linux-kernel - Re: linux-next: build failure after merge of the kspp tree

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20220125140221.5c1f4640@canb.auug.org.au>
Date:   Tue, 25 Jan 2022 14:02:21 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Kees Cook <keescook@...omium.org>
Cc:     "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Edmund Dea <edmund.j.dea@...el.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Anitha Chrisanthus <anitha.chrisanthus@...el.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>
Subject: Re: linux-next: build failure after merge of the kspp tree

Hi all,

On Tue, 25 Jan 2022 13:55:46 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> After merging the kspp tree, today's linux-next build (powerpc
> allyesconfig) failed like this:
> 
> drivers/gpu/drm/kmb/kmb_plane.c: In function 'kmb_plane_atomic_disable':
> drivers/gpu/drm/kmb/kmb_plane.c:165:34: error: array subscript 3 is above array bounds of 'struct layer_status[2]' [-Werror=array-bounds]
>   165 |                 kmb->plane_status[plane_id].ctrl = LCD_CTRL_GL2_ENABLE;
>       |                 ~~~~~~~~~~~~~~~~~^~~~~~~~~~
> In file included from drivers/gpu/drm/kmb/kmb_plane.c:17:
> drivers/gpu/drm/kmb/kmb_drv.h:61:41: note: while referencing 'plane_status'
>    61 |         struct layer_status             plane_status[KMB_MAX_PLANES];
>       |                                         ^~~~~~~~~~~~
> drivers/gpu/drm/kmb/kmb_plane.c:162:34: error: array subscript 2 is above array bounds of 'struct layer_status[2]' [-Werror=array-bounds]
>   162 |                 kmb->plane_status[plane_id].ctrl = LCD_CTRL_GL1_ENABLE;
>       |                 ~~~~~~~~~~~~~~~~~^~~~~~~~~~
> In file included from drivers/gpu/drm/kmb/kmb_plane.c:17:
> drivers/gpu/drm/kmb/kmb_drv.h:61:41: note: while referencing 'plane_status'
>    61 |         struct layer_status             plane_status[KMB_MAX_PLANES];
>       |                                         ^~~~~~~~~~~~
> 
> Exposed by commit
> 
>   4ba545781e20 ("Makefile: Enable -Warray-bounds")
> 
> Originally introduced by commmit
> 
>   7f7b96a8a0a1 ("drm/kmb: Add support for KeemBay Display")
> 
> Maybe should have been fixed by
> 
>   c026565fe9be ("drm/kmb: Enable alpha blended second plane")
> 
> I have applied the following hack for now.

Actually, this one:

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Tue, 25 Jan 2022 13:45:26 +1100
Subject: [PATCH] hack for building with -Warray-bounds

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 drivers/gpu/drm/kmb/kmb_plane.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/kmb/kmb_plane.c b/drivers/gpu/drm/kmb/kmb_plane.c
index 00404ba4126d..b54197920712 100644
--- a/drivers/gpu/drm/kmb/kmb_plane.c
+++ b/drivers/gpu/drm/kmb/kmb_plane.c
@@ -158,12 +158,14 @@ static void kmb_plane_atomic_disable(struct drm_plane *plane,
 	case LAYER_1:
 		kmb->plane_status[plane_id].ctrl = LCD_CTRL_VL2_ENABLE;
 		break;
+#if 0
 	case LAYER_2:
 		kmb->plane_status[plane_id].ctrl = LCD_CTRL_GL1_ENABLE;
 		break;
 	case LAYER_3:
 		kmb->plane_status[plane_id].ctrl = LCD_CTRL_GL2_ENABLE;
 		break;
+#endif
 	}
 
 	kmb->plane_status[plane_id].disable = true;
-- 
2.34.1

-- 
Cheers,
Stephen Rothwell

Content of type "application/pgp-signature" skipped