------------[ cut here ]------------ Trying to vfree() nonexistent vm area (ffffc90002d91000) WARNING: CPU: 1 PID: 14870 at mm/vmalloc.c:2601 __vunmap+0x150/0xb70 mm/vmalloc.c:2601 Modules linked in: CPU: 1 PID: 14870 Comm: syz-executor.3 Not tainted 5.15.0-rc3-next-20210927-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__vunmap+0x150/0xb70 mm/vmalloc.c:2601 Code: 85 78 ff ff ff e8 a0 99 c4 ff 48 c7 c7 c0 d9 a9 8b e8 d4 78 83 07 e8 8f 99 c4 ff 4c 89 e6 48 c7 c7 20 17 97 89 e8 3e 49 3e 07 <0f> 0b 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e 41 5f e9 6b 99 c4 ff e8 RSP: 0018:ffffc90003fb72d8 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815ddf78 RDI: fffff520007f6e4d RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815d7d5e R11: 0000000000000000 R12: ffffc90002d91000 R13: ffff8880187c6000 R14: ffffc90002d91000 R15: ffffe8ffffc73878 FS: 00007f7657340700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556e84708 CR3: 000000007601e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __vfree+0x3c/0xd0 mm/vmalloc.c:2669 vfree+0x5a/0x90 mm/vmalloc.c:2700 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 ipcomp4_init_state+0xc2/0x8e0 net/ipv4/ipcomp.c:135 __xfrm_init_state+0x995/0x15c0 net/xfrm/xfrm_state.c:2648 xfrm_state_construct net/xfrm/xfrm_user.c:627 [inline] xfrm_add_sa+0x1ef7/0x3600 net/xfrm/xfrm_user.c:684 xfrm_user_rcv_msg+0x430/0xa20 net/xfrm/xfrm_user.c:2912 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504 xfrm_netlink_rcv+0x6b/0x90 net/xfrm/xfrm_user.c:2934 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x86d/0xdb0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:724 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f7659dea709 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:00007f7657340188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f7659eef020 RCX: 00007f7659dea709 RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000004 RBP: 00007f7659e44cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff926ab23f R14: 00007f7657340300 R15: 0000000000022000