From b0795bbf6dc6bd0a7a37d9d1ef4558e9e2b0acd6 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Fri, 13 May 2011 17:30:46 +0200 Subject: [PATCH] drivers/usb/serial/opticon.c: Release resources on kmalloc failure Several resources have been allocated before this kmalloc failure, and thus they should be released in this error handling code, as done in nearby error handling code. The semantic match that finds this problem is: (http://coccinelle.lip6.fr/) // @r exists@ local idexpression urb; statement S; position p1,p2; @@ urb = usb_alloc_urb@p1(...); ... when != urb if (urb == NULL) S ... when != urb ( return <+...urb...+>; | return@p2 ...; ) @script:python@ p1 << r.p1; p2 << r.p2; @@ cocci.print_main("",p1) cocci.print_secs("",p2) // Signed-off-by: Julia Lawall Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/opticon.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c index 1b5633f46984..96423f3c8ef3 100644 --- a/drivers/usb/serial/opticon.c +++ b/drivers/usb/serial/opticon.c @@ -289,8 +289,11 @@ static int opticon_write(struct tty_struct *tty, struct usb_serial_port *port, /* The conncected devices do not have a bulk write endpoint, * to transmit data to de barcode device the control endpoint is used */ dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO); - if (!dr) - return -ENOMEM; + if (!dr) { + dev_err(&port->dev, "out of memory\n"); + count = -ENOMEM; + goto error; + } dr->bRequestType = USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT; dr->bRequest = 0x01; -- 2.30.2