提交 8be4a30e 编写于 作者: C Christoph Hellwig 提交者: Greg Kroah-Hartman

9p: pass the correct prototype to read_cache_page

[ Upstream commit f053cbd4366051d7eb6ba1b8d529d20f719c2963 ]

Fix the callback 9p passes to read_cache_page to actually have the
proper type expected.  Casting around function pointers can easily
hide typing bugs, and defeats control flow protection.

Link: http://lkml.kernel.org/r/20190520055731.24538-5-hch@lst.deSigned-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NKees Cook <keescook@chromium.org>
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
上级 071f2135
......@@ -50,8 +50,9 @@
* @page: structure to page
*
*/
static int v9fs_fid_readpage(struct p9_fid *fid, struct page *page)
static int v9fs_fid_readpage(void *data, struct page *page)
{
struct p9_fid *fid = data;
struct inode *inode = page->mapping->host;
struct bio_vec bvec = {.bv_page = page, .bv_len = PAGE_SIZE};
struct iov_iter to;
......@@ -122,7 +123,8 @@ static int v9fs_vfs_readpages(struct file *filp, struct address_space *mapping,
if (ret == 0)
return ret;
ret = read_cache_pages(mapping, pages, (void *)v9fs_vfs_readpage, filp);
ret = read_cache_pages(mapping, pages, v9fs_fid_readpage,
filp->private_data);
p9_debug(P9_DEBUG_VFS, " = %d\n", ret);
return ret;
}
......
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