general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 27904 Comm: syz-executor.1 Not tainted 5.5.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:inet6_set_iftoken net/ipv6/addrconf.c:5594 [inline]
RIP: 0010:inet6_set_link_af+0x197/0xae0 net/ipv6/addrconf.c:5725
Code: 85 e4 0f 84 99 04 00 00 e8 76 9d 95 fa 49 8d 44 24 04 48 89 da 48 89 85 e8 fe ff ff 48 c1 ea 03 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 0f 85 61 08 00 00 4c 8b 2b e8 17 06 5b ff 31 ff 41 89
RSP: 0018:ffffc90009006d40 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000a902000
RDX: 0000000000000000 RSI: ffffffff86dfb9ca RDI: 0000000000000005
RBP: ffffc90009006e70 R08: ffff88804e980200 R09: ffffc90009006db0
R10: fffff52001200dbe R11: ffffc90009006df7 R12: ffff88808f9e5028
R13: 0000000000000001 R14: ffff88808f9e5024 R15: dffffc0000000000
FS:  00007f6826205700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2ee24000 CR3: 000000009e1e5000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_setlink+0x2a9f/0x3720 net/core/rtnetlink.c:2754
 __rtnl_newlink+0xbef/0x1790 net/core/rtnetlink.c:3252
 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3377
 rtnetlink_rcv_msg+0x45e/0xaf0 net/core/rtnetlink.c:5438
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5456
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x59e/0x7e0 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:672
 ____sys_sendmsg+0x753/0x880 net/socket.c:2343
 ___sys_sendmsg+0x100/0x170 net/socket.c:2397
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45b399
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6826204c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f68262056d4 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 000000000000000f
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009cb R14: 00000000004cb3c7 R15: 000000000075bf2c
Modules linked in:
---[ end trace c285480c5973346b ]---
RIP: 0010:inet6_set_iftoken net/ipv6/addrconf.c:5594 [inline]
RIP: 0010:inet6_set_link_af+0x197/0xae0 net/ipv6/addrconf.c:5725
Code: 85 e4 0f 84 99 04 00 00 e8 76 9d 95 fa 49 8d 44 24 04 48 89 da 48 89 85 e8 fe ff ff 48 c1 ea 03 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 0f 85 61 08 00 00 4c 8b 2b e8 17 06 5b ff 31 ff 41 89
RSP: 0018:ffffc90009006d40 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000a902000
RDX: 0000000000000000 RSI: ffffffff86dfb9ca RDI: 0000000000000005
RBP: ffffc90009006e70 R08: ffff88804e980200 R09: ffffc90009006db0
R10: fffff52001200dbe R11: ffffc90009006df7 R12: ffff88808f9e5028
R13: 0000000000000001 R14: ffff88808f9e5024 R15: dffffc0000000000
FS:  00007f6826205700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff7d377fb0 CR3: 000000009e1e5000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400