Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 14719 Comm: syz.1.2252 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__xfrm_state_insert+0x1011/0x1450
Code: 18 00 74 08 4c 89 ef e8 3d b4 01 f8 4d 89 65 00 41 80 3c 1e 00 74 08 48 89 ef e8 3a b3 01 f8 4c 8b 75 00 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 11 b4 01 f8 4d 89 2e 41 80 3c 1f 00
RSP: 0018:ffffc90009c270e8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90003661000 RSI: 00000000000003fa RDI: 00000000000003fb
RBP: ffff88803a9a44b0 R08: ffff8880305b5640 R09: 0000000000000002
R10: 000000000000000a R11: 0000000000000002 R12: ffff88802e1e5fa8
R13: ffff88803a9a44a8 R14: 0000000000000000 R15: 1ffff11005c3cbf6
FS:  00007f71beb846c0(0000) GS:ffff8880b861a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32422ff8 CR3: 000000003a97a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 xfrm_state_insert+0x54/0x60
 ipcomp4_init_state+0x673/0xb20
 __xfrm_init_state+0xa76/0x13f0
 xfrm_add_sa+0x2f5b/0x4070
 xfrm_user_rcv_msg+0x7a3/0xab0
 netlink_rcv_skb+0x208/0x470
 xfrm_netlink_rcv+0x79/0x90
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f71bdd8ebe9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f71beb84038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f71bdfc5fa0 RCX: 00007f71bdd8ebe9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000005
RBP: 00007f71bde11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f71bdfc6038 R14: 00007f71bdfc5fa0 R15: 00007ffc9eba6a48
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__xfrm_state_insert+0x1011/0x1450
Code: 18 00 74 08 4c 89 ef e8 3d b4 01 f8 4d 89 65 00 41 80 3c 1e 00 74 08 48 89 ef e8 3a b3 01 f8 4c 8b 75 00 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 11 b4 01 f8 4d 89 2e 41 80 3c 1f 00
RSP: 0018:ffffc90009c270e8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90003661000 RSI: 00000000000003fa RDI: 00000000000003fb
RBP: ffff88803a9a44b0 R08: ffff8880305b5640 R09: 0000000000000002
R10: 000000000000000a R11: 0000000000000002 R12: ffff88802e1e5fa8
R13: ffff88803a9a44a8 R14: 0000000000000000 R15: 1ffff11005c3cbf6
FS:  00007f71beb846c0(0000) GS:ffff8880b861a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32422ff8 CR3: 000000003a97a000 CR4: 00000000000006f0
