netlink: 12 bytes leftover after parsing attributes in process `syz.3.9248'.
general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 0 PID: 29348 Comm: syz.3.9248 Tainted: G W syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:fib6_nh_get_excptn_bucket net/ipv6/route.c:1656 [inline]
RIP: 0010:rt6_find_cached_rt net/ipv6/route.c:1851 [inline]
RIP: 0010:ip6_pol_route+0x1d0/0x1130 net/ipv6/route.c:2266
Code: e8 55 8b ff ff 48 83 c4 08 49 83 c7 30 48 8b 9c 24 90 00 00 00 48 83 c3 60 48 89 d8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df <42> 80 3c 20 00 74 08 48 89 df e8 41 62 59 fd 48 8b 03 48 83 e0 fe
RSP: 0018:ffffc900149d70c0 EFLAGS: 00010206
RAX: 000000000000000c RBX: 0000000000000060 RCX: dffffc0000000000
RDX: ffff88811dd2d100 RSI: 0000000000000002 RDI: 000000000000000a
RBP: ffffc900149d71f8 R08: ffff88811dd2d100 R09: 0000000000000002
R10: 000000000000000a R11: 0000000000000002 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff888123068760 R15: ffffc900149d7710
FS: 00007f32749846c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2eb1bff8 CR3: 0000000149d71000 CR4: 00000000003506b0
Call Trace:
<TASK>
ip6_pol_route_output+0x51/0x80 net/ipv6/route.c:2634
pol_lookup_func include/net/ip6_fib.h:589 [inline]
fib6_rule_lookup+0x364/0x5f0 net/ipv6/fib6_rules.c:121
ip6_route_output_flags_noref+0x283/0x340 net/ipv6/route.c:2666
ip6_route_output_flags+0x3c/0x200 net/ipv6/route.c:2679
ip6_dst_lookup_tail+0x1f2/0x14f0 net/ipv6/ip6_output.c:1152
ip6_dst_lookup_flow+0x49/0xc0 net/ipv6/ip6_output.c:1255
tcp_v6_connect+0x8ab/0x1590 net/ipv6/tcp_ipv6.c:287
__inet_stream_connect+0x264/0xe70 net/ipv4/af_inet.c:675
tcp_sendmsg_fastopen+0x3ac/0x600 net/ipv4/tcp.c:1205
tcp_sendmsg_locked+0x386a/0x3de0 net/ipv4/tcp.c:1253
tcp_sendmsg+0x2f/0x50 net/ipv4/tcp.c:1488
inet6_sendmsg+0xb6/0xd0 net/ipv6/af_inet6.c:673
sock_sendmsg_nosec net/socket.c:716 [inline]
__sock_sendmsg net/socket.c:728 [inline]
__sys_sendto+0x4ac/0x660 net/socket.c:2142
__do_sys_sendto net/socket.c:2154 [inline]
__se_sys_sendto net/socket.c:2150 [inline]
__x64_sys_sendto+0xe5/0x100 net/socket.c:2150
x64_sys_call+0x83/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:45
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3273b9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3274984028 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f3273e15fa0 RCX: 00007f3273b9c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008
RBP: 00007f3273c32c99 R08: 00002000000001c0 R09: 000000000000001c
R10: 0000000020000050 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3273e16038 R14: 00007f3273e15fa0 R15: 00007ffe10abda78
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fib6_nh_get_excptn_bucket net/ipv6/route.c:1656 [inline]
RIP: 0010:rt6_find_cached_rt net/ipv6/route.c:1851 [inline]
RIP: 0010:ip6_pol_route+0x1d0/0x1130 net/ipv6/route.c:2266
Code: e8 55 8b ff ff 48 83 c4 08 49 83 c7 30 48 8b 9c 24 90 00 00 00 48 83 c3 60 48 89 d8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df <42> 80 3c 20 00 74 08 48 89 df e8 41 62 59 fd 48 8b 03 48 83 e0 fe
RSP: 0018:ffffc900149d70c0 EFLAGS: 00010206
RAX: 000000000000000c RBX: 0000000000000060 RCX: dffffc0000000000
RDX: ffff88811dd2d100 RSI: 0000000000000002 RDI: 000000000000000a
RBP: ffffc900149d71f8 R08: ffff88811dd2d100 R09: 0000000000000002
R10: 000000000000000a R11: 0000000000000002 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff888123068760 R15: ffffc900149d7710
FS: 00007f32749846c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3273be9e80 CR3: 0000000149d71000 CR4: 00000000003506a0
----------------
Code disassembly (best guess):
0: e8 55 8b ff ff call 0xffff8b5a
5: 48 83 c4 08 add $0x8,%rsp
9: 49 83 c7 30 add $0x30,%r15
d: 48 8b 9c 24 90 00 00 mov 0x90(%rsp),%rbx
14: 00
15: 48 83 c3 60 add $0x60,%rbx
19: 48 89 d8 mov %rbx,%rax
1c: 48 c1 e8 03 shr $0x3,%rax
20: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12
27: fc ff df
* 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 41 62 59 fd call 0xfd59627a
39: 48 8b 03 mov (%rbx),%rax
3c: 48 83 e0 fe and $0xfffffffffffffffe,%rax