linux-ext4 - [PATCH] [v2] ext4: Fix error handling code in add_new

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Message-Id: <20200829025403.3139-1-dinghao.liu@zju.edu.cn>
Date:   Sat, 29 Aug 2020 10:54:02 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     "Theodore Ts'o" <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] [v2] ext4: Fix error handling code in add_new_gdb

When ext4_journal_get_write_access() fails, we should
terminate the execution flow and release n_group_desc,
iloc.bh, dind and gdb_bh.

Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---

Changelog:

v2: - Remove changes to ext4_handle_dirty_super()'s
      error handling path.
---
 fs/ext4/resize.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index a50b51270ea9..71bf600e5b42 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -843,8 +843,10 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
 
 	BUFFER_TRACE(dind, "get_write_access");
 	err = ext4_journal_get_write_access(handle, dind);
-	if (unlikely(err))
+	if (unlikely(err)) {
 		ext4_std_error(sb, err);
+		goto errout;
+	}
 
 	/* ext4_reserve_inode_write() gets a reference on the iloc */
 	err = ext4_reserve_inode_write(handle, inode, &iloc);
-- 
2.17.1