INFO: rcu_preempt self-detected stall on CPU
	0-...: (10499 ticks this GP) idle=03a/140000000000001/0 softirq=75431/75433 fqs=5223 
	 (t=10500 jiffies g=21449 c=21448 q=1383)
NMI backtrace for cpu 0
CPU: 0 PID: 29582 Comm: syz-executor.0 Not tainted 4.14.198-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+0x28/0xa0 kernel/time/timer.c:1591
 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:__sanitizer_cov_trace_pc+0x3d/0x50 kernel/kcov.c:87
RSP: 0018:ffff888084dcf288 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90005b68000
RDX: 000000000003ffff RSI: ffffffff8169f0a5 RDI: ffff8880a60437c0
RBP: ffff888084dcf370 R08: 0000000000000001 R09: ffffed1014c086f7
R10: ffff8880a60437bf R11: 000000946b4c452d R12: dffffc0000000000
R13: ffffed10109b9eaa R14: ffff888084dcf528 R15: 0000000000000010
 __output_copy kernel/events/internal.h:176 [inline]
 perf_output_read_group kernel/events/core.c:5895 [inline]
 perf_output_read+0x795/0x1090 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:ffff888084dcfa78 EFLAGS: 00010206
RAX: ffffed100c4d0000 RBX: 0000000000008000 RCX: 0000000000000acb
RDX: 0000000000008000 RSI: 0000000020fdd000 RDI: ffff88806267f535
RBP: 0000000020fd5acb R08: 0000000000000001 R09: ffffed100c4cffff
R10: ffff88806267ffff R11: 0000000000000000 R12: ffff888062678000
R13: 00007ffffffff000 R14: 0000000020fddacb R15: ffff888062678000
 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+0x197/0x690 lib/iov_iter.c:608
 copy_from_iter_full include/linux/uio.h:126 [inline]
 skb_do_copy_data_nocache include/net/sock.h:1889 [inline]
 skb_copy_to_page_nocache include/net/sock.h:1915 [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: 0033:0x45dd99
RSP: 002b:00007f417ee36c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000002e880 RCX: 000000000045dd99
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000004
RBP: 000000000118bf78 R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffee37df4ff R14: 00007f417ee379c0 R15: 000000000118bf2c
INFO: rcu_sched self-detected stall on CPU
INFO: rcu_sched detected stalls on CPUs/tasks:
	0-...: (10470 ticks this GP) idle=03a/140000000000001/0 softirq=75433/75433 fqs=5210 
	
	0-...: (10470 ticks this GP) idle=03a/140000000000001/0 softirq=75433/75433 fqs=5210 
 (t=10523 jiffies g=9875 c=9874 q=38)
	
NMI backtrace for cpu 0
(detected by 1, t=10523 jiffies, g=9875, c=9874, q=38)
CPU: 0 PID: 29582 Comm: syz-executor.0 Not tainted 4.14.198-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+0x28/0xa0 kernel/time/timer.c:1591
 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:__sanitizer_cov_trace_pc+0x3d/0x50 kernel/kcov.c:87
RSP: 0018:ffff888084dcf288 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10
RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90005b68000
RDX: 000000000003ffff RSI: ffffffff8169f0a5 RDI: ffff8880a60437c0
RBP: ffff888084dcf370 R08: 0000000000000001 R09: ffffed1014c086f7
R10: ffff8880a60437bf R11: 000000946b4c452d R12: dffffc0000000000
R13: ffffed10109b9eaa R14: ffff888084dcf528 R15: 0000000000000010
 __output_copy kernel/events/internal.h:176 [inline]
 perf_output_read_group kernel/events/core.c:5895 [inline]
 perf_output_read+0x795/0x1090 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:ffff888084dcfa78 EFLAGS: 00010206
RAX: ffffed100c4d0000 RBX: 0000000000008000 RCX: 0000000000000acb
RDX: 0000000000008000 RSI: 0000000020fdd000 RDI: ffff88806267f535
RBP: 0000000020fd5acb R08: 0000000000000001 R09: ffffed100c4cffff
R10: ffff88806267ffff R11: 0000000000000000 R12: ffff888062678000
R13: 00007ffffffff000 R14: 0000000020fddacb R15: ffff888062678000
 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+0x197/0x690 lib/iov_iter.c:608
 copy_from_iter_full include/linux/uio.h:126 [inline]
 skb_do_copy_data_nocache include/net/sock.h:1889 [inline]
 skb_copy_to_page_nocache include/net/sock.h:1915 [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: 0033:0x45dd99
RSP: 002b:00007f417ee36c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000002e880 RCX: 000000000045dd99
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000004
RBP: 000000000118bf78 R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffee37df4ff R14: 00007f417ee379c0 R15: 000000000118bf2c
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 29582 Comm: syz-executor.0 Not tainted 4.14.198-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff888057e58140 task.stack: ffff888084dc8000
RIP: 0010:kvm_clock_read+0x26/0x30 arch/x86/kernel/kvmclock.c:89
RSP: 0018:ffff888084dcf220 EFLAGS: 00000202
RAX: 00000094ad1401b8 RBX: ffff8880914c3100 RCX: 0000000000000001
RDX: 000000000000000a RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff888084dcf370 R08: ffff88821fff7018 R09: ffff88821fff700f
R10: ffff88821fff7017 R11: 00000094ad1401b8 R12: dffffc0000000000
R13: ffffed10109b9eaa R14: ffff888084dcf528 R15: 0000000000000010
FS:  00007f417ee37700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000053 CR3: 00000000a0faa000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 kvm_sched_clock_read+0x5/0x10 arch/x86/kernel/kvmclock.c:100
 paravirt_sched_clock arch/x86/include/asm/paravirt.h:175 [inline]
 sched_clock+0x2a/0x40 arch/x86/kernel/tsc.c:228
 sched_clock_cpu+0x18/0x1b0 kernel/sched/clock.c:363
 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:ffff888084dcfa78 EFLAGS: 00010206
RAX: ffffed100c4d0000 RBX: 0000000000008000 RCX: 0000000000000acb
RDX: 0000000000008000 RSI: 0000000020fdd000 RDI: ffff88806267f535
RBP: 0000000020fd5acb R08: 0000000000000001 R09: ffffed100c4cffff
R10: ffff88806267ffff R11: 0000000000000000 R12: ffff888062678000
R13: 00007ffffffff000 R14: 0000000020fddacb R15: ffff888062678000
 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+0x197/0x690 lib/iov_iter.c:608
 copy_from_iter_full include/linux/uio.h:126 [inline]
 skb_do_copy_data_nocache include/net/sock.h:1889 [inline]
 skb_copy_to_page_nocache include/net/sock.h:1915 [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: 0033:0x45dd99
RSP: 002b:00007f417ee36c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000002e880 RCX: 000000000045dd99
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000004
RBP: 000000000118bf78 R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffee37df4ff R14: 00007f417ee379c0 R15: 000000000118bf2c
Code: 00 00 00 00 00 65 ff 05 f9 fc d9 7e e8 54 b1 dd 01 48 63 f8 48 c1 e7 06 48 03 3d 76 c3 74 08 e8 81 12 00 00 65 ff 0d da fc d9 7e <74> 01 c3 e8 35 4c d8 ff c3 90 eb ce 0f 1f 40 00 66 2e 0f 1f 84