------------[ cut here ]------------
Too BIG xdp->frame_sz = 4160
WARNING: CPU: 0 PID: 7077 at net/core/filter.c:4120 bpf_xdp_adjust_tail+0x228/0x230 net/core/filter.c:4102
Modules linked in:
CPU: 0 PID: 7077 Comm: syz-executor.4 Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : bpf_xdp_adjust_tail+0x228/0x230 net/core/filter.c:4102
lr : ____bpf_xdp_adjust_tail net/core/filter.c:4120 [inline]
lr : bpf_xdp_adjust_tail+0x224/0x230 net/core/filter.c:4102
sp : ffff800097b27700
x29: ffff800097b27700 x28: ffff0000d3f18ec1 x27: 1ffff00012f64f23
x26: dfff800000000000 x25: ffff800097b27928 x24: 0000000000000000
x23: 0000000000001040 x22: ffff0000d3f18ec1 x21: ffff800097b27910
x20: ffff800097b27918 x19: ffff800090b6d000 x18: ffff0001b4230028
x17: 0000000000000000 x16: ffff80008a4483a0 x15: 0000000000000202
x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000040000 x10: 0000000000000fe9 x9 : b09dce7bc8942c00
x8 : b09dce7bc8942c00 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800097b26ff8 x4 : ffff80008dfcee80 x3 : ffff800080597614
x2 : 0000000000000001 x1 : 0000000000000200 x0 : ffffffffffffffea
Call trace:
 bpf_xdp_adjust_tail+0x228/0x230 net/core/filter.c:4102
 bpf_prog_4add87e5301a4105+0x50/0x80
 bpf_dispatcher_xdp_func+0x30/0x44 net/core/filter.c:11432
 __bpf_prog_run include/linux/filter.h:600 [inline]
 bpf_prog_run_xdp include/linux/filter.h:775 [inline]
 tun_build_skb drivers/net/tun.c:1709 [inline]
 tun_get_user+0x24f8/0x35e0 drivers/net/tun.c:1817
 tun_chr_write_iter+0xfc/0x204 drivers/net/tun.c:2043
 call_write_iter include/linux/fs.h:1868 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x618/0x918 fs/read_write.c:584
 ksys_write+0x15c/0x26c fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191
 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
irq event stamp: 1805
hardirqs last  enabled at (1804): [<ffff800080351108>] __up_console_sem+0x60/0xb4 kernel/printk/printk.c:347
hardirqs last disabled at (1805): [<ffff80008a443db4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:407
softirqs last  enabled at (1774): [<ffff800080034380>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (1782): [<ffff800084d0e9f8>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---
Illegal XDP return value 4294967274 on prog  (id 6) dev syz_tun, expect packet loss!