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regmap: cache: rbtree: use krealloc_array() to replace krealloc() 

Use krealloc_array() to replace krealloc() with multiplication.
krealloc_array() has multiply overflow check, which will be safer.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://patch.msgid.link/20241121123439.4180167-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andy Shevchenko 2024-11-21 14:34:39 +02:00 committed by Mark Brown
parent 37c95f022a
commit b95cacd8d7
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GPG Key ID: 24D68B725D5487D0
1 changed files with 4 additions and 6 deletions
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10
drivers/base/regmap/regcache-rbtree.c
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@ -275,18 +275,16 @@ static int regcache_rbtree_insert_to_block(struct regmap *map,
pos = (reg - base_reg) / map->reg_stride;
offset = (rbnode->base_reg - base_reg) / map->reg_stride;
blk = krealloc(rbnode->block,
blklen * map->cache_word_size,
map->alloc_flags);
blk = krealloc_array(rbnode->block, blklen, map->cache_word_size, map->alloc_flags);
if (!blk)
return -ENOMEM;
rbnode->block = blk;
if (BITS_TO_LONGS(blklen) > BITS_TO_LONGS(rbnode->blklen)) {
present = krealloc(rbnode->cache_present,
BITS_TO_LONGS(blklen) * sizeof(*present),
map->alloc_flags);
present = krealloc_array(rbnode->cache_present,
BITS_TO_LONGS(blklen), sizeof(*present),
map->alloc_flags);
if (!present)
return -ENOMEM;