rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=dc2/1/0x4000000000000000 softirq=10938/10939 fqs=5249
(t=10502 jiffies g=13761 q=1429)
NMI backtrace for cpu 0
CPU: 0 PID: 8866 Comm: syz-executor.1 Not tainted 5.8.0-next-20200810-syzkaller #0
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+0x18f/0x20d lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62
trigger_single_cpu_backtrace include/linux/nmi.h:165 [inline]
rcu_dump_cpu_stacks+0x194/0x1cf kernel/rcu/tree_stall.h:318
print_cpu_stall kernel/rcu/tree_stall.h:551 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:625 [inline]
rcu_pending kernel/rcu/tree.c:3637 [inline]
rcu_sched_clock_irq.cold+0x5b3/0xccd kernel/rcu/tree.c:2519
update_process_times+0x25/0xa0 kernel/time/timer.c:1710
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:176
tick_sched_timer+0x1d1/0x2a0 kernel/time/tick-sched.c:1328
__run_hrtimer kernel/time/hrtimer.c:1520 [inline]
__hrtimer_run_queues+0x1d5/0xfc0 kernel/time/hrtimer.c:1584
hrtimer_interrupt+0x32a/0x930 kernel/time/hrtimer.c:1646
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1079 [inline]
__sysvec_apic_timer_interrupt+0x142/0x5e0 arch/x86/kernel/apic/apic.c:1096
asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706
__run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline]
run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline]
sysvec_apic_timer_interrupt+0xb2/0xf0 arch/x86/kernel/apic/apic.c:1090
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:90 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:134 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline]
RIP: 0010:check_memory_region_inline mm/kasan/generic.c:183 [inline]
RIP: 0010:check_memory_region+0xcd/0x180 mm/kasan/generic.c:192
Code: 8d 50 08 eb 09 48 83 c0 01 48 39 d0 74 7a 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e <48> 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 80 38 00 74 f2 eb d4 41
RSP: 0018:ffffc90008e96f78 EFLAGS: 00000202
RAX: ffffed1014d27616 RBX: ffffed1014d27617 RCX: ffffffff818e9c96
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff8880a693b0b0
RBP: ffffed1014d27616 R08: 0000000000000000 R09: ffff8880a693b0b7
R10: ffffed1014d27616 R11: 0000000000000001 R12: ffffc90008e970e0
R13: dffffc0000000000 R14: ffff8880a693b000 R15: 0000000000000010
instrument_atomic_read include/linux/instrumented.h:56 [inline]
atomic64_read include/asm-generic/atomic-instrumented.h:837 [inline]
atomic_long_read include/asm-generic/atomic-long.h:29 [inline]
perf_event_count kernel/events/core.c:4247 [inline]
perf_output_read_group kernel/events/core.c:6711 [inline]
perf_output_read+0xbe6/0x1260 kernel/events/core.c:6748
perf_output_sample+0x102c/0x1c60 kernel/events/core.c:6795
__perf_event_output kernel/events/core.c:7176 [inline]
perf_event_output_forward+0x12f/0x270 kernel/events/core.c:7190
__perf_event_overflow+0x13c/0x370 kernel/events/core.c:8845
perf_swevent_overflow kernel/events/core.c:8921 [inline]
perf_swevent_event+0x347/0x550 kernel/events/core.c:8949
do_perf_sw_event kernel/events/core.c:9062 [inline]
___perf_sw_event+0x304/0x550 kernel/events/core.c:9093
__perf_sw_event+0x58/0x120 kernel/events/core.c:9105
perf_sw_event include/linux/perf_event.h:1159 [inline]
mm_account_fault mm/memory.c:4425 [inline]
handle_mm_fault+0x1219/0x45e0 mm/memory.c:4476
do_user_addr_fault+0x598/0xbf0 arch/x86/mm/fault.c:1294
handle_page_fault arch/x86/mm/fault.c:1351 [inline]
exc_page_fault+0xa8/0x160 arch/x86/mm/fault.c:1404
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:538
RIP: 0010:copy_user_enhanced_fast_string+0xe/0x30 arch/x86/lib/copy_user_64.S:205
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 f3 a4
RSP: 0018:ffffc90008e979c0 EFLAGS: 00010206
RAX: 0000000000000001 RBX: 0000000000008000 RCX: 0000000000004fcb
RDX: 0000000000008000 RSI: 0000000020fe0000 RDI: ffff88805d333035
RBP: ffff88805d330000 R08: 0000000000000001 R09: ffff88805d337fff
R10: ffffed100ba66fff R11: 0000000000000000 R12: 0000000020fdcfcb
R13: 0000000020fe4fcb R14: 00007ffffffff000 R15: 0000000000000000
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+0x107/0x140 lib/iov_iter.c:153
_copy_from_iter_full+0x1ff/0x890 lib/iov_iter.c:794
copy_from_iter_full include/linux/uio.h:155 [inline]
skb_do_copy_data_nocache+0x145/0x2c0 include/net/sock.h:2038
skb_copy_to_page_nocache include/net/sock.h:2064 [inline]
tcp_sendmsg_locked+0x112c/0x2d00 net/ipv4/tcp.c:1343
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1441
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:817
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:671
__sys_sendto+0x21c/0x320 net/socket.c:1992
__do_sys_sendto net/socket.c:2004 [inline]
__se_sys_sendto net/socket.c:2000 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2000
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45ce69
Code: 2d b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f012c44ac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 000000000002c380 RCX: 000000000045ce69
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000007
RBP: 000000000118bf78 R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007fff378bb51f R14: 00007f012c44b9c0 R15: 000000000118bf2c