[PATCH] v9fs: fix vfs_inode dereference before NULL check

__getname, which in turn will call kmem_cache_alloc, may return NULL.

Coverity bug #977

Signed-off-by: Eugene Teo <eugene.teo@eugeneteo.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index dc67f83d0dae..4cbfb714c6e4 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -1244,6 +1244,8 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
                 return -EINVAL;
 
         name = __getname();
+        if (!name)
+                return -ENOMEM;
         /* build extension */
         if (S_ISBLK(mode))
                 sprintf(name, "b %u %u", MAJOR(rdev), MINOR(rdev));