netdev - [PATCH] net: usb: pegasus: fix improper read if get

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Message-Id: <20190730131357.30697-1-dkirjanov@suse.com>
Date:   Tue, 30 Jul 2019 15:13:57 +0200
From:   Denis Kirjanov <kda@...ux-powerpc.org>
To:     petkan@...leusys.com, davem@...emloft.net
Cc:     netdev@...r.kernel.org, Denis Kirjanov <kda@...ux-powerpc.org>
Subject: [PATCH] net: usb: pegasus: fix improper read if get_registers() fail

get_registers() may fail with -ENOMEM and in this
case we can read a garbage from the status variable tmp.

Reported-by: syzbot+3499a83b2d062ae409d4@...kaller.appspotmail.com
Signed-off-by: Denis Kirjanov <kda@...ux-powerpc.org>
---
 drivers/net/usb/pegasus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c
index 6d25dea5ad4b..f7d117d80cfb 100644
--- a/drivers/net/usb/pegasus.c
+++ b/drivers/net/usb/pegasus.c
@@ -282,7 +282,7 @@ static void mdio_write(struct net_device *dev, int phy_id, int loc, int val)
 static int read_eprom_word(pegasus_t *pegasus, __u8 index, __u16 *retdata)
 {
 	int i;
-	__u8 tmp;
+	__u8 tmp = 0;
 	__le16 retdatai;
 	int ret;
 
-- 
2.12.3