Warning: Permanently added '10.128.10.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.063094][ T3968] ------------[ cut here ]------------ [ 43.064330][ T3968] Too BIG xdp->frame_sz = 16384 [ 43.065792][ T3968] WARNING: CPU: 1 PID: 3968 at net/core/filter.c:3848 bpf_xdp_adjust_tail+0x1a8/0x1b0 [ 43.067699][ T3968] Modules linked in: [ 43.068562][ T3968] CPU: 1 PID: 3968 Comm: syz-executor369 Not tainted 5.15.117-syzkaller #0 [ 43.070406][ T3968] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 43.072553][ T3968] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 43.074156][ T3968] pc : bpf_xdp_adjust_tail+0x1a8/0x1b0 [ 43.075274][ T3968] lr : bpf_xdp_adjust_tail+0x1a4/0x1b0 [ 43.076399][ T3968] sp : ffff80001cdf7470 [ 43.077262][ T3968] x29: ffff80001cdf7470 x28: ffff0000da6ebec0 x27: 1ffff000039beed9 [ 43.078992][ T3968] x26: ffff0000da6e8f81 x25: dfff800000000000 x24: 0000000000004000 [ 43.080746][ T3968] x23: ffff0000da6e8f81 x22: 0000000000000000 x21: ffff80001cdf76c0 [ 43.082405][ T3968] x20: ffff80001cdf76c8 x19: ffff800016cf0000 x18: 0000000000000201 [ 43.084079][ T3968] x17: ff80800008335ea8 x16: 0000000000000000 x15: ffff800008335ea8 [ 43.085709][ T3968] x14: 00000000ffffffff x13: ffffffffffffffff x12: 0000000000000000 [ 43.087382][ T3968] x11: ff8080000832d950 x10: 0000000000000000 x9 : afcf65cdf233ad00 [ 43.089053][ T3968] x8 : afcf65cdf233ad00 x7 : 0000000000000001 x6 : 0000000000000001 [ 43.090726][ T3968] x5 : ffff80001cdf6bd8 x4 : ffff8000149cfca0 x3 : ffff800008335ff4 [ 43.092419][ T3968] x2 : 0000000000000001 x1 : 0000000100000200 x0 : ffffffffffffffea [ 43.094033][ T3968] Call trace: [ 43.094711][ T3968] bpf_xdp_adjust_tail+0x1a8/0x1b0 [ 43.095780][ T3968] bpf_prog_4add87e5301a4105+0x3c/0x738 [ 43.096920][ T3968] bpf_dispatcher_xdp_func+0x30/0x44 [ 43.097974][ T3968] bpf_prog_run_generic_xdp+0x3e0/0xea8 [ 43.099089][ T3968] do_xdp_generic+0x400/0x8a8 [ 43.100034][ T3968] tun_get_user+0x1da4/0x3774 [ 43.100989][ T3968] tun_chr_write_iter+0xfc/0x20c [ 43.102010][ T3968] vfs_write+0x87c/0xb3c [ 43.102885][ T3968] ksys_write+0x15c/0x26c [ 43.103787][ T3968] __arm64_sys_write+0x7c/0x90 [ 43.104752][ T3968] invoke_syscall+0x98/0x2b8 [ 43.105711][ T3968] el0_svc_common+0x138/0x258 [ 43.106664][ T3968] do_el0_svc+0x58/0x14c [ 43.107539][ T3968] el0_svc+0x7c/0x1f0 [ 43.108327][ T3968] el0t_64_sync_handler+0x84/0xe4 [ 43.109433][ T3968] el0t_64_sync+0x1a0/0x1a4 [ 43.110357][ T3968] irq event stamp: 14167 [ 43.111273][ T3968] hardirqs last enabled at (14166): [] __up_console_sem+0xb4/0x100 [ 43.113277][ T3968] hardirqs last disabled at (14167): [] el1_dbg+0x24/0x80 [ 43.115174][ T3968] softirqs last enabled at (14104): [] bpf_link_settle+0x80/0x148 [ 43.117165][ T3968] softirqs last disabled at (14134): [] local_bh_disable+0x10/0x34 [ 43.119119][ T3968] ---[ end trace 18bc41a2f3184fc5 ]--- [ 43.120301][ T3968] Illegal XDP return value 4294967274, expect packet loss!