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regmap: maple: Switch to use kmemdup_array()

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Let the kememdup_array() take care about multiplication and possible
overflows.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240606164717.3031107-5-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andy Shevchenko
2024-06-06 19:46:25 +03:00
committed by Mark Brown
parent f755d69553
commit bce8430658
1 changed files with 6 additions and 7 deletions
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13
drivers/base/regmap/regcache-maple.c
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@@ -132,9 +132,9 @@ static int regcache_maple_drop(struct regmap *map, unsigned int min,
lower_index = mas.index;
lower_last = min -1;
lower = kmemdup(entry, ((min - mas.index) *
sizeof(unsigned long)),
map->alloc_flags);
lower = kmemdup_array(entry,
min - mas.index, sizeof(*lower),
map->alloc_flags);
if (!lower) {
ret = -ENOMEM;
goto out_unlocked;
@@ -145,10 +145,9 @@ static int regcache_maple_drop(struct regmap *map, unsigned int min,
upper_index = max + 1;
upper_last = mas.last;
upper = kmemdup(&entry[max - mas.index + 1],
((mas.last - max) *
sizeof(unsigned long)),
map->alloc_flags);
upper = kmemdup_array(&entry[max - mas.index + 1],
mas.last - max, sizeof(*upper),
map->alloc_flags);
if (!upper) {
ret = -ENOMEM;
goto out_unlocked;