------------[ cut here ]------------ skb_assert_len WARNING: ./include/linux/skbuff.h:2753 at skb_assert_len include/linux/skbuff.h:2753 [inline], CPU#0: syz.2.258/5777 WARNING: ./include/linux/skbuff.h:2753 at __dev_queue_xmit+0x18ec/0x2bc0 net/core/dev.c:4781, CPU#0: syz.2.258/5777 Modules linked in: CPU: 0 UID: 0 PID: 5777 Comm: syz.2.258 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : skb_assert_len include/linux/skbuff.h:2753 [inline] pc : __dev_queue_xmit+0x18ec/0x2bc0 net/core/dev.c:4781 lr : skb_assert_len include/linux/skbuff.h:2753 [inline] lr : __dev_queue_xmit+0x18ec/0x2bc0 net/core/dev.c:4781 sp : ffff80009b3174c0 x29: ffff80009b317710 x28: 1fffe00019d6c7c6 x27: dfff800000000000 x26: ffff700013662eb0 x25: 1fffe00019d6c7d2 x24: ffff0000ceb63e30 x23: ffff0000cebc8000 x22: 1fffe00019d6c7ba x21: ffff80008a188000 x20: ffff0000ceb63dc0 x19: ffff0000ceb63dd0 x18: 00000000ffffffff x17: ffff80008a7c2000 x16: 0000000000000002 x15: ffff800084bf2048 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000080000 x9 : cd9c36d9dcc25000 x8 : cd9c36d9dcc25000 x7 : ffff80008048e8f8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000802f8870 x2 : 0000000100000000 x1 : ffff0000d546d7c0 x0 : 0000000000000001 Call trace: skb_assert_len include/linux/skbuff.h:2753 [inline] (P) __dev_queue_xmit+0x18ec/0x2bc0 net/core/dev.c:4781 (P) dev_queue_xmit include/linux/netdevice.h:3446 [inline] packet_xmit+0x6c/0x314 net/packet/af_packet.c:276 tpacket_snd net/packet/af_packet.c:2886 [inline] packet_sendmsg+0x1a14/0x4110 net/packet/af_packet.c:3112 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg+0xc8/0x17c net/socket.c:790 __sys_sendto+0x250/0x328 net/socket.c:2252 __do_sys_sendto net/socket.c:2259 [inline] __se_sys_sendto net/socket.c:2255 [inline] __arm64_sys_sendto+0xec/0x10c net/socket.c:2255 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:738 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:757 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 irq event stamp: 722 hardirqs last enabled at (721): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (721): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (722): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:425 softirqs last enabled at (702): [] __alloc_skb+0x1c0/0x610 net/core/skbuff.c:698 softirqs last disabled at (698): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (698): [] __alloc_skb+0x1a8/0x610 net/core/skbuff.c:697 ---[ end trace 0000000000000000 ]--- skb len=0 data_len=0 headroom=144 headlen=0 tailroom=240 end-tail=240 mac=(144,0) mac_len=0 net=(144,-1) trans=-1 shinfo(txflags=0 nr_frags=0 gso(size=0 type=0 segs=0)) csum(0x0 start=0 offset=0 ip_summed=0 complete_sw=0 valid=0 level=0) hash(0x0 sw=0 l4=0) proto=0x0010 pkttype=0 iif=0 priority=0x0 mark=0x0 alloc_cpu=0 vlan_all=0x0 encapsulation=0 inner(proto=0x0000, mac=0, net=0, trans=0) dev name=wg0 feat=0x0000010e401d4829 sk family=17 type=3 proto=0