linux-kernel - [PATCH 1/3] jbd2: fix potential double free

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Date:   Sun,  5 May 2019 19:01:02 +0800
From:   Chengguang Xu <cgxu519@...il.com>
To:     jack@...e.com, tytso@....edu
Cc:     linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chengguang Xu <cgxu519@...il.com>
Subject: [PATCH 1/3] jbd2: fix potential double free

When fail from creating cache jbd2_inode_cache, we will
destroy previously created cache jbd2_handle_cache twice.
This patch fixes it by removing first destroy in error path.

Signed-off-by: Chengguang Xu <cgxu519@...il.com>
---
 fs/jbd2/journal.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 382c030cc78b..49797854ccb8 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -2642,7 +2642,6 @@ static int __init jbd2_journal_init_handle_cache(void)
 	jbd2_inode_cache = KMEM_CACHE(jbd2_inode, 0);
 	if (jbd2_inode_cache == NULL) {
 		printk(KERN_EMERG "JBD2: failed to create inode cache\n");
-		kmem_cache_destroy(jbd2_handle_cache);
 		return -ENOMEM;
 	}
 	return 0;
-- 
2.20.1