From eb7ad98797ba117b37c07517793e836ac58f33c8 Mon Sep 17 00:00:00 2001
From: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Date: Wed, 9 Mar 2011 11:49:13 -0600
Subject: [PATCH] eCryptfs: Unlock page in write_begin error path

commit 50f198ae16ac66508d4b8d5a40967a8507ad19ee upstream.

Unlock the page in error path of ecryptfs_write_begin(). This may
happen, for example, if decryption fails while bring the page
up-to-date.

Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 fs/ecryptfs/mmap.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index cc64fca89f8..eb9d9672ebd 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -374,6 +374,11 @@ static int ecryptfs_write_begin(struct file *file,
 	    && (pos != 0))
 		zero_user(page, 0, PAGE_CACHE_SIZE);
 out:
+	if (unlikely(rc)) {
+		unlock_page(page);
+		page_cache_release(page);
+		*pagep = NULL;
+	}
 	return rc;
 }
 
-- 
2.11.4.GIT