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authorSanchit Garg <sancgarg@linux.vnet.ibm.com>2010-10-27 09:41:01 +0530
committerEric Van Hensbergen <ericvh@gmail.com>2010-10-28 09:08:49 -0500
commitf6ac55b6c156cebf750376dc08e06ffdade82717 (patch)
treefd173ac547ec84f90b56cf6d8a90f737b4b2748f /net
parentb165d60145b717261a0234f989c442c2b68b6ec0 (diff)
downloadlinux-2.6.38-lt-ux500-f6ac55b6c156cebf750376dc08e06ffdade82717.tar.gz
net/9p: Return error on read with NULL buffer
This patch ensures that a read(fd, NULL, 10) returns EFAULT on a 9p file. Signed-off-by: Sanchit Garg <sancgarg@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'net')
-rw-r--r--net/9p/client.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/net/9p/client.c b/net/9p/client.c
index 8df80fb86f2..a848bca9fbf 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1286,16 +1286,13 @@ p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,
if (data) {
memmove(data, dataptr, count);
- }
-
- if (udata) {
+ } else {
err = copy_to_user(udata, dataptr, count);
if (err) {
err = -EFAULT;
goto free_and_error;
}
}
-
p9_free_req(clnt, req);
return count;