usbserial: Reference leak

A sufficiently-large number of USB serial devices causes a reference leak
when /proc/tty/drivers/usbserial is read.

Signed-Off-By: Matthias Urlichs <smurf@smurf.noris.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 12c1694d322ef3fa55650a0950c97779df1f68d4..e06a41bd0f3ba4b458aaf11470c901965cff7710 100644 (file)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -464,8 +464,10 @@ static int serial_read_proc (char *page, char **start, off_t off, int count, int
                length += sprintf (page+length, " path:%s", tmp);
                        
                length += sprintf (page+length, "\n");
-               if ((length + begin) > (off + count))
+               if ((length + begin) > (off + count)) {
+                       usb_serial_put(serial);
                        goto done;
+               }
                if ((length + begin) < off) {
                        begin += length;
                        length = 0;