linux-kernel - [PATCH] Check for Null return from logfs_readpage_nolock in btree_write

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Date:	Mon, 16 Jun 2014 15:47:01 -0400
From:	Nicholas Krause <xerofoify@...il.com>
To:	joern@...fs.org
Cc:	prasadjoshi.linux@...il.com, logfs@...fs.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] Check for Null return from logfs_readpage_nolock in btree_write_block

Signed-off-by: Nicholas Krause <xerofoify@...il.com>
---
 fs/logfs/readwrite.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/logfs/readwrite.c b/fs/logfs/readwrite.c
index 4814031..adb9233 100644
--- a/fs/logfs/readwrite.c
+++ b/fs/logfs/readwrite.c
@@ -2210,6 +2210,8 @@ void btree_write_block(struct logfs_block *block)
 	page = logfs_get_write_page(inode, block->bix, block->level);
 
 	err = logfs_readpage_nolock(page);
+	if (!err)
+		return -ENOMEM;
 	BUG_ON(err);
 	BUG_ON(!PagePrivate(page));
 	BUG_ON(logfs_block(page) != block);
-- 
1.9.1

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