IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7972 Comm: syz-executor.1 Not tainted 5.2.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:inet6_set_link_af+0x576/0x980 net/ipv6/addrconf.c:5735
Code: 07 38 d0 7f 08 84 c0 0f 85 aa 02 00 00 48 8d bb b0 02 00 00 45 0f b6 6d 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e a5 02 00 00 44 89 ab b0 02 00
RSP: 0018:ffff888084f3ee20 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000056 RSI: 0000000000000000 RDI: 00000000000002b0
RBP: ffff888084f3ef50 R08: 0000000000000005 R09: ffff888084f3eea0
R10: dffffc0000000000 R11: 1ffff110109e7dad R12: 1ffff110109e7dc8
R13: 0000000000000000 R14: 000000000000000c R15: ffff88808c3b4024
FS:  00007f54e527f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561850950af8 CR3: 0000000096746000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_setlink+0x188a/0x2db0 net/core/rtnetlink.c:2650
 rtnl_group_changelink net/core/rtnetlink.c:2973 [inline]
 __rtnl_newlink+0x889/0x13f0 net/core/rtnetlink.c:3129
 rtnl_newlink+0x61/0x90 net/core/rtnetlink.c:3249
 rtnetlink_rcv_msg+0x34f/0x8f0 net/core/rtnetlink.c:5218
 netlink_rcv_skb+0x13c/0x380 net/netlink/af_netlink.c:2486
 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:5236
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x43b/0x640 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x765/0xc40 net/netlink/af_netlink.c:1926
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xb5/0xf0 net/socket.c:671
 ___sys_sendmsg+0x647/0x950 net/socket.c:2292
 __sys_sendmsg+0xd9/0x180 net/socket.c:2330
 __do_sys_sendmsg net/socket.c:2339 [inline]
 __se_sys_sendmsg net/socket.c:2337 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2337
 do_syscall_64+0xd0/0x530 arch/x86/entry/common.c:301
 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:00007f54e527ec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f54e527f6d4 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009ca R14: 00000000004cb3bb R15: 000000000075bf2c
Modules linked in:
---[ end trace a9345e30b13e2d38 ]---
RIP: 0010:inet6_set_link_af+0x576/0x980 net/ipv6/addrconf.c:5735
Code: 07 38 d0 7f 08 84 c0 0f 85 aa 02 00 00 48 8d bb b0 02 00 00 45 0f b6 6d 04 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e a5 02 00 00 44 89 ab b0 02 00
RSP: 0018:ffff888084f3ee20 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000056 RSI: 0000000000000000 RDI: 00000000000002b0
RBP: ffff888084f3ef50 R08: 0000000000000005 R09: ffff888084f3eea0
R10: dffffc0000000000 R11: 1ffff110109e7dad R12: 1ffff110109e7dc8
R13: 0000000000000000 R14: 000000000000000c R15: ffff88808c3b4024
FS:  00007f54e527f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561850950af8 CR3: 0000000096746000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400