From: SF Markus Elfring <elfring@users.sourceforge.net> To: linux-fsdevel@vger.kernel.org, Miklos Szeredi <miklos@szeredi.hu> Cc: LKML <linux-kernel@vger.kernel.org>, kernel-janitors@vger.kernel.org Subject: [PATCH] fuse: Use kmalloc_array() in three functions Date: Sun, 30 Apr 2017 17:55:32 +0200 [thread overview] Message-ID: <2e6f0cd2-2a24-2d1e-9301-7e5238372306@users.sourceforge.net> (raw) From: Markus Elfring <elfring@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 <elfring@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
WARNING: multiple messages have this Message-ID (diff)
From: SF Markus Elfring <elfring@users.sourceforge.net> To: linux-fsdevel@vger.kernel.org, Miklos Szeredi <miklos@szeredi.hu> Cc: LKML <linux-kernel@vger.kernel.org>, kernel-janitors@vger.kernel.org Subject: [PATCH] fuse: Use kmalloc_array() in three functions Date: Sun, 30 Apr 2017 15:55:32 +0000 [thread overview] Message-ID: <2e6f0cd2-2a24-2d1e-9301-7e5238372306@users.sourceforge.net> (raw) From: Markus Elfring <elfring@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 <elfring@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
next reply other threads:[~2017-04-30 15:55 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-04-30 15:55 SF Markus Elfring [this message] 2017-04-30 15:55 ` [PATCH] fuse: Use kmalloc_array() in three functions SF Markus Elfring
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