Commit d9dfd8d7 authored Feb 17, 2016 by Benjamin Coddington Committed by Trond Myklebust Feb 17, 2016

NFSv4: Fix a dentry leak on alias use

In the case where d_add_unique() finds an appropriate alias to use it will
have already incremented the reference count. An additional dget() to swap
the open context's dentry is unnecessary and will leak a reference.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Fixes: 275bb307 ("NFSv4: Move dentry instantiation into the NFSv4-...")
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

parent e0fa0d01

fs/nfs/nfs4proc.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -2466,9 +2466,9 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
		dentry = d_add_unique(dentry, igrab(state->inode));
		if (dentry == NULL) {
		dentry = opendata->dentry;
		} else if (dentry != ctx->dentry) {
		} else {
		dput(ctx->dentry);
		ctx->dentry = dget(dentry);
		ctx->dentry = dentry;
		}
		nfs_set_verifier(dentry,
		nfs_save_change_attribute(d_inode(opendata->dir)));