------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:211! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 6578 Comm: syz-executor.0 Not tainted 6.16.0-syzkaller-g4b290aae788e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:211 Code: b6 04 01 84 c0 74 04 3c 03 7e 21 41 56 8b 4b 70 45 89 e8 48 c7 c7 20 70 e1 8c 41 57 56 48 89 ee 52 4c 89 e2 e8 da 6c 3e f8 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 94 fb c4 f8 4c RSP: 0018:ffffc90004f9f7f8 EFLAGS: 00010286 RAX: 0000000000000099 RBX: ffff88807b431a00 RCX: ffffffff819a6d19 RDX: 0000000000000000 RSI: ffffffff819aeba6 RDI: 0000000000000005 RBP: ffffffff8ce18320 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffffffff8a174818 R13: 0000000095dc6c74 R14: ffffffff8ce16fe0 R15: 0000000000000180 FS: 00007f920fe596c0(0000) GS:ffff888124822000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f920fe59d58 CR3: 0000000075e6e000 CR4: 00000000003526f0 Call Trace: skb_under_panic net/core/skbuff.c:221 [inline] skb_push+0xca/0xf0 net/core/skbuff.c:2602 ipgre_header+0x68/0x530 net/ipv4/ip_gre.c:895 dev_hard_header include/linux/netdevice.h:3407 [inline] packet_snd net/packet/af_packet.c:3082 [inline] packet_sendmsg+0x4088/0x5850 net/packet/af_packet.c:3162 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg net/socket.c:727 [inline] ____sys_sendmsg+0xa98/0xc70 net/socket.c:2612 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2666 __sys_sendmsg+0x16d/0x220 net/socket.c:2698 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f920f07bdb9 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f920fe590c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f920f19c120 RCX: 00007f920f07bdb9 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000004 RBP: 00007f920f0d8ad0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f920f19c120 R15: 00007ffd17f03158 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:211 Code: b6 04 01 84 c0 74 04 3c 03 7e 21 41 56 8b 4b 70 45 89 e8 48 c7 c7 20 70 e1 8c 41 57 56 48 89 ee 52 4c 89 e2 e8 da 6c 3e f8 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 94 fb c4 f8 4c RSP: 0018:ffffc90004f9f7f8 EFLAGS: 00010286 RAX: 0000000000000099 RBX: ffff88807b431a00 RCX: ffffffff819a6d19 RDX: 0000000000000000 RSI: ffffffff819aeba6 RDI: 0000000000000005 RBP: ffffffff8ce18320 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffffffff8a174818 R13: 0000000095dc6c74 R14: ffffffff8ce16fe0 R15: 0000000000000180 FS: 00007f920fe596c0(0000) GS:ffff888124822000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000560cc3cb0fb0 CR3: 0000000075e6e000 CR4: 00000000003526f0