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Subject[PATCH] md/dm-stats: Use kmalloc_array() in parse_histogram()
Date
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 1 Oct 2016 05:55:05 +0200

* A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "kmalloc_array".

This issue was detected by using the Coccinelle software.

* Replace the specification of a data type by a pointer dereference
to make the corresponding size determination a bit safer according to
the Linux coding style convention.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
drivers/md/dm-stats.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/md/dm-stats.c b/drivers/md/dm-stats.c
index 38b05f2..7b79425 100644
--- a/drivers/md/dm-stats.c
+++ b/drivers/md/dm-stats.c
@@ -917,7 +917,9 @@ static int parse_histogram(const char *h, unsigned *n_histogram_entries,
if (*q == ',')
(*n_histogram_entries)++;

- *histogram_boundaries = kmalloc(*n_histogram_entries * sizeof(unsigned long long), GFP_KERNEL);
+ *histogram_boundaries = kmalloc_array(*n_histogram_entries,
+ sizeof(**histogram_boundaries),
+ GFP_KERNEL);
if (!*histogram_boundaries)
return -ENOMEM;

--
2.10.0
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