[PATCH] staging/media/as102: Don't call release_firmware() onuninitialized variable

From: Jesper Juhl
Date: Sat Mar 24 2012 - 18:39:58 EST

If, in drivers/staging/media/as102/as102_fw.c::as102_fw_upload(), the call
cmd_buf = kzalloc(MAX_FW_PKT_SIZE, GFP_KERNEL);
should fail and return NULL so that we jump to the 'error:' label,
then we'll end up calling 'release_firmware(firmware);' with
'firmware' still uninitialized - not good.

The easy fix is to just initialize 'firmware' to NULL when we declare
it, since release_firmware() deals gracefully with being passed NULL

Signed-off-by: Jesper Juhl <jj@xxxxxxxxxxxxx>
drivers/staging/media/as102/as102_fw.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

Only compile tested.

diff --git a/drivers/staging/media/as102/as102_fw.c b/drivers/staging/media/as102/as102_fw.c
index 43ebc43..1075fb1 100644
--- a/drivers/staging/media/as102/as102_fw.c
+++ b/drivers/staging/media/as102/as102_fw.c
@@ -165,7 +165,7 @@ error:
int as102_fw_upload(struct as10x_bus_adapter_t *bus_adap)
int errno = -EFAULT;
- const struct firmware *firmware;
+ const struct firmware *firmware = NULL;
unsigned char *cmd_buf = NULL;
char *fw1, *fw2;
struct usb_device *dev = bus_adap->usb_dev;

Jesper Juhl <jj@xxxxxxxxxxxxx> http://www.chaosbits.net/
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