This is a note to let you know that I've just added the patch titled
drm/rockchip: vop2: Don't crash for invalid duplicate_state
to the 6.6-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-rockchip-vop2-don-t-crash-for-invalid-duplicate_.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 83fdb1898f163f030cfaec9a196d14bea8a76a76
Author: Jonas Karlman <jonas@xxxxxxxxx>
Date: Wed Jun 21 22:33:21 2023 +0000
drm/rockchip: vop2: Don't crash for invalid duplicate_state
[ Upstream commit 342f7e4967d02b0ec263b15916304fc54841b608 ]
It's possible for users to try to duplicate the CRTC state even when the
state doesn't exist. drm_atomic_helper_crtc_duplicate_state() (and other
users of __drm_atomic_helper_crtc_duplicate_state()) already guard this
with a WARN_ON() instead of crashing, so let's do that here too.
Fixes: 604be85547ce ("drm/rockchip: Add VOP2 driver")
Signed-off-by: Jonas Karlman <jonas@xxxxxxxxx>
Reviewed-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20230621223311.2239547-5-jonas@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
index 583df4d22f7e9..d843c19c146db 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
@@ -2098,11 +2098,13 @@ static void vop2_crtc_reset(struct drm_crtc *crtc)
static struct drm_crtc_state *vop2_crtc_duplicate_state(struct drm_crtc *crtc)
{
- struct rockchip_crtc_state *vcstate, *old_vcstate;
+ struct rockchip_crtc_state *vcstate;
- old_vcstate = to_rockchip_crtc_state(crtc->state);
+ if (WARN_ON(!crtc->state))
+ return NULL;
- vcstate = kmemdup(old_vcstate, sizeof(*old_vcstate), GFP_KERNEL);
+ vcstate = kmemdup(to_rockchip_crtc_state(crtc->state),
+ sizeof(*vcstate), GFP_KERNEL);
if (!vcstate)
return NULL;
