linux-kernel - [PATCH AUTOSEL for 4.14 068/110] afs: Fix missing error handling in afs_write

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Message-ID: <20180203180015.29073-68-alexander.levin@microsoft.com>
Date:   Sat, 3 Feb 2018 18:01:01 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
CC:     David Howells <dhowells@...hat.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.14 068/110] afs: Fix missing error handling in
 afs_write_end()

From: David Howells <dhowells@...hat.com>

[ Upstream commit afae457d874860a7e299d334f59eede5f3ad4b47 ]

afs_write_end() is missing page unlock and put if afs_fill_page() fails.

Reported-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: David Howells <dhowells@...hat.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 fs/afs/write.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/fs/afs/write.c b/fs/afs/write.c
index 106e43db1115..926d4d68f791 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -282,7 +282,7 @@ int afs_write_end(struct file *file, struct address_space *mapping,
 			ret = afs_fill_page(vnode, key, pos + copied,
 					    len - copied, page);
 			if (ret < 0)
-				return ret;
+				goto out;
 		}
 		SetPageUptodate(page);
 	}
@@ -290,10 +290,12 @@ int afs_write_end(struct file *file, struct address_space *mapping,
 	set_page_dirty(page);
 	if (PageDirty(page))
 		_debug("dirtied");
+	ret = copied;
+
+out:
 	unlock_page(page);
 	put_page(page);
-
-	return copied;
+	return ret;
 }
 
 /*
-- 
2.11.0