Warning: Permanently added '10.128.0.236' (ECDSA) to the list of known hosts. executing program [ 37.494580][ T4307] ------------[ cut here ]------------ [ 37.496035][ T4307] Too BIG xdp->frame_sz = 131072 [ 37.497668][ T4307] WARNING: CPU: 1 PID: 4307 at net/core/filter.c:4069 bpf_xdp_adjust_tail+0x228/0x230 [ 37.500010][ T4307] Modules linked in: [ 37.501040][ T4307] CPU: 1 PID: 4307 Comm: syz-executor391 Not tainted 6.1.15-syzkaller #0 [ 37.503125][ T4307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 37.505691][ T4307] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 37.507620][ T4307] pc : bpf_xdp_adjust_tail+0x228/0x230 [ 37.508990][ T4307] lr : bpf_xdp_adjust_tail+0x224/0x230 [ 37.510334][ T4307] sp : ffff80001dd874b0 [ 37.511501][ T4307] x29: ffff80001dd874b0 x28: ffff0000dbe0feef x27: 1ffff00003bb0ee1 [ 37.513543][ T4307] x26: dfff800000000000 x25: ffff80001dd87718 x24: 0000000000000000 [ 37.515500][ T4307] x23: 0000000000020000 x22: ffff0000dbe0feef x21: ffff80001dd87700 [ 37.517499][ T4307] x20: ffff80001dd87708 x19: ffff800018061000 x18: ffff80001dd868c0 [ 37.519499][ T4307] x17: 0000000000000000 x16: ffff8000122508ac x15: 0000000000000000 [ 37.521478][ T4307] x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001 [ 37.523567][ T4307] x11: ff80800008349608 x10: 0000000000000000 x9 : 4ae44a2cdf4df700 [ 37.525536][ T4307] x8 : 4ae44a2cdf4df700 x7 : 0000000000000001 x6 : 0000000000000001 [ 37.527492][ T4307] x5 : ffff80001dd86db8 x4 : ffff800015823840 x3 : ffff8000085890fc [ 37.529449][ T4307] x2 : 0000000000000001 x1 : 0000000100000200 x0 : ffffffffffffffea [ 37.531451][ T4307] Call trace: [ 37.532325][ T4307] bpf_xdp_adjust_tail+0x228/0x230 [ 37.533644][ T4307] bpf_prog_4add87e5301a4105+0x50/0x80 [ 37.534998][ T4307] bpf_dispatcher_xdp_func+0x30/0x44 [ 37.536274][ T4307] bpf_prog_run_generic_xdp+0x428/0xf44 [ 37.537639][ T4307] do_xdp_generic+0x348/0x634 [ 37.538823][ T4307] tun_get_user+0x2070/0x3ac8 [ 37.539950][ T4307] tun_chr_write_iter+0xfc/0x204 [ 37.541109][ T4307] vfs_write+0x610/0x914 [ 37.542155][ T4307] ksys_write+0x15c/0x26c [ 37.543244][ T4307] __arm64_sys_write+0x7c/0x90 [ 37.544455][ T4307] invoke_syscall+0x98/0x2c0 [ 37.545666][ T4307] el0_svc_common+0x138/0x258 [ 37.546852][ T4307] do_el0_svc+0x64/0x218 [ 37.547911][ T4307] el0_svc+0x58/0x168 [ 37.548902][ T4307] el0t_64_sync_handler+0x84/0xf0 [ 37.550147][ T4307] el0t_64_sync+0x18c/0x190 [ 37.551303][ T4307] irq event stamp: 15685 [ 37.552334][ T4307] hardirqs last enabled at (15684): [] __up_console_sem+0xb4/0x100 [ 37.554729][ T4307] hardirqs last disabled at (15685): [] el1_dbg+0x24/0x80 [ 37.556856][ T4307] softirqs last enabled at (15512): [] bpf_link_settle+0x80/0x148 [ 37.559120][ T4307] softirqs last disabled at (15622): [] local_bh_disable+0x10/0x34 [ 37.561430][ T4307] ---[ end trace 0000000000000000 ]--- [ 37.562823][ T4307] Illegal XDP return value 4294967274 on prog (id 1) dev syz_tun, expect packet loss!