This is a note to let you know that I've just added the patch titled
NFSv4: Fix a dentry leak on alias use
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsv4-fix-a-dentry-leak-on-alias-use.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From d9dfd8d741683347ee159d25f5b50c346a0df557 Mon Sep 17 00:00:00 2001
From: Benjamin Coddington <bcodding@xxxxxxxxxx>
Date: Wed, 17 Feb 2016 10:41:41 -0500
Subject: NFSv4: Fix a dentry leak on alias use
From: Benjamin Coddington <bcodding@xxxxxxxxxx>
commit d9dfd8d741683347ee159d25f5b50c346a0df557 upstream.
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@xxxxxxxxxx>
Fixes: 275bb307865a3 ("NFSv4: Move dentry instantiation into the NFSv4-...")
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/nfs/nfs4proc.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2187,9 +2187,9 @@ static int _nfs4_open_and_get_state(stru
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(opendata->dir->d_inode));
Patches currently in stable-queue which might be from bcodding@xxxxxxxxxx are
queue-3.14/nfsv4-fix-a-dentry-leak-on-alias-use.patch
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