------------[ cut here ]------------
WARNING: CPU: 1 PID: 6669 at net/ipv4/ipmr.c:2302 ip_mr_output+0xbb1/0xe70 net/ipv4/ipmr.c:2302
Modules linked in:
CPU: 1 UID: 0 PID: 6669 Comm: syz.0.266 Not tainted 6.16.0-rc1-syzkaller-00482-gafc783fa0aab #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ip_mr_output+0xbb1/0xe70 net/ipv4/ipmr.c:2302
Code: df e9 63 f6 ff ff e8 fe 71 c6 f7 48 8b 74 24 18 45 31 f6 31 ff ba 02 00 00 00 e8 3a 11 4c ff e9 45 f6 ff ff e8 e0 71 c6 f7 90 <0f> 0b 90 e9 94 f5 ff ff e8 d2 71 c6 f7 90 0f 0b 90 42 80 3c 2b 00
RSP: 0000:ffffc9001b2d7840 EFLAGS: 00010246
RAX: ffffffff89f9ed10 RBX: ffff88806c66e640 RCX: ffff888025768000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9001b2d7950 R08: ffff888025768000 R09: 0000000000000004
R10: 0000000000000003 R11: ffffffff89f9e160 R12: 0000000000000010
R13: dffffc0000000000 R14: ffff88807e07c500 R15: 0000000000000000
FS:  000055555fdbf500(0000) GS:ffff888125d52000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd8d0fb5fa4 CR3: 00000000797d4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 igmp_send_report+0x89e/0xdb0 net/ipv4/igmp.c:799
 igmp_timer_expire+0x204/0x510 net/ipv4/igmp.c:-1
 call_timer_fn+0x17e/0x5f0 kernel/time/timer.c:1747
 expire_timers kernel/time/timer.c:1798 [inline]
 __run_timers kernel/time/timer.c:2372 [inline]
 __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384
 run_timer_base kernel/time/timer.c:2393 [inline]
 run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
 sysvec_apic_timer_interrupt+0x57/0xc0 arch/x86/kernel/apic/apic.c:1050
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0033:0x7fd8d0d45a75
Code: 11 0e 00 00 89 c5 85 c0 0f 85 a2 00 00 00 c6 44 24 43 01 eb 09 c6 44 24 43 00 4c 8b 24 24 e8 a2 8b 04 00 4c 8b 2d 23 1a da 00 <48> 8b 0d 2c 1a da 00 31 d2 8d 68 ff 89 c3 4c 01 e9 48 63 f5 48 83
RSP: 002b:00007ffc417946b0 EFLAGS: 00000206
RAX: 0000000000001000 RBX: 0000000000000064 RCX: 00007fd8d0fb5fa0
RDX: 00007fd8d0c5ea70 RSI: 00007ffc41794800 RDI: 00007ffc417947f8
RBP: 00007fd8d0fb5fa0 R08: 0000000000000002 R09: 0000000024f21baa
R10: 00007fd8d0fb5fa0 R11: 0000000000000246 R12: 00007ffc41794800
R13: 0000000000000040 R14: 00007ffc417947f8 R15: 0000000000000003
 </TASK>