executing program
executing program
BUG: memory leak
unreferenced object 0xffff88811bd72400 (size 224):
  comm "syz-executor721", pid 6487, jiffies 4294943493 (age 12.630s)
  hex dump (first 32 bytes):
    a0 c4 ef 2a 81 88 ff ff a0 c4 ef 2a 81 88 ff ff  ...*.......*....
    00 40 60 1a 81 88 ff ff 00 00 00 00 00 00 00 00  .@`.............
  backtrace:
    [<00000000d6c25eb7>] __build_skb+0x1f/0x100 net/core/skbuff.c:311
    [<0000000043d67111>] __napi_alloc_skb+0xe5/0x140 net/core/skbuff.c:523
    [<00000000b2622b88>] napi_alloc_skb include/linux/skbuff.h:2865 [inline]
    [<00000000b2622b88>] napi_get_frags net/core/dev.c:6053 [inline]
    [<00000000b2622b88>] napi_get_frags+0x3a/0x70 net/core/dev.c:6048
    [<0000000000c0411d>] tun_napi_alloc_frags drivers/net/tun.c:1425 [inline]
    [<0000000000c0411d>] tun_get_user+0xa43/0x1660 drivers/net/tun.c:1789
    [<000000006dbd9b36>] tun_chr_write_iter+0x66/0xa0 drivers/net/tun.c:1986
    [<00000000d12306c9>] call_write_iter include/linux/fs.h:1882 [inline]
    [<00000000d12306c9>] do_iter_readv_writev+0x207/0x2d0 fs/read_write.c:713
    [<0000000022557d6f>] do_iter_write+0xac/0x230 fs/read_write.c:1018
    [<000000008de23adb>] vfs_writev+0xc1/0x120 fs/read_write.c:1091
    [<0000000050ad4278>] do_writev+0x83/0x170 fs/read_write.c:1134
    [<00000000bafa8c00>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<00000000f38c4636>] entry_SYSCALL_64_after_hwframe+0x44/0xa9