RAX: ffffffffffffffda RBX: 00007faaf6b63aa0 RCX: 0000000000452cf9
RDX: 0000000000000561 RSI: 0000000020d2aa85 RDI: 0000000000000013
RBP: 00007faaf6b63a90 R08: 00000000204d4fe4 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b798c
R13: 00007faaf6b63bc8 R14: 00000000004b798c R15: 0000000000000000
BUG: unable to handle kernel paging request at ffffffff000644f6
IP: atomic_add_return arch/x86/include/asm/atomic.h:157 [inline]
IP: atomic_sub_return arch/x86/include/asm/atomic.h:169 [inline]
IP: dst_release+0x1e/0x90 net/core/dst.c:185
PGD 6825067 P4D 6825067 PUD 0 
Oops: 0002 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 7529 Comm: syz-executor6 Not tainted 4.15.0-rc7-next-20180112+ #96
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:atomic_add_return arch/x86/include/asm/atomic.h:157 [inline]
RIP: 0010:atomic_sub_return arch/x86/include/asm/atomic.h:169 [inline]
RIP: 0010:dst_release+0x1e/0x90 net/core/dst.c:185
RSP: 0018:ffff8801be0a7598 EFLAGS: 00010246
RAX: 0000000000010000 RBX: ffff8801be0a7720 RCX: 00000000ffffffff
RDX: 0000000000010000 RSI: ffffc90004367000 RDI: ffffffff000644b6
RBP: ffff8801be0a75a8 R08: ffffffff86941e80 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff000644b6
R13: ffffffff000644b6 R14: ffff8801be0a7648 R15: ffff8801be0a77c8
FS:  00007faaf6b64700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff000644f6 CR3: 00000001c360b001 CR4: 00000000001626f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ip6_cork_release.isra.43+0x1bb/0x2c0 net/ipv6/ip6_output.c:1588
 ip6_make_skb+0x4f1/0x5a0 net/ipv6/ip6_output.c:1748
 udpv6_sendmsg+0x27fc/0x3400 net/ipv6/udp.c:1310
 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:764
 sock_sendmsg_nosec net/socket.c:628 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:638
 SYSC_sendto+0x361/0x5c0 net/socket.c:1719
 SyS_sendto+0x40/0x50 net/socket.c:1687
 entry_SYSCALL_64_fastpath+0x29/0xa0
RIP: 0033:0x452cf9
RSP: 002b:00007faaf6b63c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007faaf6b63aa0 RCX: 0000000000452cf9
RDX: 0000000000000561 RSI: 0000000020d2aa85 RDI: 0000000000000013
RBP: 00007faaf6b63a90 R08: 00000000204d4fe4 R09: 000000000000001c
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b798c
R13: 00007faaf6b63bc8 R14: 00000000004b798c R15: 0000000000000000
Code: f7 ff 31 c0 5b 5d c3 66 0f 1f 44 00 00 55 48 89 e5 41 54 53 49 89 fc e8 b1 74 30 fd 4d 85 e4 74 21 e8 a7 74 30 fd b9 ff ff ff ff <f0> 41 0f c1 4c 24 40 89 cb 83 eb 01 78 33 e8 8f 74 30 fd 85 db 
RIP: atomic_add_return arch/x86/include/asm/atomic.h:157 [inline] RSP: ffff8801be0a7598
RIP: atomic_sub_return arch/x86/include/asm/atomic.h:169 [inline] RSP: ffff8801be0a7598
RIP: dst_release+0x1e/0x90 net/core/dst.c:185 RSP: ffff8801be0a7598
CR2: ffffffff000644f6
---[ end trace 3050670ae5a39871 ]---