linux-kernel - Re: [PATCH] drm/msm/dpu: Fix uninitialized variable

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 for Android: free password hash cracker in your pocket

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

Message-ID: <o7yqskbm6px5t2klbiid7dklogrchyn4we2radaoznopupczxw@imywm2ngpoc5>
Date: Mon, 10 Feb 2025 05:41:10 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Ethan Carter Edwards <ethan@...ancedwards.com>
Cc: Abhinav Kumar <quic_abhinavk@...cinc.com>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, Simona Vetter <simona@...ll.ch>, linux-arm-msm@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/msm/dpu: Fix uninitialized variable

On Sun, Feb 09, 2025 at 10:32:33PM -0500, Ethan Carter Edwards wrote:
> There is a possibility for an uninitialized *ret* variable to be
> returned in some code paths.
> 
> Fix this by initializing *ret* to 0.
> 
> Addresses-Coverity-ID: 1642546 ("Uninitialized scalar variable")
> Fixes: 774bcfb731765d ("drm/msm/dpu: add support for virtual planes")
> Signed-off-by: Ethan Carter Edwards <ethan@...ancedwards.com>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> index 098abc2c0003cde90ce6219c97ee18fa055a92a5..74edaa9ecee72111b70f32b832486aeebe545a28 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
> @@ -1164,7 +1164,7 @@ int dpu_assign_plane_resources(struct dpu_global_state *global_state,
>  			       unsigned int num_planes)
>  {
>  	unsigned int i;
> -	int ret;
> +	int ret = 0;

Thanks, but I think it better to make the function return ret from
within the loop and return explicit 0 if there was no error.

>  
>  	for (i = 0; i < num_planes; i++) {
>  		struct drm_plane_state *plane_state = states[i];
> 
> ---
> base-commit: a64dcfb451e254085a7daee5fe51bf22959d52d3
> change-id: 20250209-dpu-c3fac78fc617
> 
> Best regards,
> -- 
> Ethan Carter Edwards <ethan@...ancedwards.com>
> 

-- 
With best wishes
Dmitry