[PATCH] fastboot: mmc: Fix dest size in strlcat()

[Ariel D'Alessandro]

strlcat() is truncating the destination string to the size of the source
string. Fix size argument in strlcat() to match the size of destination
buffer.

Bug was introduced in the following commit:

commit 69a752983171c2983fc1f29c7cfa1844f41e5d8b
Author: Sean Anderson <seanga2 at gmail.com>

    fastboot: Fix possible buffer overrun

Signed-off-by: Ariel D'Alessandro <ariel.dalessandro at collabora.com>
---
 drivers/fastboot/fb_mmc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/fastboot/fb_mmc.c b/drivers/fastboot/fb_mmc.c
index cbb3f7b1dea..4c54f0c3893 100644
--- a/drivers/fastboot/fb_mmc.c
+++ b/drivers/fastboot/fb_mmc.c
@@ -40,7 +40,7 @@ static int raw_part_get_info_by_name(struct blk_desc *dev_desc,
 
 	/* check for raw partition descriptor */
 	strcpy(env_desc_name, "fastboot_raw_partition_");
-	strlcat(env_desc_name, name, PART_NAME_LEN);
+	strlcat(env_desc_name, name, ARRAY_SIZE(env_desc_name));
 	raw_part_desc = strdup(env_get(env_desc_name));
 	if (raw_part_desc == NULL)
 		return -ENODEV;
@@ -114,7 +114,7 @@ static int part_get_info_by_name_or_alias(struct blk_desc **dev_desc,
 
 		/* check for alias */
 		strcpy(env_alias_name, "fastboot_partition_alias_");
-		strlcat(env_alias_name, name, PART_NAME_LEN);
+		strlcat(env_alias_name, name, ARRAY_SIZE(env_alias_name));
 		aliased_part_name = env_get(env_alias_name);
 		if (aliased_part_name != NULL)
 			ret = do_get_part_info(dev_desc, aliased_part_name,
-- 
2.30.2