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| author | Jason Liu <jason.hui@linaro.org> | 2011-08-24 19:26:28 +0800 |
|---|---|---|
| committer | Artem Bityutskiy <artem.bityutskiy@intel.com> | 2011-09-11 15:02:18 +0300 |
| commit | 4d523b60ef9d1953d9e12745ca0ed3e2dc98c189 (patch) | |
| tree | 9fb26d87e6658d03861de2134edea5b2dbb9ecdc | |
| parent | e2e24e8ebf0e96571fbbac95c215df6a2cebbc5b (diff) | |
| download | op-kernel-dev-4d523b60ef9d1953d9e12745ca0ed3e2dc98c189.zip op-kernel-dev-4d523b60ef9d1953d9e12745ca0ed3e2dc98c189.tar.gz | |
mtd: check parts pointer before using it
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>
| -rw-r--r-- | drivers/mtd/mtdcore.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 09bdbac..b01993e 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -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) { |
