linux-kernel - [PATCH 8/9] fs: nfs: misused copy_to

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Message-Id: <1280488190-20979-1-git-send-email-segooon@gmail.com>
Date:	Fri, 30 Jul 2010 15:09:50 +0400
From:	Kulikov Vasiliy <segooon@...il.com>
To:	kernel-janitors@...r.kernel.org
Cc:	Trond Myklebust <Trond.Myklebust@...app.com>,
	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 8/9] fs: nfs: misused copy_to_user() return value

copy_to_user() returns nonzero value on error, this value may be any
value between 0 and requested count, not only requested count.

Signed-off-by: Kulikov Vasiliy <segooon@...il.com>
---
 fs/nfs/idmap.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index 21a84d4..a9f2cd5 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -362,7 +362,7 @@ idmap_pipe_upcall(struct file *filp, struct rpc_pipe_msg *msg,
 	unsigned long left;
 
 	left = copy_to_user(dst, data, mlen);
-	if (left == mlen) {
+	if (left)
 		msg->errno = -EFAULT;
 		return -EFAULT;
 	}
-- 
1.7.0.4

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