rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (2338 ticks this GP) idle=9e5/1/0x4000000000000000 softirq=16995/16995 fqs=2485 
	(t=10500 jiffies g=19413 q=1043)
NMI backtrace for cpu 1
CPU: 1 PID: 7351 Comm: syz.3.979 Not tainted 5.15.162-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
 trigger_single_cpu_backtrace include/linux/nmi.h:166 [inline]
 rcu_dump_cpu_stacks+0x223/0x390 kernel/rcu/tree_stall.h:349
 print_cpu_stall+0x320/0x600 kernel/rcu/tree_stall.h:633
 check_cpu_stall kernel/rcu/tree_stall.h:727 [inline]
 rcu_pending kernel/rcu/tree.c:3932 [inline]
 rcu_sched_clock_irq+0x8d9/0x1150 kernel/rcu/tree.c:2619
 update_process_times+0x196/0x200 kernel/time/timer.c:1818
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1473
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
 __sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
 sysvec_apic_timer_interrupt+0x3e/0xb0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:ffs arch/x86/include/asm/bitops.h:297 [inline]
RIP: 0010:handle_softirqs+0x1d6/0x930 kernel/softirq.c:546
Code: 24 78 4c 89 7c 24 70 0f b7 db 48 c7 c7 e0 10 8a 8a e8 4e 0f d1 08 65 66 c7 05 04 16 b6 7e 00 00 e8 af 58 39 00 fb 89 5c 24 34 <b8> ff ff ff ff 0f bc 44 24 34 41 89 c6 41 ff c6 0f 85 f3 00 00 00
RSP: 0018:ffffc90000dd0e20 EFLAGS: 00000282
RAX: 6f2e5cfaba424b00 RBX: 0000000000000386 RCX: ffffffff81631708
RDX: dffffc0000000000 RSI: ffffffff8a8b2a00 RDI: ffffffff8ad8f680
RBP: ffffc90000dd0f30 R08: dffffc0000000000 R09: fffffbfff1f7f22e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807a52bb80
R13: 1ffff920001ba1e8 R14: dffffc0000000000 R15: 1ffff920001ba1d8
 __do_softirq kernel/softirq.c:592 [inline]
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:641
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1096
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 82 2d a2 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> d7 6c 2f f7 65 8b 05 d8 72 da 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90002fc7580 EFLAGS: 00000206
RAX: 6f2e5cfaba424b00 RBX: 1ffff920005f8eb4 RCX: ffffffff81631708
RDX: dffffc0000000000 RSI: ffffffff8a8b2a00 RDI: 0000000000000001
RBP: ffffc90002fc7610 R08: dffffc0000000000 R09: fffffbfff1f7f22e
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff920005f8eb0 R14: ffffc90002fc75a0 R15: 0000000000000246
 spin_unlock_irqrestore include/linux/spinlock.h:418 [inline]
 __skb_try_recv_datagram+0x1c7/0x6a0 net/core/datagram.c:267
 __unix_dgram_recvmsg+0x3c1/0x1260 net/unix/af_unix.c:2311
 ____sys_recvmsg+0x286/0x530
 ___sys_recvmsg+0x1ec/0x690 net/socket.c:2692
 do_recvmmsg+0x36f/0x8f0 net/socket.c:2786
 __sys_recvmmsg net/socket.c:2865 [inline]
 __do_sys_recvmmsg net/socket.c:2888 [inline]
 __se_sys_recvmmsg net/socket.c:2881 [inline]
 __x64_sys_recvmmsg+0x195/0x240 net/socket.c:2881
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4851c86a19
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f48506e6048 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f4851e15038 RCX: 00007f4851c86a19
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007f4851cf5e49 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f4851e15038 R15: 00007ffe8efc6d18
 </TASK>