netlink: 12 bytes leftover after parsing attributes in process `syz.1.1832'. tipc: Started in network mode tipc: Node identity 00000000000000000000000000000001, cluster identity 4711 general protection fault, probably for non-canonical address 0xdffffc000000006c: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000360-0x0000000000000367] CPU: 1 PID: 12233 Comm: syz.1.1832 Not tainted 5.15.179-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__in6_dev_get include/net/addrconf.h:321 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:412 [inline] RIP: 0010:find_match+0xb4/0xb90 net/ipv6/route.c:741 Code: 08 48 89 df e8 7d c5 aa f8 4c 89 64 24 38 48 89 d8 bb 60 03 00 00 48 03 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 45 89 ef 74 08 48 89 df e8 4b c5 aa f8 4c 8b 23 e8 23 RSP: 0018:ffffc90003d2e628 EFLAGS: 00010206 RAX: 000000000000006c RBX: 0000000000000360 RCX: dffffc0000000000 RDX: ffff88802bfa8000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888142dbbf2f R08: ffffffff891fc95d R09: ffffc90003d2e9f0 R10: ffffc90003d2e9e0 R11: dffffc0000000001 R12: ffffc90003d2e9f0 R13: 0000000000000003 R14: 1ffff110285b77e5 R15: ffffc90003d2e9e0 FS: 00007f3d0bedb6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000010c0 CR3: 0000000051465000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 00000000ffff5325 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rt6_nh_find_match+0xda/0x140 net/ipv6/route.c:781 nexthop_for_each_fib6_nh+0x1c8/0x400 net/ipv4/nexthop.c:1242 __find_rr_leaf+0x590/0x8e0 net/ipv6/route.c:822 find_rr_leaf net/ipv6/route.c:859 [inline] rt6_select net/ipv6/route.c:894 [inline] fib6_table_lookup+0x56b/0xbb0 net/ipv6/route.c:2183 ip6_pol_route+0x1e7/0x15b0 net/ipv6/route.c:2219 pol_lookup_func include/net/ip6_fib.h:582 [inline] fib6_rule_lookup+0x37c/0x620 net/ipv6/fib6_rules.c:120 ip6_route_output_flags+0xc1/0x310 net/ipv6/route.c:2640 ip6_dst_lookup_tail+0x267/0x11a0 net/ipv6/ip6_output.c:1128 ip6_dst_lookup_flow+0xb5/0x170 net/ipv6/ip6_output.c:1231 tipc_udp_xmit+0x36e/0xb60 net/tipc/udp_media.c:210 tipc_bearer_xmit_skb+0x2ca/0x420 net/tipc/bearer.c:577 tipc_enable_bearer net/tipc/bearer.c:368 [inline] __tipc_nl_bearer_enable+0xf5f/0x1250 net/tipc/bearer.c:1049 tipc_nl_bearer_enable+0x1e/0x30 net/tipc/bearer.c:1058 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline] genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0xfc2/0x14a0 net/netlink/genetlink.c:792 netlink_rcv_skb+0x1cf/0x410 net/netlink/af_netlink.c:2489 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline] netlink_unicast+0x7c0/0x990 net/netlink/af_netlink.c:1337 netlink_sendmsg+0xa30/0xd60 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:704 [inline] __sock_sendmsg net/socket.c:716 [inline] ____sys_sendmsg+0x59e/0x8f0 net/socket.c:2436 ___sys_sendmsg+0x252/0x2e0 net/socket.c:2490 __sys_sendmsg net/socket.c:2519 [inline] __do_sys_sendmsg net/socket.c:2528 [inline] __se_sys_sendmsg+0x19a/0x260 net/socket.c:2526 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f3d0e072169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3d0bedb038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f3d0e28afa0 RCX: 00007f3d0e072169 RDX: 0000000000000000 RSI: 00002000000010c0 RDI: 0000000000000006 RBP: 00007f3d0e0f32a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f3d0e28afa0 R15: 00007ffcd5864128 Modules linked in: ---[ end trace 609b4b2f521f17ea ]--- RIP: 0010:__in6_dev_get include/net/addrconf.h:321 [inline] RIP: 0010:ip6_ignore_linkdown include/net/addrconf.h:412 [inline] RIP: 0010:find_match+0xb4/0xb90 net/ipv6/route.c:741 Code: 08 48 89 df e8 7d c5 aa f8 4c 89 64 24 38 48 89 d8 bb 60 03 00 00 48 03 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 45 89 ef 74 08 48 89 df e8 4b c5 aa f8 4c 8b 23 e8 23 RSP: 0018:ffffc90003d2e628 EFLAGS: 00010206 RAX: 000000000000006c RBX: 0000000000000360 RCX: dffffc0000000000 RDX: ffff88802bfa8000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888142dbbf2f R08: ffffffff891fc95d R09: ffffc90003d2e9f0 R10: ffffc90003d2e9e0 R11: dffffc0000000001 R12: ffffc90003d2e9f0 R13: 0000000000000003 R14: 1ffff110285b77e5 R15: ffffc90003d2e9e0 FS: 00007f3d0bedb6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000010c0 CR3: 0000000051465000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 00000000ffff5325 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 08 48 89 or %cl,-0x77(%rax) 3: df e8 fucomip %st(0),%st 5: 7d c5 jge 0xffffffcc 7: aa stos %al,%es:(%rdi) 8: f8 clc 9: 4c 89 64 24 38 mov %r12,0x38(%rsp) e: 48 89 d8 mov %rbx,%rax 11: bb 60 03 00 00 mov $0x360,%ebx 16: 48 03 18 add (%rax),%rbx 19: 48 89 d8 mov %rbx,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 45 89 ef mov %r13d,%r15d 31: 74 08 je 0x3b 33: 48 89 df mov %rbx,%rdi 36: e8 4b c5 aa f8 call 0xf8aac586 3b: 4c 8b 23 mov (%rbx),%r12 3e: e8 .byte 0xe8 3f: 23 .byte 0x23