Oops: general protection fault, probably for non-canonical address 0xdffffc001fffe1ac: 0000 [#1] SMP KASAN PTI
KASAN: probably user-memory-access in range [0x00000000ffff0d60-0x00000000ffff0d67]
CPU: 0 UID: 0 PID: 1166 Comm: kworker/u8:6 Not tainted 6.16.0-syzkaller-12126-g4faff70959d5 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:ip_mc_hash_remove net/ipv4/igmp.c:1431 [inline]
RIP: 0010:__ip_mc_dec_group+0x2fd/0x690 net/ipv4/igmp.c:1774
Code: b9 0c bc f7 c6 05 18 84 89 05 01 48 c7 c7 00 90 9e 8c be 97 05 00 00 48 c7 c2 80 90 9e 8c e8 ea e6 99 f7 4c 89 e3 48 c1 eb 03 <42> 80 3c 2b 00 74 08 4c 89 e7 e8 24 77 1f f8 4d 8b 2c 24 4d 39 f5
RSP: 0018:ffffc90003eaf4f8 EFLAGS: 00010206
RAX: ffffffff8a039ebe RBX: 000000001fffe1ac RCX: ffff888027090000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff88807e288c20 R08: ffffffff8f5348e7 R09: 1ffffffff1ea691c
R10: dffffc0000000000 R11: fffffbfff1ea691d R12: 00000000ffff0d60
R13: dffffc0000000000 R14: ffff88803090e000 R15: 1ffff1100fc51184
FS:  0000000000000000(0000) GS:ffff888125c21000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002fb26000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 inetdev_event+0x2a7/0x15b0 net/ipv4/devinet.c:1642
 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
 call_netdevice_notifiers net/core/dev.c:2281 [inline]
 netif_close_many+0x29c/0x410 net/core/dev.c:1784
 unregister_netdevice_many_notify+0x7b9/0x1ff0 net/core/dev.c:12124
 ops_exit_rtnl_list net/core/net_namespace.c:186 [inline]
 ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:247
 cleanup_net+0x4c5/0x800 net/core/net_namespace.c:682
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ip_mc_hash_remove net/ipv4/igmp.c:1431 [inline]
RIP: 0010:__ip_mc_dec_group+0x2fd/0x690 net/ipv4/igmp.c:1774
Code: b9 0c bc f7 c6 05 18 84 89 05 01 48 c7 c7 00 90 9e 8c be 97 05 00 00 48 c7 c2 80 90 9e 8c e8 ea e6 99 f7 4c 89 e3 48 c1 eb 03 <42> 80 3c 2b 00 74 08 4c 89 e7 e8 24 77 1f f8 4d 8b 2c 24 4d 39 f5
RSP: 0018:ffffc90003eaf4f8 EFLAGS: 00010206
RAX: ffffffff8a039ebe RBX: 000000001fffe1ac RCX: ffff888027090000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff88807e288c20 R08: ffffffff8f5348e7 R09: 1ffffffff1ea691c
R10: dffffc0000000000 R11: fffffbfff1ea691d R12: 00000000ffff0d60
R13: dffffc0000000000 R14: ffff88803090e000 R15: 1ffff1100fc51184
FS:  0000000000000000(0000) GS:ffff888125d21000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e9873ae9c CR3: 0000000011fb2000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 4 bytes skipped:
   0:	c6 05 18 84 89 05 01 	movb   $0x1,0x5898418(%rip)        # 0x589841f
   7:	48 c7 c7 00 90 9e 8c 	mov    $0xffffffff8c9e9000,%rdi
   e:	be 97 05 00 00       	mov    $0x597,%esi
  13:	48 c7 c2 80 90 9e 8c 	mov    $0xffffffff8c9e9080,%rdx
  1a:	e8 ea e6 99 f7       	call   0xf799e709
  1f:	4c 89 e3             	mov    %r12,%rbx
  22:	48 c1 eb 03          	shr    $0x3,%rbx
* 26:	42 80 3c 2b 00       	cmpb   $0x0,(%rbx,%r13,1) <-- trapping instruction
  2b:	74 08                	je     0x35
  2d:	4c 89 e7             	mov    %r12,%rdi
  30:	e8 24 77 1f f8       	call   0xf81f7759
  35:	4d 8b 2c 24          	mov    (%r12),%r13
  39:	4d 39 f5             	cmp    %r14,%r13