Commit bf1028a4 authored by Gustavo A. R. Silva's avatar Gustavo A. R. Silva Committed by Steve French

cifs: misc: Use array_size() in if-statement controlling expression

Use array_size() instead of the open-coded version in the controlling
expression of the if statement.

Also, while there, use the preferred form for passing a size of a struct.
The alternative form where struct name is spelled out hurts readability
and introduces an opportunity for a bug when the pointer variable type is
changed but the corresponding sizeof that is passed as argument is not.

This issue was found with the help of Coccinelle and, audited and fixed
manually.

Addresses-KSPP-ID: https://github.com/KSPP/linux/issues/83Signed-off-by: default avatarGustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
Reviewed-by: default avatarAurelien Aptel <aaptel@suse.com>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarSteve French <stfrench@microsoft.com>
parent 5618303d
......@@ -844,28 +844,26 @@ setup_aio_ctx_iter(struct cifs_aio_ctx *ctx, struct iov_iter *iter, int rw)
struct bio_vec *bv = NULL;
if (iov_iter_is_kvec(iter)) {
memcpy(&ctx->iter, iter, sizeof(struct iov_iter));
memcpy(&ctx->iter, iter, sizeof(*iter));
ctx->len = count;
iov_iter_advance(iter, count);
return 0;
}
if (max_pages * sizeof(struct bio_vec) <= CIFS_AIO_KMALLOC_LIMIT)
bv = kmalloc_array(max_pages, sizeof(struct bio_vec),
GFP_KERNEL);
if (array_size(max_pages, sizeof(*bv)) <= CIFS_AIO_KMALLOC_LIMIT)
bv = kmalloc_array(max_pages, sizeof(*bv), GFP_KERNEL);
if (!bv) {
bv = vmalloc(array_size(max_pages, sizeof(struct bio_vec)));
bv = vmalloc(array_size(max_pages, sizeof(*bv)));
if (!bv)
return -ENOMEM;
}
if (max_pages * sizeof(struct page *) <= CIFS_AIO_KMALLOC_LIMIT)
pages = kmalloc_array(max_pages, sizeof(struct page *),
GFP_KERNEL);
if (array_size(max_pages, sizeof(*pages)) <= CIFS_AIO_KMALLOC_LIMIT)
pages = kmalloc_array(max_pages, sizeof(*pages), GFP_KERNEL);
if (!pages) {
pages = vmalloc(array_size(max_pages, sizeof(struct page *)));
pages = vmalloc(array_size(max_pages, sizeof(*pages)));
if (!pages) {
kvfree(bv);
return -ENOMEM;
......
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