This is a note to let you know that I've just added the patch titled
ksmbd: handle malformed smb1 message
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ksmbd-handle-malformed-smb1-message.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5a5409d90bd05f87fe5623a749ccfbf3f7c7d400 Mon Sep 17 00:00:00 2001
From: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Date: Tue, 7 Nov 2023 21:04:31 +0900
Subject: ksmbd: handle malformed smb1 message
From: Namjae Jeon <linkinjeon@xxxxxxxxxx>
commit 5a5409d90bd05f87fe5623a749ccfbf3f7c7d400 upstream.
If set_smb1_rsp_status() is not implemented, It will cause NULL pointer
dereferece error when client send malformed smb1 message.
This patch add set_smb1_rsp_status() to ignore malformed smb1 message.
Cc: stable@xxxxxxxxxxxxxxx
Reported-by: Robert Morris <rtm@xxxxxxxxxxxxx>
Signed-off-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/smb/server/smb_common.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/fs/smb/server/smb_common.c
+++ b/fs/smb/server/smb_common.c
@@ -372,11 +372,22 @@ static int smb1_allocate_rsp_buf(struct
return 0;
}
+/**
+ * set_smb1_rsp_status() - set error type in smb response header
+ * @work: smb work containing smb response header
+ * @err: error code to set in response
+ */
+static void set_smb1_rsp_status(struct ksmbd_work *work, __le32 err)
+{
+ work->send_no_response = 1;
+}
+
static struct smb_version_ops smb1_server_ops = {
.get_cmd_val = get_smb1_cmd_val,
.init_rsp_hdr = init_smb1_rsp_hdr,
.allocate_rsp_buf = smb1_allocate_rsp_buf,
.check_user_session = smb1_check_user_session,
+ .set_rsp_status = set_smb1_rsp_status,
};
static int smb1_negotiate(struct ksmbd_work *work)
Patches currently in stable-queue which might be from linkinjeon@xxxxxxxxxx are
queue-6.1/ksmbd-handle-malformed-smb1-message.patch
queue-6.1/exfat-support-handle-zero-size-directory.patch
queue-6.1/ksmbd-fix-slab-out-of-bounds-write-in-smb_inherit_dacl.patch
