rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (2 ticks this GP) idle=379/1/0x4000000000000000 softirq=42738/42738 fqs=2100 
	(detected by 1, t=10504 jiffies, g=59149, q=1946)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 15115 Comm: syz.8.2240 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__irq_exit_rcu+0x1b8/0x230 kernel/softirq.c:662
Code: 0e 36 e0 45 4b c7 04 27 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 40 75 0f 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d <c3> e8 92 7e 73 08 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 51 ff ff
RSP: 0018:ffffc90000007fe8 EFLAGS: 00000046
RAX: 8a3c017eefd2dd00 RBX: ffffc90002eef498 RCX: 8a3c017eefd2dd00
RDX: 0000000000000002 RSI: ffffffff8a79fe20 RDI: ffff8880b903ad58
RBP: 0000000000000000 R08: ffff88813fe1e407 R09: 1ffff11027fc3c80
R10: dffffc0000000000 R11: ffffed1027fc3c81 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f09549936c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3e48376440 CR3: 000000006367a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600
Call Trace:
 <IRQ>
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x9d/0xc0 arch/x86/kernel/irq_work.c:17
 </IRQ>
 <TASK>
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:in_lock_functions+0x7/0x20 kernel/locking/spinlock.c:403
Code: 40 56 21 92 80 e1 07 80 c1 03 38 c1 0f 8c 77 ff ff ff 48 c7 c7 40 56 21 92 e8 f5 10 60 00 e9 66 ff ff ff 48 81 ff 70 44 c6 89 <0f> 93 c0 48 81 ff be 54 c6 89 0f 92 c1 20 c1 0f b6 c1 c3 00 00 cc
RSP: 0018:ffffc90002eef540 EFLAGS: 00000287
RAX: 0000000000000001 RBX: ffffffff89c5211f RCX: 0000000000000000
RDX: ffffc90003dd3000 RSI: 000000000007ffff RDI: ffffffff89c5211f
RBP: ffffc90002eef5d8 R08: ffffffff8d89f06f R09: 1ffffffff1b13e0d
R10: dffffc0000000000 R11: fffffbfff1b13e0e R12: 1ffff920005dded4
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff920005ddeac
 get_lock_parent_ip include/linux/ftrace.h:857 [inline]
 preempt_latency_start+0x20/0x70 kernel/sched/core.c:5490
 preempt_schedule_notrace+0xcf/0x120 kernel/sched/core.c:6643
 preempt_schedule_notrace_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x85f/0x8a0 kernel/locking/lockdep.c:5634
 rcu_read_unlock include/linux/rcupdate.h:773 [inline]
 inet_twsk_purge+0x7a7/0x840 net/ipv4/inet_timewait_sock.c:309
 ops_exit_list net/core/net_namespace.c:177 [inline]
 setup_net+0x844/0xa10 net/core/net_namespace.c:365
 copy_net_ns+0x348/0x5b0 net/core/net_namespace.c:503
 create_new_namespaces+0x3d3/0x6f0 kernel/nsproxy.c:110
 copy_namespaces+0x37d/0x3e0 kernel/nsproxy.c:178
 copy_process+0x1834/0x3e20 kernel/fork.c:2293
 kernel_clone+0x23f/0x990 kernel/fork.c:2679
 __do_sys_clone kernel/fork.c:2796 [inline]
 __se_sys_clone kernel/fork.c:2780 [inline]
 __x64_sys_clone+0x19a/0x210 kernel/fork.c:2780
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f0956739dd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0954992fd8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f09569b2fa0 RCX: 00007f0956739dd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000c0126080
RBP: 00007f09567cfd69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007f09569b3038 R14: 00007f09569b2fa0 R15: 00007ffcf4831b68
 </TASK>