[PATCH AUTOSEL 4.19 3/5] jbd2: avoid memleak in jbd2_journal_write_metadata_buffer

[Sasha Levin <sashal@kernel.org>]

From: Kemeng Shi <shikemeng@huaweicloud.com>

[ Upstream commit cc102aa24638b90e04364d64e4f58a1fa91a1976 ]

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@huaweicloud.com>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20240514112438.1269037-2-shikemeng@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/jbd2/journal.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 629928b19e487..08cff80f8c297 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -430,6 +430,7 @@ 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;
 		}
 		jbd_lock_bh_state(bh_in);
-- 
2.43.0