WARNING: CPU: 1 PID: 2969 at mm/slab_common.c:971 kmalloc_slab+0x5d/0x70 mm/slab_common.c:971
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2969 Comm: syz-executor2 Not tainted 4.15.0-rc9+ #282
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:1096
RIP: 0010:kmalloc_slab+0x5d/0x70 mm/slab_common.c:971
RSP: 0018:ffff8801cd827440 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000000fffff88c RCX: ffffffff84afeb78
RDX: 0000000000000b4c RSI: 0000000000000000 RDI: 00000000fffff88c
RBP: ffff8801cd827440 R08: 0000000000000000 R09: 1ffff10039b04e4b
R10: ffff8801cd827190 R11: 0000000000000001 R12: 00000000fffff88c
R13: ffff8801cd8276e8 R14: 00000000014080c0 R15: ffff8801c7631240
 __do_kmalloc mm/slab.c:3703 [inline]
 __kmalloc+0x25/0x760 mm/slab.c:3717
 kmalloc include/linux/slab.h:504 [inline]
 kzalloc include/linux/slab.h:688 [inline]
 xfrm_alloc_replay_state_esn net/xfrm/xfrm_user.c:442 [inline]
 xfrm_state_construct net/xfrm/xfrm_user.c:601 [inline]
 xfrm_add_sa+0x1b15/0x3440 net/xfrm/xfrm_user.c:647
 xfrm_user_rcv_msg+0x422/0x860 net/xfrm/xfrm_user.c:2595
 netlink_rcv_skb+0x14b/0x380 net/netlink/af_netlink.c:2409
 xfrm_netlink_rcv+0x6f/0x90 net/xfrm/xfrm_user.c:2603
 netlink_unicast_kernel net/netlink/af_netlink.c:1275 [inline]
 netlink_unicast+0x4ee/0x700 net/netlink/af_netlink.c:1301
 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1864
 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+0x29/0xa0
RIP: 0033:0x452f19
RSP: 002b:00007f0524e62c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452f19
RDX: 0000000000000000 RSI: 000000002014f000 RDI: 0000000000000013
RBP: 00000000000005de R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f7d70
R13: 00000000ffffffff R14: 00007f0524e636d4 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..