linux-kernel - [PATCH v2 3/3] fs/fuse, splice_write: reduce allocation size.

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Message-Id: <20180717160035.9422-3-aryabinin@virtuozzo.com>
Date:   Tue, 17 Jul 2018 19:00:35 +0300
From:   Andrey Ryabinin <aryabinin@...tuozzo.com>
To:     Miklos Szeredi <miklos@...redi.hu>
Cc:     linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andrey Ryabinin <aryabinin@...tuozzo.com>
Subject: [PATCH v2 3/3] fs/fuse, splice_write: reduce allocation size.

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@...tuozzo.com>
---
 fs/fuse/dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index fd4a838c1673..d78af3c146f9 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -1946,7 +1946,7 @@ 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);
-- 
2.16.4