linux-kernel - [PATCH 3.16 058/305] ext4: initialize retries variable in ext4_da_write_inline_data

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Message-ID: <lsq.1549201508.604712795@decadent.org.uk>
Date:   Sun, 03 Feb 2019 14:45:08 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Lukas Czerner" <lczerner@...hat.com>,
        "Theodore Ts'o" <tytso@....edu>
Subject: [PATCH 3.16 058/305] ext4: initialize retries variable in
 ext4_da_write_inline_data_begin()

3.16.63-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Lukas Czerner <lczerner@...hat.com>

commit 625ef8a3acd111d5f496d190baf99d1a815bd03e upstream.

Variable retries is not initialized in ext4_da_write_inline_data_begin()
which can lead to nondeterministic number of retries in case we hit
ENOSPC. Initialize retries to zero as we do everywhere else.

Signed-off-by: Lukas Czerner <lczerner@...hat.com>
Signed-off-by: Theodore Ts'o <tytso@....edu>
Fixes: bc0ca9df3b2a ("ext4: retry allocation when inline->extent conversion failed")
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 fs/ext4/inline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -859,7 +859,7 @@ int ext4_da_write_inline_data_begin(stru
 	handle_t *handle;
 	struct page *page;
 	struct ext4_iloc iloc;
-	int retries;
+	int retries = 0;
 
 	ret = ext4_get_inode_loc(inode, &iloc);
 	if (ret)