netlink: 'syz.2.15': attribute type 4 has an invalid length. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 3852 at net/core/skbuff.c:1219 __sk_skb_reason_drop net/core/skbuff.c:1216 [inline] WARNING: CPU: 1 PID: 3852 at net/core/skbuff.c:1219 sk_skb_reason_drop+0x32/0x120 net/core/skbuff.c:1241 Modules linked in: CPU: 1 UID: 0 PID: 3852 Comm: syz.2.15 Not tainted 6.12.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:__sk_skb_reason_drop net/core/skbuff.c:1216 [inline] RIP: 0010:sk_skb_reason_drop+0x32/0x120 net/core/skbuff.c:1241 Code: 74 2f 48 89 f3 b8 ff ff ff ff f0 0f c1 86 d4 00 00 00 83 f8 01 75 18 89 d1 49 89 f8 8d 81 00 00 fc ff 3d 00 00 fc ff 77 0e 90 <0f> 0b 90 eb 1c 7c 54 5b c3 cc cc cc cc 83 f9 01 75 0f 48 8b 74 24 RSP: 0018:ffffc90001383878 EFLAGS: 00010283 RAX: 00000000fffbffea RBX: ffff888114e20100 RCX: 00000000ffffffea RDX: 00000000ffffffea RSI: ffff888114e20100 RDI: 0000000000000000 RBP: 00000000ffffffea R08: 0000000000000000 R09: ffffc90001383818 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90001383968 R13: ffff888114e20100 R14: ffff888107ad7000 R15: ffff8881191f0000 FS: 00007fcdfb9ef6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000011b484000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kfree_skb_reason include/linux/skbuff.h:1263 [inline] ip_rcv_finish_core+0x220/0x480 net/ipv4/ip_input.c:425 ip_list_rcv_finish net/ipv4/ip_input.c:611 [inline] ip_sublist_rcv+0xa5/0x250 net/ipv4/ip_input.c:637 ip_list_rcv+0x14d/0x180 net/ipv4/ip_input.c:671 __netif_receive_skb_list_ptype net/core/dev.c:5715 [inline] __netif_receive_skb_list_core+0x2b3/0x2d0 net/core/dev.c:5762 __netif_receive_skb_list net/core/dev.c:5814 [inline] netif_receive_skb_list_internal+0x234/0x310 net/core/dev.c:5905 netif_receive_skb_list+0x1c/0x190 net/core/dev.c:5957 xdp_recv_frames net/bpf/test_run.c:280 [inline] xdp_test_run_batch net/bpf/test_run.c:361 [inline] bpf_test_run_xdp_live+0x8e3/0xa90 net/bpf/test_run.c:390 bpf_prog_test_run_xdp+0x2d1/0x4b0 net/bpf/test_run.c:1318 bpf_prog_test_run+0xdf/0x100 kernel/bpf/syscall.c:4266 __sys_bpf+0x2ff/0x5a0 kernel/bpf/syscall.c:5671 __do_sys_bpf kernel/bpf/syscall.c:5760 [inline] __se_sys_bpf kernel/bpf/syscall.c:5758 [inline] __x64_sys_bpf+0x17/0x20 kernel/bpf/syscall.c:5758 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xe0/0x220 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcdfbf6e719 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:00007fcdfb9ef038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fcdfc125f80 RCX: 00007fcdfbf6e719 RDX: 0000000000000048 RSI: 0000000020000600 RDI: 000000000000000a RBP: 00007fcdfbfe1616 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fcdfc125f80 R15: 00007ffcd346c1c8