------------[ cut here ]------------ WARNING: CPU: 1 PID: 339 at include/linux/skbuff.h:2824 pskb_may_pull_reason include/linux/skbuff.h:2824 [inline] WARNING: CPU: 1 PID: 339 at include/linux/skbuff.h:2824 pskb_may_pull include/linux/skbuff.h:2840 [inline] WARNING: CPU: 1 PID: 339 at include/linux/skbuff.h:2824 pskb_network_may_pull include/linux/skbuff.h:3199 [inline] WARNING: CPU: 1 PID: 339 at include/linux/skbuff.h:2824 pskb_inet_may_pull include/net/ip_tunnels.h:466 [inline] WARNING: CPU: 1 PID: 339 at include/linux/skbuff.h:2824 ip6gre_tunnel_xmit+0x1096/0x1440 net/ipv6/ip6_gre.c:913 Modules linked in: CPU: 1 UID: 0 PID: 339 Comm: syz.3.9 Not tainted syzkaller #0 2456bfd0916d80188827445f664284f1a044436b Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:pskb_may_pull_reason include/linux/skbuff.h:2824 [inline] RIP: 0010:pskb_may_pull include/linux/skbuff.h:2840 [inline] RIP: 0010:pskb_network_may_pull include/linux/skbuff.h:3199 [inline] RIP: 0010:pskb_inet_may_pull include/net/ip_tunnels.h:466 [inline] RIP: 0010:ip6gre_tunnel_xmit+0x1096/0x1440 net/ipv6/ip6_gre.c:913 Code: 56 01 00 e9 91 fc ff ff e8 77 cf 78 fc e9 87 fc ff ff e8 6d cf 78 fc 48 8b 44 24 08 c6 40 3a f8 e9 e8 f6 ff ff e8 5a cf 78 fc <0f> 0b e9 39 f1 ff ff 89 df 44 89 ee e8 09 d1 78 fc 44 39 eb 0f 87 RSP: 0018:ffffc9000c0774e0 EFLAGS: 00010287 RAX: ffffffff850ea266 RBX: 00000000ffffffc0 RCX: 0000000000080000 RDX: ffffc90001e43000 RSI: 0000000000000073 RDI: 0000000000000074 RBP: ffffc9000c0777a0 R08: ffff88810c3ccc00 R09: 0000000000000002 R10: 0000000000000000 R11: ffffffff850e91d0 R12: dffffc0000000000 R13: ffff888113b90c80 R14: 0000000000000000 R15: ffff888113b90d68 FS: 00007f70469b16c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7045b88f40 CR3: 000000010bf5a000 CR4: 00000000003526b0 Call Trace: __netdev_start_xmit include/linux/netdevice.h:5008 [inline] netdev_start_xmit include/linux/netdevice.h:5017 [inline] __dev_direct_xmit+0x395/0x5a0 net/core/dev.c:4614 __xsk_generic_xmit net/xdp/xsk.c:826 [inline] xsk_generic_xmit+0x1bef/0x3060 net/xdp/xsk.c:868 __xsk_sendmsg net/xdp/xsk.c:925 [inline] xsk_sendmsg+0x532/0x8a0 net/xdp/xsk.c:935 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x9a1/0xa00 net/socket.c:2609 ___sys_sendmsg+0x2a6/0x370 net/socket.c:2663 __sys_sendmsg net/socket.c:2692 [inline] __do_sys_sendmsg net/socket.c:2701 [inline] __se_sys_sendmsg net/socket.c:2699 [inline] __x64_sys_sendmsg+0x206/0x2e0 net/socket.c:2699 x64_sys_call+0x2a4c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/common.c:47 [inline] do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f7045b9e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f70469b1028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f7045e25fa0 RCX: 00007f7045b9e0d9 RDX: 0000000000000040 RSI: 0000200000000700 RDI: 0000000000000003 RBP: 00007f7045c35024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7045e26038 R14: 00007f7045e25fa0 R15: 00007ffd666c21a8 ---[ end trace 0000000000000000 ]---