general protection fault, probably for non-canonical address 0xdffffc0000000020: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000100-0x0000000000000107]
CPU: 1 PID: 8675 Comm: syz.3.2407 Not tainted 5.10.237-syzkaller-00309-g7e2543346ff7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__rt6_device_match net/ipv6/route.c:473 [inline]
RIP: 0010:__rt6_nh_dev_match+0x121/0x220 net/ipv6/route.c:497
Code: 74 08 48 89 df e8 4f aa a9 fd 48 8b 1b 31 ff 44 89 fe e8 32 be 6f fd 45 85 ff 74 40 48 81 c3 00 01 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 ce 00 00 00 8b 1b 89 df 44 89 fe e8 d6
RSP: 0018:ffffc90000df6578 EFLAGS: 00010202
RAX: 0000000000000020 RBX: 0000000000000100 RCX: 0000000000000002
RDX: ffff8881287b13c0 RSI: 000000000000000d RDI: 0000000000000000
RBP: ffffc90000df65b8 R08: dffffc0000000000 R09: ffffc90000df6720
R10: fffff520001bece8 R11: 1ffff920001bece4 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000000d
FS: 00007fc906bc96c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000126426000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
nexthop_for_each_fib6_nh+0xf6/0x1e0 net/ipv4/nexthop.c:602
rt6_nh_dev_match net/ipv6/route.c:517 [inline]
rt6_device_match net/ipv6/route.c:546 [inline]
ip6_pol_route_lookup+0x5bb/0x17d0 net/ipv6/route.c:1220
pol_lookup_func include/net/ip6_fib.h:594 [inline]
__fib6_rule_action net/ipv6/fib6_rules.c:232 [inline]
fib6_rule_action+0x1c7/0x710 net/ipv6/fib6_rules.c:270
fib_rules_lookup+0x489/0x8d0 net/core/fib_rules.c:318
fib6_rule_lookup+0x179/0x560 net/ipv6/fib6_rules.c:107
rt6_lookup+0x116/0x1d0 net/ipv6/route.c:1279
ip6_tnl_link_config+0x443/0x9c0 net/ipv6/ip6_tunnel.c:1507
ip6_tnl_dev_init+0x46e/0x640 net/ipv6/ip6_tunnel.c:1937
register_netdevice+0x351/0x13c0 net/core/dev.c:9986
ip6_tnl_create2+0xc2/0x360 net/ipv6/ip6_tunnel.c:290
ip6_tnl_newlink+0x391/0x710 net/ipv6/ip6_tunnel.c:2080
__rtnl_newlink net/core/rtnetlink.c:3482 [inline]
rtnl_newlink+0x11bd/0x1640 net/core/rtnetlink.c:3530
rtnetlink_rcv_msg+0x9db/0xb90 net/core/rtnetlink.c:5610
netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2485
rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5628
netlink_unicast_kernel net/netlink/af_netlink.c:1307 [inline]
netlink_unicast+0x87c/0xa40 net/netlink/af_netlink.c:1333
netlink_sendmsg+0x88d/0xb30 net/netlink/af_netlink.c:1901
sock_sendmsg_nosec net/socket.c:652 [inline]
__sock_sendmsg net/socket.c:664 [inline]
____sys_sendmsg+0x5a2/0x8c0 net/socket.c:2376
___sys_sendmsg+0x1f0/0x260 net/socket.c:2430
__sys_sendmsg net/socket.c:2459 [inline]
__do_sys_sendmsg net/socket.c:2468 [inline]
__se_sys_sendmsg net/socket.c:2466 [inline]
__x64_sys_sendmsg+0x1e2/0x2a0 net/socket.c:2466
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fc9085a2969
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:00007fc906bc9038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc9087ca160 RCX: 00007fc9085a2969
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007fc908624ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc9087ca160 R15: 00007ffc50f5b918
Modules linked in:
---[ end trace 5f852ca734ace620 ]---
RIP: 0010:__rt6_device_match net/ipv6/route.c:473 [inline]
RIP: 0010:__rt6_nh_dev_match+0x121/0x220 net/ipv6/route.c:497
Code: 74 08 48 89 df e8 4f aa a9 fd 48 8b 1b 31 ff 44 89 fe e8 32 be 6f fd 45 85 ff 74 40 48 81 c3 00 01 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 ce 00 00 00 8b 1b 89 df 44 89 fe e8 d6
RSP: 0018:ffffc90000df6578 EFLAGS: 00010202
RAX: 0000000000000020 RBX: 0000000000000100 RCX: 0000000000000002
RDX: ffff8881287b13c0 RSI: 000000000000000d RDI: 0000000000000000
RBP: ffffc90000df65b8 R08: dffffc0000000000 R09: ffffc90000df6720
R10: fffff520001bece8 R11: 1ffff920001bece4 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000000d
FS: 00007fc906bc96c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000126426000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 74 08 je 0xa
2: 48 89 df mov %rbx,%rdi
5: e8 4f aa a9 fd call 0xfda9aa59
a: 48 8b 1b mov (%rbx),%rbx
d: 31 ff xor %edi,%edi
f: 44 89 fe mov %r15d,%esi
12: e8 32 be 6f fd call 0xfd6fbe49
17: 45 85 ff test %r15d,%r15d
1a: 74 40 je 0x5c
1c: 48 81 c3 00 01 00 00 add $0x100,%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 ce 00 00 00 jne 0x105
37: 8b 1b mov (%rbx),%ebx
39: 89 df mov %ebx,%edi
3b: 44 89 fe mov %r15d,%esi
3e: e8 .byte 0xe8
3f: d6 (bad)