linux-kernel - [PATCH] mtd: ubi: wl: Fix uninitialized variable

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Message-ID: <20190302195907.GA16022@embeddedor.com>
Date:   Sat, 2 Mar 2019 13:59:07 -0600
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Artem Bityutskiy <dedekind1@...il.com>,
        Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <bbrezillon@...nel.org>,
        Marek Vasut <marek.vasut@...il.com>
Cc:     linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: [PATCH] mtd: ubi: wl: Fix uninitialized variable

There is a potential execution path in which variable *err*
is compared against UBI_IO_BITFLIPS without being properly
initialized previously.

Fix this by initializing variable *err* to 0.

Addresses-Coverity-ID: 1477298 "(Uninitialized scalar variable")
Fixes: 663586c0a892 ("ubi: Expose the bitrot interface")
Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/mtd/ubi/wl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index 40f838d54b0f..cf07d869724f 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -1475,7 +1475,7 @@ static bool scrub_possible(struct ubi_device *ubi, struct ubi_wl_entry *e)
  */
 int ubi_bitflip_check(struct ubi_device *ubi, int pnum, int force)
 {
-	int err;
+	int err = 0;
 	struct ubi_wl_entry *e;
 
 	if (pnum < 0 || pnum >= ubi->peb_count) {
-- 
2.21.0