From: Christophe JAILLET christophe.jaillet@wanadoo.fr
stable inclusion from stable-v5.10.137 commit ae2369ac42478037f0477938eccde014408cf0c6 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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@wanadoo.fr Link: https://lore.kernel.org/r/dbf633c48c24ae6d95f852557e8d8b3bbdef65fe.165615571... Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Wei Li liwei391@huawei.com --- 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 bc1f484f50f1..6fa3ad3a94a0 100644 --- a/drivers/memstick/core/ms_block.c +++ b/drivers/memstick/core/ms_block.c @@ -1335,17 +1335,17 @@ 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; }
@@ -1953,7 +1953,7 @@ 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;