arch/x86/include/asm/uaccess_64.h:55 [inline]
 copyin+0x99/0xc0 lib/iov_iter.c:146
 _copy_from_iter_full+0x195/0x690 lib/iov_iter.c:608
 copy_from_iter_full include/linux/uio.h:126 [inline]
 skb_do_copy_data_nocache include/net/sock.h:1885 [inline]
 skb_copy_to_page_nocache include/net/sock.h:1911 [inline]
 tcp_sendmsg_locked+0x23fc/0x2ef0 net/ipv4/tcp.c:1360
 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457
 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 SYSC_sendto net/socket.c:1763 [inline]
 SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45c369
RSP: 002b:00007fc719dfec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000002ba00 RCX: 000000000045c369
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000006
RBP: 000000000078bf58 R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffd110d746f R14: 00007fc719dff9c0 R15: 000000000078bf0c