linux-kernel - [PATCH 4.4 090/100] NFS: Fix memory leaks in nfs_pageio_stop

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200422095039.204367531@linuxfoundation.org>
Date:   Wed, 22 Apr 2020 11:57:00 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 090/100] NFS: Fix memory leaks in nfs_pageio_stop_mirroring()

From: Trond Myklebust <trond.myklebust@...merspace.com>

[ Upstream commit 862f35c94730c9270833f3ad05bd758a29f204ed ]

If we just set the mirror count to 1 without first clearing out
the mirrors, we can leak queued up requests.

Signed-off-by: Trond Myklebust <trond.myklebust@...merspace.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/nfs/pagelist.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index af1bb7353792c..f5de58c5773f6 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -886,15 +886,6 @@ static int nfs_pageio_setup_mirroring(struct nfs_pageio_descriptor *pgio,
 	return 0;
 }
 
-/*
- * nfs_pageio_stop_mirroring - stop using mirroring (set mirror count to 1)
- */
-void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio)
-{
-	pgio->pg_mirror_count = 1;
-	pgio->pg_mirror_idx = 0;
-}
-
 static void nfs_pageio_cleanup_mirroring(struct nfs_pageio_descriptor *pgio)
 {
 	pgio->pg_mirror_count = 1;
@@ -1287,6 +1278,14 @@ void nfs_pageio_cond_complete(struct nfs_pageio_descriptor *desc, pgoff_t index)
 	}
 }
 
+/*
+ * nfs_pageio_stop_mirroring - stop using mirroring (set mirror count to 1)
+ */
+void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio)
+{
+	nfs_pageio_complete(pgio);
+}
+
 int __init nfs_init_nfspagecache(void)
 {
 	nfs_page_cachep = kmem_cache_create("nfs_page",
-- 
2.20.1