FAILED: patch "[PATCH] ksmbd: fix Out-of-Bounds Write in ksmbd_vfs_stream_write" failed to apply to 5.15-stable tree

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x 313dab082289e460391c82d855430ec8a28ddf81
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2024121007-alongside-neuter-46d3@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 313dab082289e460391c82d855430ec8a28ddf81 Mon Sep 17 00:00:00 2001
From: Jordy Zomer <[email protected]>
Date: Thu, 28 Nov 2024 09:33:25 +0900
Subject: [PATCH] ksmbd: fix Out-of-Bounds Write in ksmbd_vfs_stream_write

An offset from client could be a negative value, It could allows to write data outside the bounds of the allocated buffer. Note that this issue is coming when setting
'vfs objects = streams_xattr parameter' in ksmbd.conf.

index 7b6a3952f228..23879555880f 100644
@@ -6882,6 +6882,8 @@ int smb2_write(struct ksmbd_work *work)
 	}
 
 	offset = le64_to_cpu(req->Offset);
+	if (offset < 0)
+		return -EINVAL;
 	length = le32_to_cpu(req->Length);
 
 	if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||