rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=996/1/0x4000000000000000 softirq=11814/11815 fqs=5235
(t=10502 jiffies g=14133 q=3661)
NMI backtrace for cpu 0
CPU: 0 PID: 10288 Comm: syz-executor.2 Not tainted 5.13.0-rc2-next-20210518-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x13e/0x1d6 lib/dump_stack.c:129
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline]
rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:342
print_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:700 [inline]
rcu_pending kernel/rcu/tree.c:3922 [inline]
rcu_sched_clock_irq.cold+0x3f1/0x74b kernel/rcu/tree.c:2641
update_process_times+0x16d/0x200 kernel/time/timer.c:1782
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1420
__run_hrtimer kernel/time/hrtimer.c:1537 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1601
hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1106
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:pvclock_scale_delta arch/x86/include/asm/pvclock.h:68 [inline]
RIP: 0010:__pvclock_read_cycles arch/x86/include/asm/pvclock.h:85 [inline]
RIP: 0010:pvclock_clocksource_read+0x1a6/0x530 arch/x86/kernel/pvclock.c:76
Code: 84 ff 40 0f 95 c7 40 84 fe 0f 85 1a 03 00 00 85 d2 44 8b 5b 18 0f 88 54 01 00 00 80 f9 3f 0f 8f 5d b6 a8 07 48 d3 e0 49 f7 e3 <48> 0f ac d0 20 4c 89 fa 4c 89 fe 4c 89 d1 48 c1 ea 03 83 e6 07 48
RSP: 0018:ffffc900028d6f40 EFLAGS: 00000a87
RAX: e88ca6ffdd0f45c0 RBX: ffffffff8f639000 RCX: 0000000000000001
RDX: 0000000000000033 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff8f639018 R09: ffffffff8f63900f
R10: ffffffff8f639017 R11: 00000000de9bd9d2 R12: ffffffff8f639003
R13: fffffbfff1ec7201 R14: ffffffff8f63901d R15: ffffffff8f639010
kvm_clock_read arch/x86/kernel/kvmclock.c:88 [inline]
kvm_sched_clock_read+0x14/0x40 arch/x86/kernel/kvmclock.c:100
sched_clock_cpu+0x15/0x1f0 kernel/sched/clock.c:371
local_clock include/linux/sched/clock.h:84 [inline]
perf_clock kernel/events/core.c:586 [inline]
task_clock_event_read+0x1e/0x110 kernel/events/core.c:10718
perf_output_read_group kernel/events/core.c:6873 [inline]
perf_output_read+0xf02/0x1310 kernel/events/core.c:6912
perf_output_sample+0xd12/0x1be0 kernel/events/core.c:6959
__perf_event_output kernel/events/core.c:7444 [inline]
perf_event_output_forward+0x119/0x280 kernel/events/core.c:7458
__perf_event_overflow+0x13c/0x3d0 kernel/events/core.c:9131
perf_swevent_overflow kernel/events/core.c:9207 [inline]
perf_swevent_event+0x347/0x550 kernel/events/core.c:9235
do_perf_sw_event kernel/events/core.c:9348 [inline]
___perf_sw_event+0x31a/0x570 kernel/events/core.c:9379
__perf_sw_event+0x54/0x130 kernel/events/core.c:9391
perf_sw_event include/linux/perf_event.h:1170 [inline]
mm_account_fault mm/memory.c:4573 [inline]
handle_mm_fault+0x5d7/0x7e0 mm/memory.c:4624
do_user_addr_fault+0x483/0x1210 arch/x86/mm/fault.c:1390
handle_page_fault arch/x86/mm/fault.c:1475 [inline]
exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1531
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:577
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:206
Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 1f 00 c3 0f 1f 80 00 00 00 00 0f 1f 00 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 1f 00 c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 83 f8
RSP: 0018:ffffc900028d78f8 EFLAGS: 00010206
RAX: 0000000000000001 RBX: 0000000000008000 RCX: 0000000000007fcb
RDX: 0000000000008000 RSI: 0000000020e7d000 RDI: ffff888069270035
RBP: ffff888069270000 R08: 0000000000000001 R09: ffff888069277fff
R10: ffffed100d24efff R11: 0000000000000000 R12: 0000000020e7cfcb
R13: 0000000020e84fcb R14: 0000000000000000 R15: 0000000000008000
copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline]
copyin.part.0+0xe4/0x110 lib/iov_iter.c:201
copyin lib/iov_iter.c:834 [inline]
_copy_from_iter_full+0x299/0x11c0 lib/iov_iter.c:834
copy_from_iter_full include/linux/uio.h:163 [inline]
skb_do_copy_data_nocache+0x145/0x2c0 include/net/sock.h:2077
skb_copy_to_page_nocache include/net/sock.h:2103 [inline]
tcp_sendmsg_locked+0x1360/0x2e60 net/ipv4/tcp.c:1361
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1458
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:821
sock_sendmsg_nosec net/socket.c:654 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:674
__sys_sendto+0x21c/0x320 net/socket.c:1977
__do_sys_sendto net/socket.c:1989 [inline]
__se_sys_sendto net/socket.c:1985 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:1985
do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8b275bd188 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000006
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffd8acfeddf R14: 00007f8b275bd300 R15: 0000000000022000