rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 GPs behind) idle=4eb/1/0x4000000000000002 softirq=11482/11485 fqs=5246 
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5128
	(detected by 1, t=10502 jiffies, g=15413, q=1218)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5128 Comm: syz.4.180 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:irqtime_account_irq+0x3d/0x1b0 kernel/sched/cputime.c:52
Code: 08 89 c3 83 f8 08 0f 83 7d 01 00 00 49 bc 00 00 00 00 00 fc ff df 4c 8d 3c dd 20 c8 bc 8b 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 <74> 08 4c 89 ff e8 69 79 68 00 80 3d f2 12 9a 0d 01 0f 85 3d 01 00
RSP: 0018:ffffc90000007c88 EFLAGS: 00000046
RAX: 1ffffffff1779904 RBX: 0000000000000000 RCX: 026d6123cc1adf00
RDX: 0000000000000000 RSI: ffffffff8a59e560 RDI: ffffffff8a59e520
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1ad33a6
R10: fffffbfff1ad33a6 R11: 1ffffffff1ad33a5 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888028e5bb80 R15: ffffffff8bbcc820
FS:  00007f70fc2f46c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555671685c8 CR3: 0000000061faf000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 account_hardirq_exit include/linux/vtime.h:159 [inline]
 __irq_exit_rcu+0x8d/0x220 kernel/softirq.c:656
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x4f/0xc0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:ffs arch/x86/include/asm/bitops.h:297 [inline]
RIP: 0010:handle_softirqs+0x1a9/0x820 kernel/softirq.c:564
Code: 24 78 44 89 64 24 28 0f b7 db 48 c7 c7 80 04 0a 8a e8 5b 07 61 08 65 66 c7 05 51 21 bb 7e 00 00 e8 3c 72 35 00 fb 89 5c 24 34 <b8> ff ff ff ff 0f bc 44 24 34 41 89 c5 41 ff c5 0f 85 c1 00 00 00
RSP: 0018:ffffc90000007e20 EFLAGS: 00000282
RAX: 026d6123cc1adf00 RBX: 0000000000000200 RCX: 026d6123cc1adf00
RDX: dffffc0000000000 RSI: ffffffff8a0b1c60 RDI: ffffffff8a59e580
RBP: ffffc90000007f30 R08: dffffc0000000000 R09: fffffbfff1ff7c1a
R10: fffffbfff1ff7c1a R11: 1ffffffff1ff7c19 R12: 000000000000000a
R13: 0000000000000000 R14: ffff888028e5bb80 R15: dffffc0000000000
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__rcu_read_unlock+0x34/0xd0 kernel/rcu/tree_plugin.h:419
Code: bf 00 00 00 00 00 fc ff df 65 48 8b 3d 15 13 9e 7e 48 8d 9f 3c 04 00 00 49 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 48 ff 0b <75> 1d 4c 8d b7 40 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84
RSP: 0018:ffffc9000135f730 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888028e5bfbc RCX: ffff888028e5bb80
RDX: 0000000000000000 RSI: ffffffff8a59e560 RDI: ffff888028e5bb80
RBP: ffffc9000135f870 R08: dffffc0000000000 R09: fffffbfff1ff7c19
R10: fffffbfff1ff7c19 R11: 1ffffffff1ff7c18 R12: 1ffff110051cb7f7
R13: dffffc0000000000 R14: ffff88814d79d110 R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 inet_twsk_purge+0x778/0x810 net/ipv4/inet_timewait_sock.c:309
 ops_exit_list net/core/net_namespace.c:177 [inline]
 setup_net+0x822/0x9f0 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+0x180f/0x3e00 kernel/fork.c:2293
 kernel_clone+0x219/0x930 kernel/fork.c:2679
 __do_sys_clone kernel/fork.c:2796 [inline]
 __se_sys_clone kernel/fork.c:2780 [inline]
 __x64_sys_clone+0x170/0x1c0 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: 0033:0x7f70fe08d6c9
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:00007f70fc2f3fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f70fe2e3fa0 RCX: 00007f70fe08d6c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040022000
RBP: 00007f70fe10ff91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f70fe2e4038 R14: 00007f70fe2e3fa0 R15: 00007ffc47390658
 </TASK>
task:syz.4.180       state:R  running task     stack:23552 pid: 5128 ppid:  4191 flags:0x0000400e
Call Trace:
 <TASK>
 </TASK>