From: Andrey Ryabinin <aryabinin@virtuozzo.com>
Date: Tue, 17 Jul 2018 16:00:35 +0000 (+0300)
Subject: fuse: reduce allocation size for splice_write
X-Git-Tag: v4.19-rc1~65^2
X-Git-Url: https://repo.jachan.dev/linux.git/commitdiff_plain/963545357202

fuse: reduce allocation size for splice_write

The 'bufs' array contains 'pipe->buffers' elements, but the
fuse_dev_splice_write() uses only 'pipe->nrbufs' elements.

So reduce the allocation size to 'pipe->nrbufs' elements.

Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 1050c1cc22fe..11ea2c4a38ab 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1957,7 +1957,7 @@ static ssize_t fuse_dev_splice_write(struct pipe_inode_info *pipe,
 
 	pipe_lock(pipe);
 
-	bufs = kvmalloc_array(pipe->buffers, sizeof(struct pipe_buffer),
+	bufs = kvmalloc_array(pipe->nrbufs, sizeof(struct pipe_buffer),
 			      GFP_KERNEL);
 	if (!bufs) {
 		pipe_unlock(pipe);