mtd: memory corruption in block2mtd.c

The block2mtd driver (drivers/mtd/devices/block2mtd.c) will kfree an on-stack
pointer when handling an invalid argument line (e.g.
block2mtd=/dev/loop0,xxx).

The kfree was added some time ago when "name" was dynamically allocated.

Signed-off-by: Ingo van Lil <[email protected]>
Acked-by: Joern Engel <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: <[email protected]>
Cc: Andrew Morton <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/drivers/mtd/devices/block2mtd.c b/drivers/mtd/devices/block2mtd.c
index eeaaa9dce6ef62607ee510e580d647554bca8611..ad1880c67518eead88feb416b72a598fb86a9ba6 100644 (file)
--- a/drivers/mtd/devices/block2mtd.c
+++ b/drivers/mtd/devices/block2mtd.c
@@ -408,7 +408,6 @@ static int block2mtd_setup2(const char *val)
        if (token[1]) {
                ret = parse_num(&erase_size, token[1]);
                if (ret) {
-                       kfree(name);
                        parse_err("illegal erase size");
                }
        }