------------[ cut here ]------------
WARNING: CPU: 1 PID: 8319 at net/ipv4/ipmr.c:2302 ip_mr_output+0xbb1/0xe70 net/ipv4/ipmr.c:2302
Modules linked in:
CPU: 1 UID: 0 PID: 8319 Comm: syz.3.594 Not tainted 6.16.0-rc1-syzkaller-00436-g253833da4e56 #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 0e 77 c6 f7 48 8b 74 24 18 45 31 f6 31 ff ba 02 00 00 00 e8 4a 16 4c ff e9 45 f6 ff ff e8 f0 76 c6 f7 90 <0f> 0b 90 e9 94 f5 ff ff e8 e2 76 c6 f7 90 0f 0b 90 42 80 3c 2b 00
RSP: 0000:ffffc90003f0f840 EFLAGS: 00010246
RAX: ffffffff89f9e800 RBX: ffff888056c358c0 RCX: ffff888027d45a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003f0f950 R08: ffff888027d45a00 R09: 0000000000000004
R10: 0000000000000003 R11: ffffffff89f9dc50 R12: 0000000000000010
R13: dffffc0000000000 R14: ffff888032e7fa00 R15: 0000000000000000
FS:  0000555556e7e500(0000) GS:ffff888125d52000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdafaf743e0 CR3: 000000007978c000 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: 0033:0x7fdafae67d90
Code: 66 2e 0f 1f 84 00 00 00 00 00 48 8b 70 f8 48 83 e8 08 48 39 f2 72 f3 48 39 c3 73 3e 48 89 33 48 83 c3 08 48 8b 70 f8 48 89 08 <48> 8b 0b 49 8b 14 24 eb bf 48 39 f2 72 97 48 39 f0 73 46 49 89 34
RSP: 002b:00007ffcda5f85d0 EFLAGS: 00000202
RAX: 00007fdafa60a7f0 RBX: 00007fdafa60a558 RCX: ffffffff898be861
RDX: ffffffff898bbd94 RSI: ffffffff898bf66c RDI: 00007fdafa60abb8
RBP: 00007fdafa609df0 R08: 00007fdafa60a4d0 R09: 00007fdafb1a2000
R10: 00007fdafa5ff008 R11: 0000000000000014 R12: 00007fdafa609de8
R13: 0000000000000010 R14: 00007ffcda5f87e8 R15: 00007fdafa5ff008
 </TASK>