------------[ cut here ]------------
Trying to vfree() nonexistent vm area (0000000031d2b0f4)
WARNING: CPU: 0 PID: 19081 at mm/vmalloc.c:1515 __vunmap+0x332/0x3f0 mm/vmalloc.c:1515
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 19081 Comm: syz-executor.1 Not tainted 4.19.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:__vunmap+0x332/0x3f0 mm/vmalloc.c:1515
Code: b3 d1 ff 4c 89 e6 48 c7 c7 40 dc 72 88 e8 36 a2 60 06 0f 0b eb 94 e8 3d b3 d1 ff 4c 89 e6 48 c7 c7 a0 dc 72 88 e8 1e a2 60 06 <0f> 0b e9 79 ff ff ff 4c 89 ff e8 5f 74 07 00 e9 25 ff ff ff 48 8b
RSP: 0018:ffff888036547538 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 000000000001ad51 RSI: ffffffff814dddb1 RDI: ffffed1006ca8e99
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffffc90013099000
R13: fffffbfff164dc4e R14: 0000607f45c31f40 R15: ffffe8ffffc31f40
 vfree+0x65/0x100 mm/vmalloc.c:1598
 ipcomp_free_scratches+0xba/0x140 net/xfrm/xfrm_ipcomp.c:216
 ipcomp_free_data net/xfrm/xfrm_ipcomp.c:325 [inline]
 ipcomp_init_state+0x768/0xa00 net/xfrm/xfrm_ipcomp.c:377
 ipcomp6_init_state+0xc2/0x5b0 net/ipv6/ipcomp6.c:165
 __xfrm_init_state+0x555/0xd30 net/xfrm/xfrm_state.c:2348
 xfrm_init_state+0x1a/0x70 net/xfrm/xfrm_state.c:2374
 pfkey_msg2xfrm_state net/key/af_key.c:1297 [inline]
 pfkey_add+0x196f/0x2fc0 net/key/af_key.c:1514
 pfkey_process+0x66d/0x790 net/key/af_key.c:2847
 pfkey_sendmsg+0x40d/0x7d0 net/key/af_key.c:3686
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:632
 ___sys_sendmsg+0x3b3/0x8e0 net/socket.c:2115
 __sys_sendmmsg+0x195/0x470 net/socket.c:2210
 __do_sys_sendmmsg net/socket.c:2239 [inline]
 __se_sys_sendmmsg net/socket.c:2236 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2236
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x466459
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007eff2b332188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000393 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffe9ea8be7f R14: 00007eff2b332300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..