[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20240514101001.236155901@linuxfoundation.org>
Date: Tue, 14 May 2024 12:20:46 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: stable@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
patches@...ts.linux.dev,
Zack Rusin <zack.rusin@...adcom.com>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org,
Maaz Mombasawala <maaz.mombasawala@...adcom.com>,
Martin Krastev <martin.krastev@...adcom.com>,
zdi-disclosures@...ndmicro.com
Subject: [PATCH 5.10 108/111] drm/vmwgfx: Fix invalid reads in fence signaled events
5.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zack Rusin <zack.rusin@...adcom.com>
commit a37ef7613c00f2d72c8fc08bd83fb6cc76926c8c upstream.
Correctly set the length of the drm_event to the size of the structure
that's actually used.
The length of the drm_event was set to the parent structure instead of
to the drm_vmw_event_fence which is supposed to be read. drm_read
uses the length parameter to copy the event to the user space thus
resuling in oob reads.
Signed-off-by: Zack Rusin <zack.rusin@...adcom.com>
Fixes: 8b7de6aa8468 ("vmwgfx: Rework fence event action")
Reported-by: zdi-disclosures@...ndmicro.com # ZDI-CAN-23566
Cc: David Airlie <airlied@...il.com>
CC: Daniel Vetter <daniel@...ll.ch>
Cc: Zack Rusin <zack.rusin@...adcom.com>
Cc: Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>
Cc: dri-devel@...ts.freedesktop.org
Cc: linux-kernel@...r.kernel.org
Cc: <stable@...r.kernel.org> # v3.4+
Reviewed-by: Maaz Mombasawala <maaz.mombasawala@...adcom.com>
Reviewed-by: Martin Krastev <martin.krastev@...adcom.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240425192748.1761522-1-zack.rusin@broadcom.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/gpu/drm/vmwgfx/vmwgfx_fence.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_fence.c
@@ -1066,7 +1066,7 @@ static int vmw_event_fence_action_create
}
event->event.base.type = DRM_VMW_EVENT_FENCE_SIGNALED;
- event->event.base.length = sizeof(*event);
+ event->event.base.length = sizeof(event->event);
event->event.user_data = user_data;
ret = drm_event_reserve_init(dev, file_priv, &event->base, &event->event.base);
Powered by blists - more mailing lists