linux-kernel - [PATCH 4.14 052/101] staging: wilc1000: fix missing read

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Date:   Mon,  7 Jan 2019 13:32:40 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Colin Ian King <colin.king@...onical.com>,
        Ajay Singh <ajay.kathat@...rochip.com>
Subject: [PATCH 4.14 052/101] staging: wilc1000: fix missing read_write setting when reading data

4.14-stable review patch.  If anyone has any objections, please let me know.

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

From: Colin Ian King <colin.king@...onical.com>

commit c58eef061dda7d843dcc0ad6fea7e597d4c377c0 upstream.

Currently the cmd.read_write setting is not initialized so it contains
garbage from the stack.  Fix this by setting it to 0 to indicate a
read is required.

Detected by CoverityScan, CID#1357925 ("Uninitialized scalar variable")

Fixes: c5c77ba18ea6 ("staging: wilc1000: Add SDIO/SPI 802.11 driver")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
Cc: stable <stable@...r.kernel.org>
Acked-by: Ajay Singh <ajay.kathat@...rochip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/staging/wilc1000/wilc_sdio.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/staging/wilc1000/wilc_sdio.c
+++ b/drivers/staging/wilc1000/wilc_sdio.c
@@ -823,6 +823,7 @@ static int sdio_read_int(struct wilc *wi
 	if (!g_sdio.irq_gpio) {
 		int i;
 
+		cmd.read_write = 0;
 		cmd.function = 1;
 		cmd.address = 0x04;
 		cmd.data = 0;