netdevsim netdevsim1 netdevsim2 (unregistering): unset [0, 0] type 1 family 0 port 8472 - 0 netdevsim netdevsim1 netdevsim1 (unregistering): unset [0, 0] type 1 family 0 port 8472 - 0 netdevsim netdevsim1 netdevsim0 (unregistering): unset [0, 0] type 1 family 0 port 8472 - 0 Oops: general protection fault, probably for non-canonical address 0xdffffc001fffe1ac: 0000 [#1] SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x00000000ffff0d60-0x00000000ffff0d67] CPU: 0 UID: 0 PID: 7270 Comm: kworker/u8:19 Not tainted 6.16.0-syzkaller-11105-ga6923c06a3b2 #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+0x25a/0x5b0 net/ipv4/igmp.c:1774 Code: 6c 1b 0e f8 69 43 08 47 86 c8 61 49 bd 00 00 00 00 00 fc ff df c1 e8 17 4d 8d 24 c4 eb 2d e8 bd d5 a7 f7 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 0f 85 1e 03 00 00 4d 8b 34 24 4c 39 f3 0f 84 ef 00 RSP: 0018:ffffc9001adbf728 EFLAGS: 00010206 RAX: 000000001fffe1ac RBX: ffff888030930000 RCX: ffffffff8a13b31c RDX: ffff8880358e8000 RSI: ffffffff8a13b2c3 RDI: 0000000000000001 RBP: ffff8880237e3c20 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 00000000ffff0d60 R13: dffffc0000000000 R14: 0000000000000001 R15: 00000000010000e0 FS: 0000000000000000(0000) GS:ffff8881246c8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c391670 CR3: 000000003465e000 CR4: 00000000003526f0 Call Trace: inetdev_event+0x3b2/0x18a0 net/ipv4/devinet.c:1642 notifier_call_chain+0xb9/0x410 kernel/notifier.c:85 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline] call_netdevice_notifiers net/core/dev.c:2281 [inline] netif_close_many+0x319/0x630 net/core/dev.c:1784 unregister_netdevice_many_notify+0x563/0x24c0 net/core/dev.c:12126 ops_exit_rtnl_list net/core/net_namespace.c:186 [inline] ops_undo_list+0x8fc/0xab0 net/core/net_namespace.c:247 cleanup_net+0x408/0x890 net/core/net_namespace.c:682 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c5/0x780 kernel/kthread.c:464 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ip_mc_hash_remove net/ipv4/igmp.c:1431 [inline] RIP: 0010:__ip_mc_dec_group+0x25a/0x5b0 net/ipv4/igmp.c:1774 Code: 6c 1b 0e f8 69 43 08 47 86 c8 61 49 bd 00 00 00 00 00 fc ff df c1 e8 17 4d 8d 24 c4 eb 2d e8 bd d5 a7 f7 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 0f 85 1e 03 00 00 4d 8b 34 24 4c 39 f3 0f 84 ef 00 RSP: 0018:ffffc9001adbf728 EFLAGS: 00010206 RAX: 000000001fffe1ac RBX: ffff888030930000 RCX: ffffffff8a13b31c RDX: ffff8880358e8000 RSI: ffffffff8a13b2c3 RDI: 0000000000000001 RBP: ffff8880237e3c20 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 00000000ffff0d60 R13: dffffc0000000000 R14: 0000000000000001 R15: 00000000010000e0 FS: 0000000000000000(0000) GS:ffff8881246c8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c391670 CR3: 000000007dca1000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 6c insb (%dx),%es:(%rdi) 1: 1b 0e sbb (%rsi),%ecx 3: f8 clc 4: 69 43 08 47 86 c8 61 imul $0x61c88647,0x8(%rbx),%eax b: 49 bd 00 00 00 00 00 movabs $0xdffffc0000000000,%r13 12: fc ff df 15: c1 e8 17 shr $0x17,%eax 18: 4d 8d 24 c4 lea (%r12,%rax,8),%r12 1c: eb 2d jmp 0x4b 1e: e8 bd d5 a7 f7 call 0xf7a7d5e0 23: 4c 89 e0 mov %r12,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 0f 85 1e 03 00 00 jne 0x353 35: 4d 8b 34 24 mov (%r12),%r14 39: 4c 39 f3 cmp %r14,%rbx 3c: 0f .byte 0xf 3d: 84 ef test %ch,%bh