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ksmbd: fix slab-use-after-free in smb3_preauth_hash_rsp

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commit b8fc56fbca7482c1e5c0e3351c6ae78982e25ada upstream.

ksmbd_user_session_put should be called under smb3_preauth_hash_rsp().
It will avoid freeing session before calling smb3_preauth_hash_rsp().

Cc: stable@vger.kernel.org # v5.15+
Reported-by: Norbert Szetei <norbert@doyensec.com>
Tested-by: Norbert Szetei <norbert@doyensec.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Namjae Jeon
2024-11-04 13:40:41 +09:00
committed by Greg Kroah-Hartman
parent d8664ce789
commit f7557bbca4
1 changed files with 2 additions and 2 deletions
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4
fs/smb/server/server.c
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@@ -238,11 +238,11 @@ static void __handle_ksmbd_work(struct ksmbd_work *work,
} while (is_chained == true);
send:
if (work->sess)
ksmbd_user_session_put(work->sess);
if (work->tcon)
ksmbd_tree_connect_put(work->tcon);
smb3_preauth_hash_rsp(work);
if (work->sess)
ksmbd_user_session_put(work->sess);
if (work->sess && work->sess->enc && work->encrypted &&
conn->ops->encrypt_resp) {
rc = conn->ops->encrypt_resp(work);