From e202a1e8634b186da38cbbff85382ea2b9e297cf Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Sun, 23 Jul 2023 15:22:33 +0900 Subject: [PATCH] ksmbd: no response from compound read ksmbd doesn't support compound read. If client send read-read in compound to ksmbd, there can be memory leak from read buffer. Windows and linux clients doesn't send it to server yet. For now, No response from compound read. compound read will be supported soon. Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-21587, ZDI-CAN-21588 Signed-off-by: Namjae Jeon Signed-off-by: Steve French --- fs/smb/server/smb2pdu.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c index efe00beafd15c..9849d74893459 100644 --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -6214,6 +6214,11 @@ int smb2_read(struct ksmbd_work *work) unsigned int max_read_size = conn->vals->max_read_size; WORK_BUFFERS(work, req, rsp); + if (work->next_smb2_rcv_hdr_off) { + work->send_no_response = 1; + err = -EOPNOTSUPP; + goto out; + } if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { -- 2.30.2