netlink: 'syz.0.2007': attribute type 29 has an invalid length.
netlink: 'syz.0.2007': attribute type 29 has an invalid length.
==================================================================
BUG: KFENCE: use-after-free read in xfrm_alloc_spi+0x3b9/0xf30

Use-after-free read at 0xffff88813643c0c4 (in kfence-#29):
 xfrm_alloc_spi+0x3b9/0xf30
 xfrm_alloc_userspi+0x70b/0xc90
 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

kfence-#29: 0xffff88813643cf00-0xffff88813643cfef, size=240, cache=skbuff_head_cache

allocated by task 13401 on cpu 0 at 230.217317s (2.966508s ago):
 bpf_test_run_xdp_live+0x15f1/0x1b10
 bpf_prog_test_run_xdp+0x713/0x1000
 bpf_prog_test_run+0x2c7/0x340
 __sys_bpf+0x581/0x870
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

freed by task 13401 on cpu 0 at 230.217610s (2.985532s ago):
 do_xdp_generic+0xb79/0x11a0
 __netif_receive_skb_core+0x17f9/0x4020
 __netif_receive_skb_list_core+0x23f/0x800
 netif_receive_skb_list_internal+0x96f/0xcb0
 netif_receive_skb_list+0x54/0x450
 bpf_test_run_xdp_live+0x1786/0x1b10
 bpf_prog_test_run_xdp+0x713/0x1000
 bpf_prog_test_run+0x2c7/0x340
 __sys_bpf+0x581/0x870
 __x64_sys_bpf+0x7c/0x90
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 13516 Comm: syz.0.2007 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_alloc_spi+0x3b9/0xf30
Code: c1 08 c1 74 0a e8 87 1e 9c f7 e9 14 02 00 00 49 8d 9d c4 00 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 9f 01 00 00 <8b> 1b 89 df 44 89 f6 e8 1b 20 9c f7 44 39 f3 0f 85 df 00 00 00 49
RSP: 0018:ffffc9000298f0e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88813643c0c4 RCX: 0000000000080000
RDX: ffffc90003b71000 RSI: 00000000000001f7 RDI: 00000000000001f8
RBP: ffffc9000298f230 R08: 0000000000000000 R09: ffffffff8a238e10
R10: dffffc0000000000 R11: fffff52000531e0c R12: dffffc0000000000
R13: ffff88813643c000 R14: 0000000003000000 R15: ffffc9000298f6a0
FS:  00007f73a08466c0(0000) GS:ffff8880b863d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88813643c0c4 CR3: 0000000028336000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 xfrm_alloc_userspi+0x70b/0xc90
 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: 0033:0x7f739f98ec29
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:00007f73a0846038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f739fbd5fa0 RCX: 00007f739f98ec29
RDX: 0000000000000000 RSI: 0000200000000840 RDI: 000000000000000a
RBP: 00007f739fa11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f739fbd6038 R14: 00007f739fbd5fa0 R15: 00007ffd0609c2b8
 </TASK>
==================================================================
