[patch] staging: rts5139: use kzalloc() to close an info leak

[Dan Carpenter]

If we don't fill the whole buffer then there is information leaked to
the user.

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
---
Hopefully this is only reachable by root so it's probably not such a big
deal.

diff --git a/drivers/staging/rts5139/rts51x_fop.c b/drivers/staging/rts5139/rts51x_fop.c
index e1200fe..bf1a9e6 100644
--- a/drivers/staging/rts5139/rts51x_fop.c
+++ b/drivers/staging/rts5139/rts51x_fop.c
@@ -79,7 +79,7 @@ static int rts51x_sd_direct_cmnd(struct rts51x_chip *chip,
 
 	case 1:
 		/* Read from card */
-		buf = kmalloc(cmnd->buf_len, GFP_KERNEL);
+		buf = kzalloc(cmnd->buf_len, GFP_KERNEL);
 		if (!buf)
 			TRACE_RET(chip, STATUS_NOMEM);