From cadfbb6ec2e55171479191046142c927a8b12d87 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Tue, 10 Nov 2015 19:42:49 -0700 Subject: dax_io(): don't let non-error value escape via retval instead of EFAULT Signed-off-by: Al Viro Reported-by: Sasha Levin Cc: stable@vger.kernel.org # 4.0+ Signed-off-by: Jens Axboe --- fs/dax.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'fs/dax.c') diff --git a/fs/dax.c b/fs/dax.c index a86d3cc2b389..7b653e9aa8d1 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -169,8 +169,10 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter, else len = iov_iter_zero(max - pos, iter); - if (!len) + if (!len) { + retval = -EFAULT; break; + } pos += len; addr += len; -- cgit v1.2.3