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: 27489 Comm: syz-executor Not tainted 6.16.0-syzkaller-06574-gd9104cec3e8f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:____ip_mc_inc_group+0x214/0xde0 net/ipv4/igmp.c:-1 Code: c0 8f 05 01 48 c7 c7 a0 f7 9b 8c be ec 05 00 00 48 c7 c2 20 f8 9b 8c e8 7a fd a2 f7 44 89 e8 4d 8d 34 c6 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 de 35 28 f8 4d 8b 2e 4d 85 ed 0f 84 RSP: 0018:ffffc9000bbceb30 EFLAGS: 00010206 RAX: 000000001fffe1ac RBX: dffffc0000000000 RCX: ffff88803346bc00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff8f508fa7 R09: 1ffffffff1ea11f4 R10: dffffc0000000000 R11: fffffbfff1ea11f5 R12: 00000000010000e0 R13: 00000000000001ac R14: 00000000ffff0d60 R15: 0000000000000cc0 FS: 000055557d03f500(0000) GS:ffff888125c80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000004459a000 CR4: 00000000003526f0 Call Trace: __ip_mc_inc_group net/ipv4/igmp.c:1573 [inline] ip_mc_inc_group net/ipv4/igmp.c:1579 [inline] ip_mc_up+0x125/0x300 net/ipv4/igmp.c:1880 inetdev_event+0xfb3/0x15b0 net/ipv4/devinet.c:1631 notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline] call_netdevice_notifiers net/core/dev.c:2281 [inline] __dev_notify_flags+0x18d/0x2e0 net/core/dev.c:-1 netif_change_flags+0xe8/0x1a0 net/core/dev.c:9608 do_setlink+0xc55/0x41c0 net/core/rtnetlink.c:3143 rtnl_changelink net/core/rtnetlink.c:3761 [inline] __rtnl_newlink net/core/rtnetlink.c:3920 [inline] rtnl_newlink+0x160b/0x1c70 net/core/rtnetlink.c:4057 rtnetlink_rcv_msg+0x7cc/0xb70 net/core/rtnetlink.c:6946 netlink_rcv_skb+0x205/0x470 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82c/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:729 __sys_sendto+0x3bd/0x520 net/socket.c:2228 __do_sys_sendto net/socket.c:2235 [inline] __se_sys_sendto net/socket.c:2231 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2231 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb24ed909fc Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b RSP: 002b:00007fff2f38ccd0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fb24fae4620 RCX: 00007fb24ed909fc RDX: 000000000000002c RSI: 00007fb24fae4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007fff2f38cd24 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007fb24fae4670 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:____ip_mc_inc_group+0x214/0xde0 net/ipv4/igmp.c:-1 Code: c0 8f 05 01 48 c7 c7 a0 f7 9b 8c be ec 05 00 00 48 c7 c2 20 f8 9b 8c e8 7a fd a2 f7 44 89 e8 4d 8d 34 c6 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 de 35 28 f8 4d 8b 2e 4d 85 ed 0f 84 RSP: 0018:ffffc9000bbceb30 EFLAGS: 00010206 RAX: 000000001fffe1ac RBX: dffffc0000000000 RCX: ffff88803346bc00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff8f508fa7 R09: 1ffffffff1ea11f4 R10: dffffc0000000000 R11: fffffbfff1ea11f5 R12: 00000000010000e0 R13: 00000000000001ac R14: 00000000ffff0d60 R15: 0000000000000cc0 FS: 000055557d03f500(0000) GS:ffff888125c80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555700325c8 CR3: 000000004459a000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: c0 8f 05 01 48 c7 c7 rorb $0xc7,-0x38b7fefb(%rdi) 7: a0 f7 9b 8c be ec 05 movabs 0x5ecbe8c9bf7,%al e: 00 00 10: 48 c7 c2 20 f8 9b 8c mov $0xffffffff8c9bf820,%rdx 17: e8 7a fd a2 f7 call 0xf7a2fd96 1c: 44 89 e8 mov %r13d,%eax 1f: 4d 8d 34 c6 lea (%r14,%rax,8),%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 f7 mov %r14,%rdi 33: e8 de 35 28 f8 call 0xf8283616 38: 4d 8b 2e mov (%r14),%r13 3b: 4d 85 ed test %r13,%r13 3e: 0f .byte 0xf 3f: 84 .byte 0x84