WARNING: CPU: 0 PID: 2985 at mm/slab_common.c:970 kmalloc_slab+0x5d/0x70 mm/slab_common.c:970
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 2985 Comm: syzkaller163645 Not tainted 4.14.0-rc4+ #37
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x417 kernel/panic.c:181
 __warn+0x1c4/0x1d9 kernel/panic.c:542
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178
 do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:261
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:kmalloc_slab+0x5d/0x70 mm/slab_common.c:970
RSP: 0018:ffff8801ce757310 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8801ce7575a8 RCX: 0000000000000007
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffffffff
RBP: ffff8801ce757310 R08: ffff8801d7fd38c0 R09: ffff8801ce757970
R10: ffff8801ceb60180 R11: 0000000000000000 R12: ffff8801ce757910
R13: ffff8801ce757970 R14: 00000000014080c0 R15: ffff8801d06d07c0
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x25/0x760 mm/slab.c:3734
 kmalloc include/linux/slab.h:498 [inline]
 kzalloc include/linux/slab.h:666 [inline]
 ip6_setup_cork+0x1e8/0x15c0 net/ipv6/ip6_output.c:1164
 ip6_make_skb+0x282/0x530 net/ipv6/ip6_output.c:1729
 udpv6_sendmsg+0x2769/0x3380 net/ipv6/udp.c:1340
 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:633 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:643
 SYSC_sendto+0x358/0x5a0 net/socket.c:1750
 SyS_sendto+0x40/0x50 net/socket.c:1718
 do_syscall_32_irqs_on arch/x86/entry/common.c:329 [inline]
 do_fast_syscall_32+0x3f2/0xf05 arch/x86/entry/common.c:391
 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124
RIP: 0023:0xf7f98c79
RSP: 002b:00000000ff92ac9c EFLAGS: 00000282 ORIG_RAX: 0000000000000171
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020fd1000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020e0afe4
RBP: 000000000000001c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..