linux-ext4 - [PATCH v2 1/9] jbd2: avoid memleak in jbd2_journal_write_metadata

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Date: Tue, 14 May 2024 19:24:30 +0800
From: Kemeng Shi <shikemeng@...weicloud.com>
To: tytso@....edu,
	jack@...e.com,
	yi.zhang@...weicloud.com
Cc: linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/9] jbd2: avoid memleak in jbd2_journal_write_metadata_buffer

The new_bh is from alloc_buffer_head, we should call free_buffer_head to
free it in error case.

Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
Reviewed-by: Zhang Yi <yi.zhang@...wei.com>
Reviewed-by: Jan Kara <jack@...e.cz>
---
 fs/jbd2/journal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index b6c114c11b97..207b24e12ce9 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -399,6 +399,7 @@ int jbd2_journal_write_metadata_buffer(transaction_t *transaction,
 		tmp = jbd2_alloc(bh_in->b_size, GFP_NOFS);
 		if (!tmp) {
 			brelse(new_bh);
+			free_buffer_head(new_bh);
 			return -ENOMEM;
 		}
 		spin_lock(&jh_in->b_state_lock);
-- 
2.30.0