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Subject[PATCH 4.7 049/143] USB: serial: fix memleak in driver-registration error path
Date
4.7-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alexey Klimov <klimov.linux@gmail.com>

commit 647024a7df36014bbc4479d92d88e6b77c0afcf6 upstream.

udriver struct allocated by kzalloc() will not be freed
if usb_register() and next calls fail. This patch fixes this
by adding one more step with kfree(udriver) in error path.

Signed-off-by: Alexey Klimov <klimov.linux@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/usb/serial/usb-serial.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1433,7 +1433,7 @@ int usb_serial_register_drivers(struct u

rc = usb_register(udriver);
if (rc)
- return rc;
+ goto failed_usb_register;

for (sd = serial_drivers; *sd; ++sd) {
(*sd)->usb_driver = udriver;
@@ -1451,6 +1451,8 @@ int usb_serial_register_drivers(struct u
while (sd-- > serial_drivers)
usb_serial_deregister(*sd);
usb_deregister(udriver);
+failed_usb_register:
+ kfree(udriver);
return rc;
}
EXPORT_SYMBOL_GPL(usb_serial_register_drivers);

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