skbuff: skb_under_panic: text:ffff800010d79ba8 len:-32748 put:-32748 head:ffff0000d0fc6400 data:fffeffffd0fce4ac tail:0xc0 end:0xc0 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:120! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4227 Comm: syz-executor330 Not tainted 6.1.62-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : skb_panic net/core/skbuff.c:116 [inline] pc : skb_under_panic+0x13c/0x140 net/core/skbuff.c:130 lr : skb_panic net/core/skbuff.c:116 [inline] lr : skb_under_panic+0x13c/0x140 net/core/skbuff.c:130 sp : ffff80001ddd74b0 x29: ffff80001ddd74c0 x28: 1ffff00003bbaf08 x27: dfff800000000000 x26: ffff0000d2526dd0 x25: 00000000000000c0 x24: fffeffffd0fce4ac x23: ffff0000d0fc6400 x22: 00000000ffff8014 x21: 00000000000000c0 x20: 00000000ffff8014 x19: ffff800010d79ba8 x18: 1fffe000368ac776 x17: ffff80001580d000 x16: ffff80001213551c x15: ffff0001b4563bbc x14: 1ffff00002b020b0 x13: dfff800000000000 x12: 0000000000000001 x11: ff80800008346830 x10: 0000000000000000 x9 : e7cdc4ce9e931400 x8 : e7cdc4ce9e931400 x7 : ffff80000827db78 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff80000858a904 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000008e Call trace: skb_panic net/core/skbuff.c:116 [inline] skb_under_panic+0x13c/0x140 net/core/skbuff.c:130 skb_push+0x104/0x11c net/core/skbuff.c:2180 ipgre_header+0x78/0x3c4 net/ipv4/ip_gre.c:852 dev_hard_header include/linux/netdevice.h:3073 [inline] packet_snd net/packet/af_packet.c:3028 [inline] packet_sendmsg+0x3068/0x4ce0 net/packet/af_packet.c:3108 sock_sendmsg_nosec net/socket.c:716 [inline] __sock_sendmsg net/socket.c:728 [inline] ____sys_sendmsg+0x558/0x844 net/socket.c:2499 ___sys_sendmsg net/socket.c:2553 [inline] __sys_sendmsg+0x26c/0x33c net/socket.c:2582 __do_sys_sendmsg net/socket.c:2591 [inline] __se_sys_sendmsg net/socket.c:2589 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2589 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Code: aa1803e6 aa1903e7 a90023f5 94754276 (d4210000) ---[ end trace 0000000000000000 ]---