From: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
[ Upstream commit 2e531bc3e0d86362fcd8a577b3278d9ef3cc2ba0 ]
Some functions of the bitmap API take advantage of the fact that a bitmap
is an array of long.
So, to make sure this assertion is correct, allocate bitmaps with
bitmap_zalloc() instead of kzalloc()+hand-computed number of bytes.
While at it, also use bitmap_free() instead of kfree() to keep the
semantic.
Fixes: 0ab30494bc4f ("memstick: add support for legacy memorysticks")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
Link: https://lore.kernel.org/r/dbf633c48c24ae6d95f852557e8d8b3bbdef65fe.1656155715.git.christophe.jaillet@xxxxxxxxxx
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/memstick/core/ms_block.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/memstick/core/ms_block.c b/drivers/memstick/core/ms_block.c
index 7aab26128f6d..0874fa882649 100644
--- a/drivers/memstick/core/ms_block.c
+++ b/drivers/memstick/core/ms_block.c
@@ -1339,17 +1339,17 @@ static int msb_ftl_initialize(struct msb_data *msb)
msb->zone_count = msb->block_count / MS_BLOCKS_IN_ZONE;
msb->logical_block_count = msb->zone_count * 496 - 2;
- msb->used_blocks_bitmap = kzalloc(msb->block_count / 8, GFP_KERNEL);
- msb->erased_blocks_bitmap = kzalloc(msb->block_count / 8, GFP_KERNEL);
+ msb->used_blocks_bitmap = bitmap_zalloc(msb->block_count, GFP_KERNEL);
+ msb->erased_blocks_bitmap = bitmap_zalloc(msb->block_count, GFP_KERNEL);
msb->lba_to_pba_table =
kmalloc_array(msb->logical_block_count, sizeof(u16),
GFP_KERNEL);
if (!msb->used_blocks_bitmap || !msb->lba_to_pba_table ||
!msb->erased_blocks_bitmap) {
- kfree(msb->used_blocks_bitmap);
+ bitmap_free(msb->used_blocks_bitmap);
+ bitmap_free(msb->erased_blocks_bitmap);
kfree(msb->lba_to_pba_table);
- kfree(msb->erased_blocks_bitmap);
return -ENOMEM;
}
@@ -1961,7 +1961,7 @@ static int msb_bd_open(struct block_device *bdev, fmode_t mode)
static void msb_data_clear(struct msb_data *msb)
{
kfree(msb->boot_page);
- kfree(msb->used_blocks_bitmap);
+ bitmap_free(msb->used_blocks_bitmap);
kfree(msb->lba_to_pba_table);
kfree(msb->cache);
msb->card = NULL;
--
2.35.1
