general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 14603 Comm: syz-executor.3 Not tainted 6.7.0-syzkaller-04690-g39369c9a6e09 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:tipc_udp_nl_dump_remoteip+0x3c7/0xa60 net/tipc/udp_media.c:513 Code: 48 c1 ea 03 80 3c 02 00 0f 85 df 05 00 00 48 8b 9b 98 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 7b c8 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 6b 06 00 00 48 8b 03 48 39 d9 4c 8d 70 c8 0f 84 RSP: 0018:ffffc900160171e8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff88804cc52098 RDX: 0000000000000000 RSI: ffffffff8a288b69 RDI: 0000000000000005 RBP: ffff888047885780 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000001000 R12: 0000000000000000 R13: ffffc90016017268 R14: ffff888047885780 R15: ffffffffffffffc8 FS: 00007f35d634c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1f7a57b038 CR3: 000000002bfe0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: genl_dumpit+0x119/0x220 net/netlink/genetlink.c:1025 netlink_dump+0x588/0xca0 net/netlink/af_netlink.c:2264 __netlink_dump_start+0x6d0/0x9c0 net/netlink/af_netlink.c:2370 genl_family_rcv_msg_dumpit+0x1e1/0x2d0 net/netlink/genetlink.c:1074 genl_family_rcv_msg net/netlink/genetlink.c:1190 [inline] genl_rcv_msg+0x470/0x800 net/netlink/genetlink.c:1208 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1217 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x8b7/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f35d567cda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f35d634c0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f35d57abf80 RCX: 00007f35d567cda9 RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 RBP: 00007f35d56c947a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f35d57abf80 R15: 00007ffed090ed98 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:tipc_udp_nl_dump_remoteip+0x3c7/0xa60 net/tipc/udp_media.c:513 Code: 48 c1 ea 03 80 3c 02 00 0f 85 df 05 00 00 48 8b 9b 98 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 7b c8 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 6b 06 00 00 48 8b 03 48 39 d9 4c 8d 70 c8 0f 84 RSP: 0018:ffffc900160171e8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff88804cc52098 RDX: 0000000000000000 RSI: ffffffff8a288b69 RDI: 0000000000000005 RBP: ffff888047885780 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000001000 R12: 0000000000000000 R13: ffffc90016017268 R14: ffff888047885780 R15: ffffffffffffffc8 FS: 00007f35d634c6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc4601dcf78 CR3: 000000002bfe0000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 c1 ea 03 shr $0x3,%rdx 4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 8: 0f 85 df 05 00 00 jne 0x5ed e: 48 8b 9b 98 00 00 00 mov 0x98(%rbx),%rbx 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 4c 8d 7b c8 lea -0x38(%rbx),%r15 23: 48 89 da mov %rbx,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 6b 06 00 00 jne 0x69f 34: 48 8b 03 mov (%rbx),%rax 37: 48 39 d9 cmp %rbx,%rcx 3a: 4c 8d 70 c8 lea -0x38(%rax),%r14 3e: 0f .byte 0xf 3f: 84 .byte 0x84