4.2.8-ckt1 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
commit cadfbb6ec2e55171479191046142c927a8b12d87 upstream.
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Reported-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
fs/dax.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/dax.c b/fs/dax.c
index ef35a20..a3eb5b0 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -162,8 +162,10 @@ 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;
--
1.9.1
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