[ 15.314664][ T3892] 8021q: adding VLAN 0 to HW filter on device bond0 [ 15.323529][ T3892] eql: remember to turn off Van-Jacobson compression on your slave devices [ 15.368195][ T156] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 15.371115][ T3352] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.119' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 39.560336][ T4217] ------------[ cut here ]------------ [ 39.561496][ T4217] Too BIG xdp->frame_sz = 16384 [ 39.563047][ T4217] WARNING: CPU: 1 PID: 4217 at net/core/filter.c:4069 bpf_xdp_adjust_tail+0x228/0x230 [ 39.564962][ T4217] Modules linked in: [ 39.565799][ T4217] CPU: 1 PID: 4217 Comm: syz-executor585 Not tainted 6.1.34-syzkaller #0 [ 39.567569][ T4217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 39.569649][ T4217] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 39.571315][ T4217] pc : bpf_xdp_adjust_tail+0x228/0x230 [ 39.572478][ T4217] lr : bpf_xdp_adjust_tail+0x224/0x230 [ 39.573600][ T4217] sp : ffff80001db174b0 [ 39.574634][ T4217] x29: ffff80001db174b0 x28: ffff0000d9b2cf81 x27: 1ffff00003b62ee1 [ 39.576315][ T4217] x26: dfff800000000000 x25: ffff80001db17718 x24: 0000000000000000 [ 39.577931][ T4217] x23: 0000000000004000 x22: ffff0000d9b2cf81 x21: ffff80001db17700 [ 39.579630][ T4217] x20: ffff80001db17708 x19: ffff800017ed7000 x18: ffff80001db168a0 [ 39.581261][ T4217] x17: 0000000000000000 x16: ffff8000121062b4 x15: 0000000000000000 [ 39.582996][ T4217] x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001 [ 39.584684][ T4217] x11: ff808000081af018 x10: 0000000000000000 x9 : d6cd707d64754e00 [ 39.586328][ T4217] x8 : d6cd707d64754e00 x7 : 0000000000000001 x6 : 0000000000000001 [ 39.587971][ T4217] x5 : ffff80001db16d98 x4 : ffff8000156a2a40 x3 : ffff8000085879f4 [ 39.589634][ T4217] x2 : 0000000000000001 x1 : 0000000100000200 x0 : ffffffffffffffea [ 39.591382][ T4217] Call trace: [ 39.592056][ T4217] bpf_xdp_adjust_tail+0x228/0x230 [ 39.593109][ T4217] bpf_prog_4add87e5301a4105+0x50/0x80 [ 39.594226][ T4217] bpf_dispatcher_xdp_func+0x30/0x44 [ 39.595359][ T4217] bpf_prog_run_generic_xdp+0x428/0xf44 [ 39.596443][ T4217] do_xdp_generic+0x348/0x634 [ 39.597466][ T4217] tun_get_user+0x1e40/0x386c [ 39.598416][ T4217] tun_chr_write_iter+0xfc/0x204 [ 39.599527][ T4217] vfs_write+0x610/0x914 [ 39.600485][ T4217] ksys_write+0x15c/0x26c [ 39.601376][ T4217] __arm64_sys_write+0x7c/0x90 [ 39.602361][ T4217] invoke_syscall+0x98/0x2c0 [ 39.603358][ T4217] el0_svc_common+0x138/0x258 [ 39.604333][ T4217] do_el0_svc+0x64/0x218 [ 39.605170][ T4217] el0_svc+0x58/0x168 [ 39.606012][ T4217] el0t_64_sync_handler+0x84/0xf0 [ 39.607168][ T4217] el0t_64_sync+0x18c/0x190 [ 39.608089][ T4217] irq event stamp: 15129 [ 39.608924][ T4217] hardirqs last enabled at (15128): [] __up_console_sem+0xb4/0x100 [ 39.610970][ T4217] hardirqs last disabled at (15129): [] el1_dbg+0x24/0x80 [ 39.612952][ T4217] softirqs last enabled at (15066): [] bpf_link_settle+0x80/0x148 [ 39.614886][ T4217] softirqs last disabled at (15094): [] local_bh_disable+0x10/0x34 [ 39.616810][ T4217] ---[ end trace 0000000000000000 ]--- [ 39.618298][ T4217] Illegal XDP return value 4294967274 on prog (id 1) dev syz_tun, expect packet loss!