BUG: unable to handle kernel NULL pointer dereference at (null)
IP: addrconf_permanent_addr net/ipv6/addrconf.c:3351 [inline]
IP: addrconf_notify+0x7df/0xd50 net/ipv6/addrconf.c:3422
PGD 1faffb067 P4D 1faffb067 PUD 1fc449067 PMD 0
Oops: 0000 [#1] SMP
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 4852 Comm: syz-executor3 Not tainted 4.15.0-rc3-next-20171214+ #67
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:addrconf_permanent_addr net/ipv6/addrconf.c:3351 [inline]
RIP: 0010:addrconf_notify+0x7df/0xd50 net/ipv6/addrconf.c:3422
RSP: 0018:ffffc90000e27b70 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8801f8fb4000 RCX: ffff8801fae21c08
RDX: 00000000000000ff RSI: 000000002811d9a2 RDI: ffff8801fae21d68
RBP: ffffc90000e27bf0 R08: 0000000000000001 R09: 0000000000000004
R10: ffffc90000e27ae0 R11: 0000000000000004 R12: 0000000000000001
R13: ffff8801fae21c00 R14: 0000000000000000 R15: ffff8801fae21c00
FS: 00007f3658250700(0000) GS:ffff88021fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001f8f4b005 CR4: 00000000001606f0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
notifier_call_chain+0x41/0xc0 kernel/notifier.c:93
__raw_notifier_call_chain kernel/notifier.c:394 [inline]
raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
call_netdevice_notifiers_info+0x32/0x60 net/core/dev.c:1679
call_netdevice_notifiers net/core/dev.c:1697 [inline]
__dev_notify_flags+0x75/0x130 net/core/dev.c:6874
dev_change_flags+0x5e/0x70 net/core/dev.c:6910
dev_ifsioc+0x3c2/0x520 net/core/dev_ioctl.c:257
dev_ioctl+0x15d/0x7a0 net/core/dev_ioctl.c:566
sock_do_ioctl+0x59/0x60 net/socket.c:971
sock_ioctl+0x211/0x320 net/socket.c:1061
vfs_ioctl fs/ioctl.c:46 [inline]
do_vfs_ioctl+0xaf/0x840 fs/ioctl.c:686
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
entry_SYSCALL_64_fastpath+0x1f/0x96
RIP: 0033:0x452a09
RSP: 002b:00007f365824fc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452a09
RDX: 0000000020cf5fe0 RSI: 0000000000008914 RDI: 0000000000000013
RBP: 000000000000055e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f5170
R13: 00000000ffffffff R14: 00007f36582506d4 R15: 0000000000000000
Code: 85 ed 0f 84 f4 00 00 00 e8 ff 3a 06 ff 49 8d 85 68 01 00 00 48 89 c7 48 89 45 a8 e8 0c 9f 37 00 49 8b 45 08 4c 89 e9 48 83 c1 08 <48> 8b 38 48 39 c1 4c 8d a8 c8 fe ff ff 4c 8d a7 c8 fe ff ff 0f
RIP: addrconf_permanent_addr net/ipv6/addrconf.c:3351 [inline] RSP: ffffc90000e27b70
RIP: addrconf_notify+0x7df/0xd50 net/ipv6/addrconf.c:3422 RSP: ffffc90000e27b70
CR2: 0000000000000000
---[ end trace 201a5e2ca3cbcbd5 ]---