Warning: Permanently added '10.128.1.11' (ECDSA) to the list of known hosts. executing program [ 34.635122][ T5983] ------------[ cut here ]------------ [ 34.636424][ T5983] Too BIG xdp->frame_sz = 16384 [ 34.637965][ T5983] WARNING: CPU: 0 PID: 5983 at net/core/filter.c:4120 bpf_xdp_adjust_tail+0x228/0x230 [ 34.640061][ T5983] Modules linked in: [ 34.640883][ T5983] CPU: 0 PID: 5983 Comm: syz-executor246 Not tainted 6.4.0-rc5-syzkaller-g177239177378 #0 [ 34.642960][ T5983] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 34.645143][ T5983] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 34.646819][ T5983] pc : bpf_xdp_adjust_tail+0x228/0x230 [ 34.648004][ T5983] lr : bpf_xdp_adjust_tail+0x224/0x230 [ 34.649129][ T5983] sp : ffff8000966b74b0 [ 34.650039][ T5983] x29: ffff8000966b74b0 x28: ffff0000db608f81 x27: 1ffff00012cd6ee1 [ 34.651739][ T5983] x26: dfff800000000000 x25: ffff8000966b7718 x24: 0000000000000000 [ 34.653408][ T5983] x23: 0000000000004000 x22: ffff0000db608f81 x21: ffff8000966b7700 [ 34.655116][ T5983] x20: ffff8000966b7708 x19: ffff800090b05000 x18: ffff8000966b6980 [ 34.656812][ T5983] x17: 0000000000000000 x16: ffff80008a43bfbc x15: 0000000000000202 [ 34.658572][ T5983] x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001 [ 34.660212][ T5983] x11: 0000000000000200 x10: 0000000000000000 x9 : 43bf00cf83114d00 [ 34.661950][ T5983] x8 : 43bf00cf83114d00 x7 : 0000000000000001 x6 : 0000000000000001 [ 34.663662][ T5983] x5 : ffff8000966b6d98 x4 : ffff80008df9ee80 x3 : ffff8000805974f4 [ 34.665249][ T5983] x2 : 0000000000000001 x1 : 0000000100000200 x0 : ffffffffffffffea [ 34.666956][ T5983] Call trace: [ 34.667645][ T5983] bpf_xdp_adjust_tail+0x228/0x230 [ 34.668655][ T5983] bpf_prog_4add87e5301a4105+0x50/0x80 [ 34.669866][ T5983] bpf_dispatcher_xdp_func+0x30/0x44 [ 34.670974][ T5983] bpf_prog_run_generic_xdp+0x428/0xf40 [ 34.672165][ T5983] do_xdp_generic+0x400/0x8c8 [ 34.673134][ T5983] tun_get_user+0x1d24/0x35e0 [ 34.674169][ T5983] tun_chr_write_iter+0xfc/0x204 [ 34.675236][ T5983] vfs_write+0x618/0x918 [ 34.676167][ T5983] ksys_write+0x15c/0x26c [ 34.677101][ T5983] __arm64_sys_write+0x7c/0x90 [ 34.678086][ T5983] invoke_syscall+0x98/0x2c0 [ 34.679131][ T5983] el0_svc_common+0x138/0x244 [ 34.680144][ T5983] do_el0_svc+0x64/0x198 [ 34.681063][ T5983] el0_svc+0x4c/0x160 [ 34.681856][ T5983] el0t_64_sync_handler+0x84/0xfc [ 34.682938][ T5983] el0t_64_sync+0x190/0x194 [ 34.683894][ T5983] irq event stamp: 15599 [ 34.684807][ T5983] hardirqs last enabled at (15598): [] __up_console_sem+0x60/0xb4 [ 34.686858][ T5983] hardirqs last disabled at (15599): [] el1_dbg+0x24/0x80 [ 34.688680][ T5983] softirqs last enabled at (15544): [] bpf_link_settle+0x80/0x148 [ 34.690635][ T5983] softirqs last disabled at (15566): [] local_bh_disable+0x10/0x34 [ 34.692664][ T5983] ---[ end trace 0000000000000000 ]--- [ 34.693873][ T5983] Illegal XDP return value 4294967274 on prog (id 1) dev syz_tun, expect packet loss!