rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (1 ticks this GP) idle=0f1/1/0x4000000000000002 softirq=9956/9959 fqs=2100 
	(detected by 1, t=10503 jiffies, g=11857, q=173071)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4859 Comm: syz.2.28 Not tainted 5.15.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline]
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:331 [inline]
RIP: 0010:rcu_is_watching+0x51/0xa0 kernel/rcu/tree.c:1123
Code: b8 5c 8c 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 70 33 5f 00 48 c7 c3 c8 b2 03 00 49 03 1e 48 89 d8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 1a 8b 03 65 ff 0d 05 36 97 7e 74 08 24 01
RSP: 0018:ffffc90000007908 EFLAGS: 00000806
RAX: 1ffff110171c7659 RBX: ffff8880b8e3b2c8 RCX: ffffffff812d8359
RDX: 0000000000000000 RSI: ffffffff8af9f320 RDI: ffffffff8af9f2e0
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1c14d56
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8c5cb810 R15: dffffc0000000000
FS:  00007f4e162946c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007c900000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 trace_irq_work_entry arch/x86/include/asm/trace/irq_vectors.h:64 [inline]
 __sysvec_irq_work+0x8a/0x250 arch/x86/kernel/irq_work.c:20
 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline]
 sysvec_irq_work+0x4a/0xc0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x84/0x520 kernel/rcu/tree_plugin.h:671
Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 6d 82 96 7e 41 f7 c4 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a
RSP: 0018:ffffc90000007a00 EFLAGS: 00000206
RAX: 92dc949e5bc95000 RBX: 1ffff92000000f48 RCX: ffffffff81633db8
RDX: dffffc0000000000 RSI: ffffffff8aab2b80 RDI: ffffffff8af9f340
RBP: ffffc90000007ad8 R08: dffffc0000000000 R09: fffffbfff2131443
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8cb23d00
R13: ffff888020572218 R14: ffffc90000007a40 R15: 1ffff92000000f44
 __rcu_read_unlock+0x92/0x100 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 igmpv3_send_cr net/ipv4/igmp.c:719 [inline]
 igmp_ifc_timer_expire+0xa8c/0xf60 net/ipv4/igmp.c:813
 call_timer_fn+0x16d/0x560 kernel/time/timer.c:1451
 expire_timers kernel/time/timer.c:1496 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1767
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1780
 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
 __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
 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:do_user_addr_fault arch/x86/mm/fault.c:1263 [inline]
RIP: 0010:handle_page_fault arch/x86/mm/fault.c:1445 [inline]
RIP: 0010:exc_page_fault+0x12b/0x700 arch/x86/mm/fault.c:1501
Code: 00 03 74 0d e8 06 ea 47 f7 fb bb 54 02 00 00 eb 14 bb 14 02 00 00 f6 80 91 00 00 00 02 74 06 e8 eb e9 47 f7 fb 0f 1f 44 00 00 <44> 89 e8 83 e0 02 48 d1 e8 09 c3 41 89 de 41 81 ce 00 01 00 00 41
RSP: 0018:ffffc9000357fb78 EFLAGS: 00000286
RAX: 92dc949e5bc95000 RBX: 0000000000000214 RCX: ffffffff96a90f03
RDX: dffffc0000000000 RSI: ffffffff8aab2b80 RDI: ffffffff8af9f340
RBP: 0000000000000000 R08: ffffffff81870518 R09: ffffed10171c765a
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88802b44e900
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606
RIP: 0010:do_strncpy_from_user lib/strncpy_from_user.c:72 [inline]
RIP: 0010:strncpy_from_user+0x27b/0x370 lib/strncpy_from_user.c:139
Code: 38 4d 01 f4 e9 8f 00 00 00 e8 11 6c 4b fd 49 83 c4 08 4d 89 fd 4c 8b 7c 24 08 31 ff 4c 89 ee e8 db 6f 4b fd 49 83 ed 01 72 44 <42> 8a 5c 25 00 4b 8d 3c 26 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00
RSP: 0018:ffffc9000357fc98 EFLAGS: 00050212
RAX: 0000000000000000 RBX: 00007ffffffff000 RCX: ffff888020571dc0
RDX: 0000000000000000 RSI: 0000000000000fe0 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff843518e5 R09: 0000000000001000
R10: ffff888140008500 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000fdf R14: ffff88802a6b8020 R15: 0000000000000fe0
 getname_flags+0xf5/0x4e0 fs/namei.c:149
 do_sys_openat2+0xd2/0x4f0 fs/open.c:1247
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __x64_sys_openat+0x243/0x290 fs/open.c:1280
 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: 0033:0x7f4e1701bd29
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:00007f4e16294038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f4e1720bfa0 RCX: 00007f4e1701bd29
RDX: 0000000000200002 RSI: 0000000000000000 RDI: ffffffffffffff9c
RBP: 00007f4e17097b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f4e1720bfa0 R15: 00007ffe6008dcc8
 </TASK>