From 6fdcc2162285a8fc96ab12ff85086c37bceaa494 Mon Sep 17 00:00:00 2001 From: Peter Staubach Date: Mon, 7 Nov 2005 00:59:42 -0800 Subject: [PATCH] [PATCH] memory leak in dentry_open() There is a memory leak possible in dentry_open(). If get_empty_filp() fails, then the references to dentry and mnt need to be released. The attached patch adds the calls to dput() and mntput() to release these two references. Signed-off-by: Peter Staubach Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/open.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/fs/open.c b/fs/open.c index 8d06ec911fd9..2835f096c683 100644 --- a/fs/open.c +++ b/fs/open.c @@ -887,6 +887,10 @@ struct file *nameidata_to_filp(struct nameidata *nd, int flags) return filp; } +/* + * dentry_open() will have done dput(dentry) and mntput(mnt) if it returns an + * error. + */ struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags) { int error; @@ -894,8 +898,11 @@ struct file *dentry_open(struct dentry *dentry, struct vfsmount *mnt, int flags) error = -ENFILE; f = get_empty_filp(); - if (f == NULL) + if (f == NULL) { + dput(dentry); + mntput(mnt); return ERR_PTR(error); + } return __dentry_open(dentry, mnt, flags, f, NULL); }