executing program
executing program
BUG: memory leak
unreferenced object 0xffff88812a99da00 (size 224):
  comm "syz-executor509", pid 6441, jiffies 4294949761 (age 13.510s)
  hex dump (first 32 bytes):
    a0 8c d6 1d 81 88 ff ff a0 8c d6 1d 81 88 ff ff  ................
    00 00 16 18 81 88 ff ff 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<000000005eeeeada>] __build_skb+0x1f/0x100 net/core/skbuff.c:311
    [<0000000033faa842>] __napi_alloc_skb+0xe5/0x140 net/core/skbuff.c:523
    [<00000000eec08e2f>] napi_alloc_skb include/linux/skbuff.h:2856 [inline]
    [<00000000eec08e2f>] napi_get_frags net/core/dev.c:6053 [inline]
    [<00000000eec08e2f>] napi_get_frags+0x3a/0x70 net/core/dev.c:6048
    [<00000000e8128a83>] tun_napi_alloc_frags drivers/net/tun.c:1425 [inline]
    [<00000000e8128a83>] tun_get_user+0xa43/0x1660 drivers/net/tun.c:1789
    [<00000000d2a43f1a>] tun_chr_write_iter+0x66/0xa0 drivers/net/tun.c:1986
    [<0000000080294308>] call_write_iter include/linux/fs.h:1882 [inline]
    [<0000000080294308>] do_iter_readv_writev+0x207/0x2d0 fs/read_write.c:713
    [<00000000836562d3>] do_iter_write+0xac/0x230 fs/read_write.c:1018
    [<000000003c276528>] vfs_writev+0xc1/0x120 fs/read_write.c:1091
    [<00000000a1306b29>] do_writev+0x83/0x170 fs/read_write.c:1134
    [<000000007497a897>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<00000000da9ee6e6>] entry_SYSCALL_64_after_hwframe+0x44/0xa9