This is a note to let you know that I've just added the patch titled
Drivers: hv: utils: use memdup_user in hvt_op_write
to the 4.4-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:
drivers-hv-utils-use-memdup_user-in-hvt_op_write.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b00359642c2427da89dc8f77daa2c9e8a84e6d76 Mon Sep 17 00:00:00 2001
From: Olaf Hering <olaf@xxxxxxxxx>
Date: Mon, 14 Dec 2015 16:01:37 -0800
Subject: Drivers: hv: utils: use memdup_user in hvt_op_write
From: Olaf Hering <olaf@xxxxxxxxx>
commit b00359642c2427da89dc8f77daa2c9e8a84e6d76 upstream.
Use memdup_user to handle OOM.
Fixes: 14b50f80c32d ('Drivers: hv: util: introduce hv_utils_transport abstraction')
Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hv/hv_utils_transport.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
--- a/drivers/hv/hv_utils_transport.c
+++ b/drivers/hv/hv_utils_transport.c
@@ -80,11 +80,10 @@ static ssize_t hvt_op_write(struct file
hvt = container_of(file->f_op, struct hvutil_transport, fops);
- inmsg = kzalloc(count, GFP_KERNEL);
- if (copy_from_user(inmsg, buf, count)) {
- kfree(inmsg);
- return -EFAULT;
- }
+ inmsg = memdup_user(buf, count);
+ if (IS_ERR(inmsg))
+ return PTR_ERR(inmsg);
+
if (hvt->on_msg(inmsg, count))
return -EFAULT;
kfree(inmsg);
Patches currently in stable-queue which might be from olaf@xxxxxxxxx are
queue-4.4/drivers-hv-utils-use-memdup_user-in-hvt_op_write.patch
