[34-longterm 151/196] cifs: fix another memleak, in cifs_root_iget

From: Paul Gortmaker
Date: Mon Mar 12 2012 - 20:39:00 EST


From: Oskar Schirmer <oskar@xxxxxxxxx>

-------------------
This is a commit scheduled for the next v2.6.34 longterm release.
If you see a problem with using this for longterm, please comment.
-------------------

commit a7851ce73b9fdef53f251420e6883cf4f3766534 upstream.

cifs_root_iget allocates full_path through
cifs_build_path_to_root, but fails to kfree it upon
cifs_get_inode_info* failure.

Make all failure exit paths traverse clean up
handling at the end of the function.

Signed-off-by: Oskar Schirmer <oskar@xxxxxxxxx>
Reviewed-by: Jesper Juhl <jj@xxxxxxxxxxxxx>
Signed-off-by: Steve French <sfrench@xxxxxxxxxx>
Signed-off-by: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
---
fs/cifs/inode.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 49b47c3..da3e83f 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -793,8 +793,10 @@ struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
rc = cifs_get_inode_info(&inode, full_path, NULL, sb,
xid, NULL);

- if (!inode)
- return ERR_PTR(-ENOMEM);
+ if (!inode) {
+ inode = ERR_PTR(-ENOMEM);
+ goto out;
+ }

if (rc && cifs_sb->tcon->ipc) {
cFYI(1, ("ipc connection - fake read inode"));
@@ -805,13 +807,11 @@ struct inode *cifs_root_iget(struct super_block *sb, unsigned long ino)
inode->i_uid = cifs_sb->mnt_uid;
inode->i_gid = cifs_sb->mnt_gid;
} else if (rc) {
- kfree(full_path);
- _FreeXid(xid);
iget_failed(inode);
- return ERR_PTR(rc);
+ inode = ERR_PTR(rc);
}

-
+out:
kfree(full_path);
/* can not call macro FreeXid here since in a void func
* TODO: This is no longer true
--
1.7.9.3

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