This is a note to let you know that I've just added the patch titled
drm: crtc: integer overflow in drm_property_create_blob()
to the 4.2-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:
drm-crtc-integer-overflow-in-drm_property_create_blob.patch
and it can be found in the queue-4.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9ac0934bbe52290e4e4c2a58ec41cab9b6ca8c96 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Thu, 29 Oct 2015 16:37:54 +0300
Subject: drm: crtc: integer overflow in drm_property_create_blob()
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
commit 9ac0934bbe52290e4e4c2a58ec41cab9b6ca8c96 upstream.
The size here comes from the user via the ioctl, it is a number between
1-u32max so the addition here could overflow on 32 bit systems.
Fixes: f453ba046074 ('DRM: add mode setting support')
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: Daniel Stone <daniels@xxxxxxxxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_crtc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -4221,7 +4221,7 @@ drm_property_create_blob(struct drm_devi
struct drm_property_blob *blob;
int ret;
- if (!length)
+ if (!length || length > ULONG_MAX - sizeof(struct drm_property_blob))
return ERR_PTR(-EINVAL);
blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
Patches currently in stable-queue which might be from dan.carpenter@xxxxxxxxxx are
queue-4.2/drm-crtc-integer-overflow-in-drm_property_create_blob.patch
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