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ksmbd: no response from compound read

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[ Upstream commit e202a1e863 ]

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 <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Namjae Jeon 2023-07-23 15:22:33 +09:00 committed by Greg Kroah-Hartman
parent becb5191d1
commit 99a2426b13
1 changed files with 5 additions and 0 deletions
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5
fs/smb/server/smb2pdu.c
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@ -6314,6 +6314,11 @@ 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)) {