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authorPeter Staubach <staubach@redhat.com>2005-11-07 00:59:42 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:39 -0800
commit6fdcc2162285a8fc96ab12ff85086c37bceaa494 (patch)
tree957c0a2c2c273f6f13d8b9f95412f71856b5d449
parent5c7ad5104d8ecf2c3a6428d73748126e91b1a250 (diff)
[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 <staubach@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/open.c9
1 files changed, 8 insertions, 1 deletions
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);
}