linux-kernel - [PATCH 1/1] ufs: missing check for block_truncate

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Message-Id: <1427247076-9873-1-git-send-email-csong84@gatech.edu>
Date:	Tue, 24 Mar 2015 21:31:16 -0400
From:	Chengyu Song <csong84@...ech.edu>
To:	dushistov@...l.ru, linux-kernel@...r.kernel.org
Cc:	taesoo@...ech.edu, changwoo@...ech.edu, sanidhya@...ech.edu,
	blee@...ech.edu, csong84@...ech.edu
Subject: [PATCH 1/1] ufs: missing check for block_truncate_page

block_truncate_page may fail under certain circumstances, so its result
should be checked.

Signed-off-by: Chengyu Song <csong84@...ech.edu>
---
 fs/ufs/truncate.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/ufs/truncate.c b/fs/ufs/truncate.c
index f04f89f..8b41f07 100644
--- a/fs/ufs/truncate.c
+++ b/fs/ufs/truncate.c
@@ -464,7 +464,12 @@ int ufs_truncate(struct inode *inode, loff_t old_i_size)
 		goto out;
 	}
 
-	block_truncate_page(inode->i_mapping, inode->i_size, ufs_getfrag_block);
+	err = block_truncate_page(inode->i_mapping, inode->i_size, ufs_getfrag_block);
+
+	if (err) {
+		i_size_write(inode, old_i_size);
+		goto out;
+	}
 
 	while (1) {
 		retry = ufs_trunc_direct(inode);
-- 
2.1.0

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