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mtd: check parts pointer before using it

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The code has the check for parts but it called after kmemdup,
kmemdup(parts, sizeof(*parts) * nr_parts,...)
if (!parts)
	return -ENOMEM

In fact, we need check parts before safely using it.
and we also need check the real_parts to make sure kmemdup
allocation sucessfully.

Signed-off-by: Jason Liu <jason.hui@linaro.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@intel.com>
This commit is contained in:
Jason Liu 2011-08-24 19:26:28 +08:00 committed by Artem Bityutskiy
parent e2e24e8ebf
commit 4d523b60ef
1 changed files with 4 additions and 3 deletions
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7
drivers/mtd/mtdcore.c
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@ -465,12 +465,13 @@ int mtd_device_parse_register(struct mtd_info *mtd, const char **types,
struct mtd_partition *real_parts;
err = parse_mtd_partitions(mtd, types, &real_parts, parser_data);
if (err <= 0 && nr_parts) {
if (err <= 0 && nr_parts && parts) {
real_parts = kmemdup(parts, sizeof(*parts) * nr_parts,
GFP_KERNEL);
err = nr_parts;
if (!parts)
if (!real_parts)
err = -ENOMEM;
else
err = nr_parts;
}
if (err > 0) {