2021년 11월 24일 (수) 오후 1:46, Namjae Jeon linkinjeon@kernel.org님이 작성:

Fix memleak in get_file_stream_info()

Fixes: 34061d6b76a4 ("ksmbd: validate OutputBufferLength of QUERY_DIR, QUERY_INFO, IOCTL requests") Cc: stable@vger.kernel.org # v5.15 Reported-by: Coverity Scan scan-admin@coverity.com Signed-off-by: Namjae Jeon linkinjeon@kernel.org

---

Acked-by: Hyunchul Lee hyc.lee@gmail.com

fs/ksmbd/smb2pdu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index 2067d5bab1b0..c70972b49da8 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -4496,8 +4496,10 @@ static void get_file_stream_info(struct ksmbd_work *work, ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);

            next = sizeof(struct smb2_file_stream_info) + streamlen * 2;

•           if (next > buf_free_len)
  

•           if (next > buf_free_len) {
  

•                   kfree(stream_buf);
                    break;
  

•           }
  
            file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
            streamlen  = smbConvertToUTF16((__le16 *)file_info->StreamName,
  

-- 2.25.1