Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 12529 Comm: syz.0.1789 Not tainted 6.14.0-rc7-syzkaller-00137-g5fc319360819 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:tipc_udp_nl_dump_remoteip+0x579/0x9c0
Code: 81 d0 00 00 00 48 89 44 24 58 48 8d 81 c8 00 00 00 48 89 44 24 40 45 31 ff 48 89 5c 24 10 4c 89 74 24 50 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 d8 59 81 f6 49 8b 04 24 48 89 44
RSP: 0018:ffffc90004a67040 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88804b5da5e8 RCX: ffff8880291bf500
RDX: ffffc9000ba99000 RSI: 000000000000021b RDI: 000000000000021c
RBP: ffffc90004a67190 R08: ffffffff89d13d66 R09: 1ffffffff2079f6e
R10: dffffc0000000000 R11: fffffbfff2079f6f R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88804996c098 R15: 0000000000000000
FS:  00007f661b13a6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c35fdb3 CR3: 000000007cca4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 genl_dumpit+0x10d/0x1b0 net/netlink/genetlink.c:1027
 netlink_dump+0x64d/0xe10 net/netlink/af_netlink.c:2308
 __netlink_dump_start+0x5a2/0x790 net/netlink/af_netlink.c:2423
 genl_family_rcv_msg_dumpit net/netlink/genetlink.c:1076 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:1192 [inline]
 genl_rcv_msg+0x894/0xec0 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x206/0x480 net/netlink/af_netlink.c:2533
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1338
 netlink_sendmsg+0x8de/0xcb0 net/netlink/af_netlink.c:1882
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:733
 ____sys_sendmsg+0x53a/0x860 net/socket.c:2573
 ___sys_sendmsg net/socket.c:2627 [inline]
 __sys_sendmsg+0x269/0x350 net/socket.c:2659
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f661a38d169
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:00007f661b13a038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f661a5a5fa0 RCX: 00007f661a38d169
RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000007
RBP: 00007f661a40e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f661a5a5fa0 R15: 00007fffbc78fd58
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:tipc_udp_nl_dump_remoteip+0x579/0x9c0
Code: 81 d0 00 00 00 48 89 44 24 58 48 8d 81 c8 00 00 00 48 89 44 24 40 45 31 ff 48 89 5c 24 10 4c 89 74 24 50 4c 89 e0 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 e7 e8 d8 59 81 f6 49 8b 04 24 48 89 44
RSP: 0018:ffffc90004a67040 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88804b5da5e8 RCX: ffff8880291bf500
RDX: ffffc9000ba99000 RSI: 000000000000021b RDI: 000000000000021c
RBP: ffffc90004a67190 R08: ffffffff89d13d66 R09: 1ffffffff2079f6e
R10: dffffc0000000000 R11: fffffbfff2079f6f R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88804996c098 R15: 0000000000000000
FS:  00007f661b13a6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d835762d8 CR3: 000000007cca4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	81 d0 00 00 00 48    	adc    $0x48000000,%eax
   6:	89 44 24 58          	mov    %eax,0x58(%rsp)
   a:	48 8d 81 c8 00 00 00 	lea    0xc8(%rcx),%rax
  11:	48 89 44 24 40       	mov    %rax,0x40(%rsp)
  16:	45 31 ff             	xor    %r15d,%r15d
  19:	48 89 5c 24 10       	mov    %rbx,0x10(%rsp)
  1e:	4c 89 74 24 50       	mov    %r14,0x50(%rsp)
  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:	74 08                	je     0x39
  31:	4c 89 e7             	mov    %r12,%rdi
  34:	e8 d8 59 81 f6       	call   0xf6815a11
  39:	49 8b 04 24          	mov    (%r12),%rax
  3d:	48                   	rex.W
  3e:	89                   	.byte 0x89
  3f:	44                   	rex.R