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: 1 UID: 0 PID: 7155 Comm: kworker/u8:18 Not tainted 6.17.0-rc1-syzkaller-00127-g715c7a36d59f #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: a9 7f bb f7 c6 05 88 2b 89 05 01 48 c7 c7 80 a0 9e 8c be 97 05 00 00 48 c7 c2 00 a1 9e 8c e8 fa 59 99 f7 4c 89 e3 48 c1 eb 03 <42> 80 3c 2b 00 74 08 4c 89 e7 e8 c4 e8 1e f8 4d 8b 2c 24 4d 39 f5
RSP: 0018:ffffc9001abf7118 EFLAGS: 00010206
RAX: ffffffff8a042bae RBX: 000000001fffe1ac RCX: ffff8880252e3c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff8880596e9020 R08: ffffffff8f537ba7 R09: 1ffffffff1ea6f74
R10: dffffc0000000000 R11: fffffbfff1ea6f75 R12: 00000000ffff0d60
R13: dffffc0000000000 R14: ffff88814dcf0000 R15: 1ffff1100b2dd204
FS:  0000000000000000(0000) GS:ffff888125d1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000005bf000 CR3: 000000005b65a000 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+0x5a7/0x1ff0 net/core/dev.c:12116
 unregister_netdevice_many net/core/dev.c:12217 [inline]
 unregister_netdevice_queue+0x33c/0x380 net/core/dev.c:12061
 unregister_netdevice include/linux/netdevice.h:3385 [inline]
 nsim_destroy+0x1dd/0x670 drivers/net/netdevsim/netdev.c:1140
 __nsim_dev_port_del+0x14d/0x1b0 drivers/net/netdevsim/dev.c:1473
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1485 [inline]
 nsim_dev_reload_destroy+0x288/0x490 drivers/net/netdevsim/dev.c:1707
 nsim_dev_reload_down+0x8a/0xc0 drivers/net/netdevsim/dev.c:983
 devlink_reload+0x1b3/0x8d0 net/devlink/dev.c:461
 devlink_pernet_pre_exit+0x1d9/0x3d0 net/devlink/core.c:509
 ops_pre_exit_list net/core/net_namespace.c:160 [inline]
 ops_undo_list+0x184/0x990 net/core/net_namespace.c:233
 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+0x3f9/0x770 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: a9 7f bb f7 c6 05 88 2b 89 05 01 48 c7 c7 80 a0 9e 8c be 97 05 00 00 48 c7 c2 00 a1 9e 8c e8 fa 59 99 f7 4c 89 e3 48 c1 eb 03 <42> 80 3c 2b 00 74 08 4c 89 e7 e8 c4 e8 1e f8 4d 8b 2c 24 4d 39 f5
RSP: 0018:ffffc9001abf7118 EFLAGS: 00010206
RAX: ffffffff8a042bae RBX: 000000001fffe1ac RCX: ffff8880252e3c00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff8880596e9020 R08: ffffffff8f537ba7 R09: 1ffffffff1ea6f74
R10: dffffc0000000000 R11: fffffbfff1ea6f75 R12: 00000000ffff0d60
R13: dffffc0000000000 R14: ffff88814dcf0000 R15: 1ffff1100b2dd204
FS:  0000000000000000(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555791405c8 CR3: 00000000670a2000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	a9 7f bb f7 c6       	test   $0xc6f7bb7f,%eax
   5:	05 88 2b 89 05       	add    $0x5892b88,%eax
   a:	01 48 c7             	add    %ecx,-0x39(%rax)
   d:	c7 80 a0 9e 8c be 97 	movl   $0x597,-0x41736160(%rax)
  14:	05 00 00
  17:	48 c7 c2 00 a1 9e 8c 	mov    $0xffffffff8c9ea100,%rdx
  1e:	e8 fa 59 99 f7       	call   0xf7995a1d
  23:	4c 89 e3             	mov    %r12,%rbx
  26:	48 c1 eb 03          	shr    $0x3,%rbx
* 2a:	42 80 3c 2b 00       	cmpb   $0x0,(%rbx,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 e7             	mov    %r12,%rdi
  34:	e8 c4 e8 1e f8       	call   0xf81ee8fd
  39:	4d 8b 2c 24          	mov    (%r12),%r13
  3d:	4d 39 f5             	cmp    %r14,%r13