------------[ cut here ]------------ Too BIG xdp->frame_sz = 16384 WARNING: CPU: 1 PID: 7186 at net/core/filter.c:4069 ____bpf_xdp_adjust_tail net/core/filter.c:4069 [inline] WARNING: CPU: 1 PID: 7186 at net/core/filter.c:4069 bpf_xdp_adjust_tail+0x235/0x250 net/core/filter.c:4051 Modules linked in: CPU: 1 PID: 7186 Comm: syz-executor.0 Not tainted 6.1.38-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023 RIP: 0010:____bpf_xdp_adjust_tail net/core/filter.c:4069 [inline] RIP: 0010:bpf_xdp_adjust_tail+0x235/0x250 net/core/filter.c:4051 Code: ff ff 48 89 ef e8 eb 1d 5b f9 e9 64 fe ff ff e8 31 b8 04 f9 c6 05 9a 3c ba 05 01 48 c7 c7 80 92 e1 8b 44 89 ee e8 fb 26 cd f8 <0f> 0b 48 c7 c0 ea ff ff ff e9 24 ff ff ff 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc90014e9f778 EFLAGS: 00010246 RAX: 50b656bcd4c4aa00 RBX: ffffc90014e9f940 RCX: 0000000000040000 RDX: ffffc900048f1000 RSI: 000000000000287e RDI: 000000000000287f RBP: 0000000000000000 R08: ffffffff81524cae R09: fffff520029d3e69 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90014e9f958 R13: 0000000000004000 R14: ffff88807b4e0f81 R15: 1ffff920029d3f29 FS: 00007f2fb59c46c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001001 CR3: 00000000213cb000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bpf_prog_4add87e5301a4105+0x12/0x14 __bpf_prog_run include/linux/filter.h:600 [inline] bpf_prog_run_xdp include/linux/filter.h:775 [inline] bpf_prog_run_generic_xdp+0x572/0x11c0 net/core/dev.c:4766 netif_receive_generic_xdp net/core/dev.c:4852 [inline] do_xdp_generic+0x406/0x6d0 net/core/dev.c:4911 tun_get_user+0x256a/0x4180 drivers/net/tun.c:1913 tun_chr_write_iter+0x10c/0x1f0 drivers/net/tun.c:2037 call_write_iter include/linux/fs.h:2205 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7ae/0xba0 fs/read_write.c:584 ksys_write+0x19c/0x2c0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f2fb4c7b86f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48 RSP: 002b:00007f2fb59c4090 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f2fb4d9bf80 RCX: 00007f2fb4c7b86f RDX: 0000000000000e81 RSI: 0000000020001000 RDI: 00000000000000c8 RBP: 00007f2fb4cc847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000e81 R11: 0000000000000293 R12: 0000000000000000 R13: 000000000000000b R14: 00007f2fb4d9bf80 R15: 00007ffeecbf7458