------------[ cut here ]------------
Trying to vfree() nonexistent vm area (ffffc90001b21000)
WARNING: CPU: 1 PID: 16033 at mm/vmalloc.c:2546 __vunmap+0x150/0xb60 mm/vmalloc.c:2546
Modules linked in:
CPU: 1 PID: 16033 Comm: syz-executor.2 Not tainted 5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__vunmap+0x150/0xb60 mm/vmalloc.c:2546
Code: 85 78 ff ff ff e8 90 72 c5 ff 48 c7 c7 20 3f 09 8c e8 94 9a 69 07 e8 7f 72 c5 ff 4c 89 e6 48 c7 c7 20 7b 76 89 e8 c3 9b 25 07 <0f> 0b 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e 41 5f e9 5b 72 c5 ff e8
RSP: 0018:ffffc900028d7480 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815ccd65 RDI: fffff5200051ae82
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815c6bce R11: 0000000000000000 R12: ffffc90001b21000
R13: ffff888018180f00 R14: ffffc90001b21000 R15: ffffe8ffffc8f590
FS:  00007f06d3b1d700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007eff517c5718 CR3: 000000003646a000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __vfree+0x3c/0xd0 mm/vmalloc.c:2613
 vfree+0x5a/0x90 mm/vmalloc.c:2644
 ipcomp_free_scratches+0xc4/0x160 net/xfrm/xfrm_ipcomp.c:203
 ipcomp_free_data net/xfrm/xfrm_ipcomp.c:312 [inline]
 ipcomp_init_state+0x77c/0xa40 net/xfrm/xfrm_ipcomp.c:364
 ipcomp6_init_state+0xc2/0x700 net/ipv6/ipcomp6.c:154
 __xfrm_init_state+0x9c8/0x15b0 net/xfrm/xfrm_state.c:2606
 xfrm_init_state+0x1a/0x70 net/xfrm/xfrm_state.c:2633
 pfkey_msg2xfrm_state net/key/af_key.c:1291 [inline]
 pfkey_add+0x1a64/0x2cd0 net/key/af_key.c:1508
 pfkey_process+0x685/0x7e0 net/key/af_key.c:2841
 pfkey_sendmsg+0x42d/0x800 net/key/af_key.c:3680
 sock_sendmsg_nosec net/socket.c:654 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:674
 ____sys_sendmsg+0x331/0x810 net/socket.c:2350
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404
 __sys_sendmmsg+0x195/0x470 net/socket.c:2490
 __do_sys_sendmmsg net/socket.c:2519 [inline]
 __se_sys_sendmmsg net/socket.c:2516 [inline]
 __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2516
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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:00007f06d3b1d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000393 RSI: 0000000020000180 RDI: 0000000000000004
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffe10b4003f R14: 00007f06d3b1d300 R15: 0000000000022000