Fix a file descriptor leak in TapInterfaceDesc::interface_mtu.

2017-08-21 05:52:09 +00:00 · 2017-08-21 05:52:09 +00:00 · 15085bd8ba
parent 699f5daa3e
commit 15085bd8ba
1 changed files with 5 additions and 1 deletions
--- a/src/phy/sys/tap_interface.rs
+++ b/src/phy/sys/tap_interface.rs
@ -37,7 +37,11 @@ impl TapInterfaceDesc {
            lower
        };

-        ifreq_ioctl(lower, &mut self.ifreq, imp::SIOCGIFMTU).map(|mtu| mtu as usize)
+        let mtu = ifreq_ioctl(lower, &mut self.ifreq, imp::SIOCGIFMTU).map(|mtu| mtu as usize);
+
+        unsafe { libc::close(lower); }
+
+        mtu
    }

    fn wait(&mut self, ms: u32) -> io::Result<bool> {