Use struct sctp_sack_info instead BUG: unable to handle kernel paging request at fffffffffffffff8 IP: __get_user_4+0x1e/0x30 arch/x86/lib/getuser.S:72 PGD 5e28067 P4D 5e28067 PUD 5e2a067 PMD 0 Oops: 0002 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 5496 Comm: syz-executor1 Not tainted 4.15.0-rc1-next-20171128+ #54 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801950182c0 task.stack: ffff8801c52b8000 netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. RIP: 0010:__get_user_4+0x1e/0x30 arch/x86/lib/getuser.S:72 RSP: 0018:ffff8801c52bf710 EFLAGS: 00010287 RAX: 0000000020000003 RBX: 1ffff10038a57ee8 RCX: ffffffff8199dd28 RDX: 0000000000000001 RSI: ffffc9000380e000 RDI: 0000000000000282 RBP: ffff8801c52bfe08 R08: 0000000000000001 R09: 1ffff10038a57eb7 R10: ffff8801950182c0 R11: 0000000000000001 R12: 000000000000000c R13: ffff8801c3ef6b80 R14: dffffc0000000000 R15: 0000000000000084 FS: 00007f176450f700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffffffffffff8 CR3: 00000001c26d9000 CR4: 00000000001426f0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 00000000000b0602 Call Trace: sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1851 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1830 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x4529d9 RSP: 002b:00007f176450ec58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 00000000004529d9 RDX: 000000000000000c RSI: 0000000000000084 RDI: 0000000000000015 RBP: 000000000000039b R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000212 R12: 00000000006f2728 R13: 00000000ffffffff R14: 00007f176450f6d4 R15: 0000000000000000 Code: 00 c3 90 66 2e 0f 1f 84 00 00 00 00 00 48 83 c0 03 72 4f 65 48 8b 14 25 40 65 01 00 48 3b 82 a0 15 00 00 73 3d 0f 1f 00 8b 50 fd <31> c0 0f 1f 00 c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 48 83 c0 RIP: __get_user_4+0x1e/0x30 arch/x86/lib/getuser.S:72 RSP: ffff8801c52bf710 CR2: fffffffffffffff8 ---[ end trace a37668137a7f40fb ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..