rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10509 ticks this GP) idle=79f/1/0x4000000000000000 softirq=15112/15113 fqs=5147
(t=10500 jiffies g=17561 q=1848)
NMI backtrace for cpu 0
CPU: 0 PID: 6420 Comm: syz-executor.2 Not tainted 5.16.0-rc5-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+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
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:343
print_cpu_stall kernel/rcu/tree_stall.h:627 [inline]
check_cpu_stall kernel/rcu/tree_stall.h:711 [inline]
rcu_pending kernel/rcu/tree.c:3878 [inline]
rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597
update_process_times+0x16d/0x200 kernel/time/timer.c:1785
tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226
tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1428
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:71 [inline]
RIP: 0010:atomic64_read include/linux/atomic/atomic-instrumented.h:605 [inline]
RIP: 0010:perf_event_count kernel/events/core.c:4414 [inline]
RIP: 0010:perf_output_read_group kernel/events/core.c:6924 [inline]
RIP: 0010:perf_output_read+0xc52/0x1310 kernel/events/core.c:6961
Code: 48 89 e8 48 c1 e8 03 42 80 3c 28 00 0f 85 60 04 00 00 48 8b 44 24 10 be 08 00 00 00 4c 8d a0 b8 00 00 00 48 8b a8 b0 00 00 00 <4c> 89 e7 e8 f6 13 28 00 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 0f 85
RSP: 0018:ffffc90005077118 EFLAGS: 00000246
RAX: ffff88802f9d05e0 RBX: ffffc90005077460 RCX: ffffffff819665f8
RDX: ffffed1005f3a0d3 RSI: 0000000000000008 RDI: ffff88802f9d0690
RBP: 00000037122adad3 R08: 0000000000000000 R09: ffff88802f9d0697
R10: ffffed1005f3a0d2 R11: 0000000000000001 R12: ffff88802f9d0698
R13: dffffc0000000000 R14: ffff88802f9d05e0 R15: 0000000000000010
perf_output_sample+0xd12/0x1d80 kernel/events/core.c:7008
__perf_event_output kernel/events/core.c:7493 [inline]
perf_event_output_forward+0x119/0x280 kernel/events/core.c:7507
__perf_event_overflow+0x13c/0x3d0 kernel/events/core.c:9207
perf_swevent_overflow kernel/events/core.c:9283 [inline]
perf_swevent_event+0x347/0x550 kernel/events/core.c:9311
do_perf_sw_event kernel/events/core.c:9424 [inline]
___perf_sw_event+0x31a/0x570 kernel/events/core.c:9455
__perf_sw_event+0x54/0x130 kernel/events/core.c:9467
perf_sw_event include/linux/perf_event.h:1174 [inline]
mm_account_fault mm/memory.c:4747 [inline]
handle_mm_fault+0x5ef/0x790 mm/memory.c:4798
do_user_addr_fault+0x489/0x11c0 arch/x86/mm/fault.c:1397
handle_page_fault arch/x86/mm/fault.c:1485 [inline]
exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541
asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568
RIP: 0010:copy_user_generic_string+0x2c/0x40 arch/x86/lib/copy_user_64.S:169
Code: cb 83 fa 08 72 27 89 f9 83 e1 07 74 15 83 e9 08 f7 d9 29 ca 8a 06 88 07 48 ff c6 48 ff c7 ff c9 75 f2 89 d1 c1 e9 03 83 e2 07 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 0f 1f 80 00 00 00 00 0f 01
RSP: 0018:ffffc900050779b8 EFLAGS: 00050246
RAX: 0000000000000001 RBX: 0000000000008000 RCX: 00000000000003fa
RDX: 0000000000000000 RSI: 0000000020e4affb RDI: ffff88802e6a6030
RBP: ffff88802e6a0000 R08: 0000000000000001 R09: ffff88802e6a7fff
R10: ffffed1005cd4fff R11: 0000000000000000 R12: 0000000020e44fcb
R13: 0000000020e4cfcb R14: 0000000000000000 R15: ffffc90005077d70
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:168
copyin lib/iov_iter.c:767 [inline]
_copy_from_iter+0x2a3/0x1320 lib/iov_iter.c:767
copy_from_iter include/linux/uio.h:164 [inline]
copy_from_iter_full include/linux/uio.h:170 [inline]
skb_do_copy_data_nocache include/net/sock.h:2158 [inline]
skb_copy_to_page_nocache include/net/sock.h:2184 [inline]
tcp_sendmsg_locked+0x12eb/0x3040 net/ipv4/tcp.c:1334
tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1440
inet_sendmsg+0x99/0xe0 net/ipv4/af_inet.c:819
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
__sys_sendto+0x21c/0x320 net/socket.c:2036
__do_sys_sendto net/socket.c:2048 [inline]
__se_sys_sendto net/socket.c:2044 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2044
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f31548e3e99
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:00007f3153259168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f31549f6f60 RCX: 00007f31548e3e99
RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000013
RBP: 00007f315493dff1 R08: 0000000000000000 R09: 0000000000000053
R10: 0000000000037d68 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffddc77068f R14: 00007f3153259300 R15: 0000000000022000
----------------
Code disassembly (best guess):
0: 48 89 e8 mov %rbp,%rax
3: 48 c1 e8 03 shr $0x3,%rax
7: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
c: 0f 85 60 04 00 00 jne 0x472
12: 48 8b 44 24 10 mov 0x10(%rsp),%rax
17: be 08 00 00 00 mov $0x8,%esi
1c: 4c 8d a0 b8 00 00 00 lea 0xb8(%rax),%r12
23: 48 8b a8 b0 00 00 00 mov 0xb0(%rax),%rbp
* 2a: 4c 89 e7 mov %r12,%rdi <-- trapping instruction
2d: e8 f6 13 28 00 callq 0x281428
32: 4c 89 e0 mov %r12,%rax
35: 48 c1 e8 03 shr $0x3,%rax
39: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1)
3e: 0f .byte 0xf
3f: 85 .byte 0x85