------------[ cut here ]------------ kernel BUG at include/linux/skbuff.h:2150! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 13706 Comm: syz-executor.2 Not tainted 4.14.299-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 task: ffff8880a8e7c200 task.stack: ffff8880398e0000 RIP: 0010:__skb_pull include/linux/skbuff.h:2150 [inline] RIP: 0010:skb_pull_inline include/linux/skbuff.h:2156 [inline] RIP: 0010:skb_pull net/core/skbuff.c:1745 [inline] RIP: 0010:skb_pull+0xe1/0x100 net/core/skbuff.c:1743 RSP: 0018:ffff8880398e75d8 EFLAGS: 00010216 RAX: 0000000000040000 RBX: ffff8880b50ef2c0 RCX: ffffc9000962d000 RDX: 0000000000000437 RSI: ffffffff85bf49b1 RDI: ffff8880b50ef344 RBP: 0000000000000018 R08: 00000000000000c0 R09: ffffed10169dff11 R10: ffff8880b4eff88f R11: 0000000000000000 R12: 00000000000010de R13: ffff8880b50ef398 R14: ffff8880b50ef390 R15: ffff8880b4eff820 FS: 00007fbbf3898700(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000000 CR3: 000000009f7ad000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ipgre_xmit+0x26f/0x780 net/ipv4/ip_gre.c:658 __netdev_start_xmit include/linux/netdevice.h:4054 [inline] netdev_start_xmit include/linux/netdevice.h:4063 [inline] xmit_one net/core/dev.c:3005 [inline] dev_hard_start_xmit+0x188/0x890 net/core/dev.c:3021 __dev_queue_xmit+0x1d7f/0x2480 net/core/dev.c:3521 packet_snd+0x13aa/0x26f0 net/packet/af_packet.c:3032 packet_sendmsg+0x12ed/0x33a0 net/packet/af_packet.c:3061 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 Code: 00 00 4c 89 a3 d8 00 00 00 e8 2c 0e 96 fb 4c 89 e0 5b 5d 41 5c c3 e8 1f 0e 96 fb 45 31 e4 5b 4c 89 e0 5d 41 5c c3 e8 0f 0e 96 fb <0f> 0b e8 58 cb bf fb e9 49 ff ff ff e8 4e cb bf fb eb 8e e8 b7 RIP: __skb_pull include/linux/skbuff.h:2150 [inline] RSP: ffff8880398e75d8 RIP: skb_pull_inline include/linux/skbuff.h:2156 [inline] RSP: ffff8880398e75d8 RIP: skb_pull net/core/skbuff.c:1745 [inline] RSP: ffff8880398e75d8 RIP: skb_pull+0xe1/0x100 net/core/skbuff.c:1743 RSP: ffff8880398e75d8 ---[ end trace ac17529e998b038c ]---