[PATCH] fuse: Use kmalloc_array() in three functions

[SF Markus Elfring]

From: Markus Elfring <elfr...@users.sourceforge.net>
Date: Sun, 30 Apr 2017 17:45:19 +0200

* Multiplications for the size determination of memory allocations
  indicated that array data structures should be processed.
  Thus use the corresponding function "kmalloc_array".

  This issue was detected by using the Coccinelle software.

* Replace the specification of data types by pointer dereferences
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfr...@users.sourceforge.net>
---
 fs/fuse/dev.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index c16d00e53264..685dd467c5f7 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -64,9 +64,9 @@ static struct fuse_req *__fuse_request_alloc(unsigned npages, 
gfp_t flags)
                        pages = req->inline_pages;
                        page_descs = req->inline_page_descs;
                } else {
-                       pages = kmalloc(sizeof(struct page *) * npages, flags);
-                       page_descs = kmalloc(sizeof(struct fuse_page_desc) *
-                                            npages, flags);
+                       pages = kmalloc_array(npages, sizeof(*pages), flags);
+                       page_descs = kmalloc_array(npages, sizeof(*page_descs),
+                                                  flags);
                }
 
                if (!pages || !page_descs) {
@@ -1357,7 +1357,7 @@ static ssize_t fuse_dev_splice_read(struct file *in, 
loff_t *ppos,
        if (!fud)
                return -EPERM;
 
-       bufs = kmalloc(pipe->buffers * sizeof(struct pipe_buffer), GFP_KERNEL);
+       bufs = kmalloc_array(pipe->buffers, sizeof(*bufs), GFP_KERNEL);
        if (!bufs)
                return -ENOMEM;
 
@@ -1941,7 +1941,7 @@ static ssize_t fuse_dev_splice_write(struct 
pipe_inode_info *pipe,
        if (!fud)
                return -EPERM;
 
-       bufs = kmalloc(pipe->buffers * sizeof(struct pipe_buffer), GFP_KERNEL);
+       bufs = kmalloc_array(pipe->buffers, sizeof(*bufs), GFP_KERNEL);
        if (!bufs)
                return -ENOMEM;
 
-- 
2.12.2