rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (7654 ticks this GP) idle=9b3/1/0x4000000000000000 softirq=194347/194347 fqs=5168
(t=10502 jiffies g=318801 q=36197)
NMI backtrace for cpu 0
CPU: 0 PID: 26620 Comm: syz-executor.0 Not tainted 5.15.0-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:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1ae/0x220 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:1421
__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
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:spin_unlock_bh include/linux/spinlock.h:395 [inline]
RIP: 0010:udp_lib_get_port+0x544/0x17e0 net/ipv4/udp.c:339
Code: 12 00 00 49 83 7f 70 00 0f 84 2e 03 00 00 e8 33 c9 c8 f9 49 8d 7f 60 be 08 00 00 00 e8 c5 47 0f fa 49 0f ba 6f 60 17 45 31 e4 <e8> 17 c9 c8 f9 48 8b 7c 24 28 e8 2d d5 8c 01 e8 08 c9 c8 f9 48 b8
RSP: 0018:ffffc9000571f0d8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffff88809dbe9d00 RDI: 0000000000000003
RBP: 0000000000004e22 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff87aefd85 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000004e22 R14: 000000000721d8ca R15: ffff8880addfa000
__inet6_bind+0x61d/0x1aa0 net/ipv6/af_inet6.c:408
inet6_bind+0x173/0x220 net/ipv6/af_inet6.c:462
udp_sock_create6+0x1df/0x690 net/ipv6/ip6_udp_tunnel.c:42
udp_sock_create include/net/udp_tunnel.h:62 [inline]
rxrpc_open_socket+0x1fb/0x590 net/rxrpc/local_object.c:129
rxrpc_lookup_local+0x896/0x1060 net/rxrpc/local_object.c:226
rxrpc_sendmsg+0x369/0x630 net/rxrpc/af_rxrpc.c:542
sock_sendmsg_nosec net/socket.c:704 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:724
____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
__sys_sendmsg_sock+0x26/0x30 net/socket.c:2475
io_sendmsg+0x50b/0x5f0 fs/io_uring.c:4797
io_issue_sqe+0x19a1/0x7010 fs/io_uring.c:6648
__io_queue_sqe fs/io_uring.c:6978 [inline]
io_queue_sqe fs/io_uring.c:7020 [inline]
io_submit_sqe fs/io_uring.c:7223 [inline]
io_submit_sqes+0x1bca/0x8a20 fs/io_uring.c:7329
__do_sys_io_uring_enter+0xf6e/0x1f50 fs/io_uring.c:10043
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: 0033:0x7f51091cdae9
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:00007f5106743188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007f51092e0f60 RCX: 00007f51091cdae9
RDX: 0000000000000000 RSI: 000000000000688c RDI: 0000000000000003
RBP: 00007f5109227f25 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5109814b2f R14: 00007f5106743300 R15: 0000000000022000
</TASK>
----------------
Code disassembly (best guess):
0: 12 00 adc (%rax),%al
2: 00 49 83 add %cl,-0x7d(%rcx)
5: 7f 70 jg 0x77
7: 00 0f add %cl,(%rdi)
9: 84 2e test %ch,(%rsi)
b: 03 00 add (%rax),%eax
d: 00 e8 add %ch,%al
f: 33 c9 xor %ecx,%ecx
11: c8 f9 49 8d enterq $0x49f9,$0x8d
15: 7f 60 jg 0x77
17: be 08 00 00 00 mov $0x8,%esi
1c: e8 c5 47 0f fa callq 0xfa0f47e6
21: 49 0f ba 6f 60 17 btsq $0x17,0x60(%r15)
27: 45 31 e4 xor %r12d,%r12d
* 2a: e8 17 c9 c8 f9 callq 0xf9c8c946 <-- trapping instruction
2f: 48 8b 7c 24 28 mov 0x28(%rsp),%rdi
34: e8 2d d5 8c 01 callq 0x18cd566
39: e8 08 c9 c8 f9 callq 0xf9c8c946
3e: 48 rex.W
3f: b8 .byte 0xb8