R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b798c
R13: 00007f11dde2bbc8 R14: 00000000004b798c R15: 0000000000000000
BUG: unable to handle kernel paging request at ffffffff0003fcd6
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:183
PGD 6825067 P4D 6825067 PUD 0 
Oops: 0002 [#1] SMP KASAN
Dumping ftrace buffer:
   (ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 26010 Comm: syz-executor4 Not tainted 4.15.0-rc7+ #261
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:183
RSP: 0018:ffff88019182f428 EFLAGS: 00010246
RAX: 0000000000010000 RBX: ffff88019182f5b0 RCX: 00000000ffffffff
RDX: 0000000000010000 RSI: ffffc90003a75000 RDI: ffffffff0003fc56
RBP: ffff88019182f438 R08: ffff8801db227d00 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff0003fc56
R13: ffffffff0003fc56 R14: ffff88019182f4d8 R15: ffff88019182f658
FS:  00007f11dde2c700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff0003fcd6 CR3: 00000001c8cd2001 CR4: 00000000001606f0
Call Trace:
 ip6_cork_release.isra.42+0x1bb/0x2c0 net/ipv6/ip6_output.c:1579
 ip6_make_skb+0x4f1/0x5a0 net/ipv6/ip6_output.c:1739
 udpv6_sendmsg+0x27fc/0x3400 net/ipv6/udp.c:1340
 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763
 sock_sendmsg_nosec net/socket.c:638 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:648
 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2028
 __sys_sendmsg+0xe5/0x210 net/socket.c:2062
 SYSC_sendmsg net/socket.c:2073 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2069
 entry_SYSCALL_64_fastpath+0x23/0x9a
RIP: 0033:0x452cf9
RSP: 002b:00007f11dde2bc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f11dde2baa0 RCX: 0000000000452cf9
RDX: 0000000000000000 RSI: 0000000020238fc8 RDI: 0000000000000014
RBP: 00007f11dde2ba90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b798c
R13: 00007f11dde2bbc8 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 21 7e 35 fd 4d 85 e4 74 24 e8 17 7e 35 fd b9 ff ff ff ff <f0> 41 0f c1 8c 24 80 00 00 00 89 cb 83 eb 01 78 33 e8 fc 7d 35 
RIP: atomic_add_return arch/x86/include/asm/atomic.h:157 [inline] RSP: ffff88019182f428
RIP: atomic_sub_return arch/x86/include/asm/atomic.h:169 [inline] RSP: ffff88019182f428
RIP: dst_release+0x1e/0x90 net/core/dst.c:183 RSP: ffff88019182f428
CR2: ffffffff0003fcd6
---[ end trace 043c80418b19cc65 ]---