------------[ cut here ]------------
WARNING: CPU: 0 PID: 7129 at net/ipv4/ipmr.c:2302 ip_mr_output+0xbb1/0xe70 net/ipv4/ipmr.c:2302
Modules linked in:
CPU: 0 UID: 0 PID: 7129 Comm: kworker/u8:8 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
Workqueue: events_unbound linkwatch_event
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: 0018:ffffc900000079a0 EFLAGS: 00010246
RAX: ffffffff89f9ed10 RBX: ffff8880615578c0 RCX: ffff88803046da00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007ab0 R08: ffff88803046da00 R09: 0000000000000004
R10: 0000000000000003 R11: ffffffff89f9e160 R12: 0000000000000010
R13: dffffc0000000000 R14: ffff88805e0d8b00 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888125c52000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30214ff8 CR3: 0000000031630000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
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+0xec/0x180 kernel/softirq.c:480
__local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:407
netdev_for_each_tx_queue include/linux/netdevice.h:2655 [inline]
dev_deactivate_many+0x720/0xd40 net/sched/sch_generic.c:1376
dev_deactivate+0x118/0x1b0 net/sched/sch_generic.c:1399
linkwatch_do_dev+0x10f/0x170 net/core/link_watch.c:184
__linkwatch_run_queue+0x56d/0x7e0 net/core/link_watch.c:244
linkwatch_event+0x4c/0x60 net/core/link_watch.c:304
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245