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mtdparts: Fix final outstanding issue reported by Coverity

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As part of fixing the previously reported issues, it was missed that in
the case of mtdparts_init() we need to make sure that tmp_ep is long
enough to contain PARTITION_MAXLEN and a NULL termination.  Then, to be
sure the buffer is NULL terminated, zero the entire buffer rather than
just ensuring the first character is NULL.

Cc: Lothar Waßmann <LW@KARO-electronics.de>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Reported-by: Coverity (CID: 166329)
Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Tom Rini 2017-08-20 20:05:40 -04:00
parent 1e87f9ced4
commit bc028345ac
1 changed files with 2 additions and 2 deletions
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4
cmd/mtdparts.c
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@ -1726,7 +1726,7 @@ int mtdparts_init(void)
const char *ids, *parts;
const char *current_partition;
int ids_changed;
char tmp_ep[PARTITION_MAXLEN];
char tmp_ep[PARTITION_MAXLEN + 1];
char tmp_parts[MTDPARTS_MAXLEN];
debug("\n---mtdparts_init---\n");
@ -1750,7 +1750,7 @@ int mtdparts_init(void)
/* save it for later parsing, cannot rely on current partition pointer
* as 'partition' variable may be updated during init */
tmp_ep[0] = '\0';
memset(tmp_parts, 0, sizeof(tmp_parts));
if (current_partition)
strncpy(tmp_ep, current_partition, PARTITION_MAXLEN);