aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorMiklos Szeredi <mszeredi@suse.cz>2013-07-17 14:53:53 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-07-28 16:30:08 -0700
commit223828d8a6ef53f7671351fe5d08f18dca714830 (patch)
tree6a450f60b7fae6d7d37aab0637719f0cecfe7df9
parentdc2a6c2d3e9a2529b3ffc70c165cbb10c85768f5 (diff)
downloadlinux-linaro-stable-223828d8a6ef53f7671351fe5d08f18dca714830.tar.gz
fuse: readdirplus: sanity checks
commit a28ef45cbb1e7fadd5159deb17b02de15c6e4aaf upstream. Add sanity checks before adding or updating an entry with data received from readdirplus. Signed-off-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--fs/fuse/dir.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index a71df0206f6f..5b1274699b08 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -1225,6 +1225,12 @@ static int fuse_direntplus_link(struct file *file,
if (name.name[1] == '.' && name.len == 2)
return 0;
}
+
+ if (invalid_nodeid(o->nodeid))
+ return -EIO;
+ if (!fuse_valid_type(o->attr.mode))
+ return -EIO;
+
fc = get_fuse_conn(dir);
name.hash = full_name_hash(name.name, name.len);
@@ -1233,10 +1239,14 @@ static int fuse_direntplus_link(struct file *file,
inode = dentry->d_inode;
if (!inode) {
d_drop(dentry);
- } else if (get_node_id(inode) != o->nodeid) {
+ } else if (get_node_id(inode) != o->nodeid ||
+ ((o->attr.mode ^ inode->i_mode) & S_IFMT)) {
err = d_invalidate(dentry);
if (err)
goto out;
+ } else if (is_bad_inode(inode)) {
+ err = -EIO;
+ goto out;
} else {
struct fuse_inode *fi;
fi = get_fuse_inode(inode);