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Message-Id: <20200227132234.778031974@linuxfoundation.org>
Date: Thu, 27 Feb 2020 14:35:51 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Wenwen Wang <wenwen@...uga.edu>,
Tyler Hicks <tyhicks@...onical.com>
Subject: [PATCH 5.5 014/150] ecryptfs: fix a memory leak bug in parse_tag_1_packet()
From: Wenwen Wang <wenwen@...uga.edu>
commit fe2e082f5da5b4a0a92ae32978f81507ef37ec66 upstream.
In parse_tag_1_packet(), if tag 1 packet contains a key larger than
ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES, no cleanup is executed, leading to a
memory leak on the allocated 'auth_tok_list_item'. To fix this issue, go to
the label 'out_free' to perform the cleanup work.
Cc: stable@...r.kernel.org
Fixes: dddfa461fc89 ("[PATCH] eCryptfs: Public key; packet management")
Signed-off-by: Wenwen Wang <wenwen@...uga.edu>
Signed-off-by: Tyler Hicks <tyhicks@...onical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
fs/ecryptfs/keystore.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -1304,7 +1304,7 @@ parse_tag_1_packet(struct ecryptfs_crypt
printk(KERN_WARNING "Tag 1 packet contains key larger "
"than ECRYPTFS_MAX_ENCRYPTED_KEY_BYTES\n");
rc = -EINVAL;
- goto out;
+ goto out_free;
}
memcpy((*new_auth_tok)->session_key.encrypted_key,
&data[(*packet_size)], (body_size - (ECRYPTFS_SIG_SIZE + 2)));
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