Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <31187f41-64c8-d7ce-fcf2-5da421b3e194@igalia.com>
Date:   Mon, 1 Aug 2022 14:06:41 -0300
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101
 Thunderbird/91.11.0
Subject: Re: [PATCHv2 -next] drm/amdgpu: double free error and freeing
 uninitialized null pointer
Content-Language: en-US
To:     Sebin Sebastian <mailmesebin00@gmail.com>
Cc:     Alex Deucher <alexander.deucher@amd.com>,
        =?UTF-8?Q?Christian_K=c3=b6nig?= <christian.koenig@amd.com>,
        "Pan, Xinhui" <Xinhui.Pan@amd.com>,
        David Airlie <airlied@linux.ie>,
        Daniel Vetter <daniel@ffwll.ch>,
        Nirmoy Das <nirmoy.das@amd.com>,
        Lijo Lazar <lijo.lazar@amd.com>, Evan Quan <evan.quan@amd.com>,
        Tom St Denis <tom.stdenis@amd.com>,
        Somalapuram Amaranath <Amaranath.Somalapuram@amd.com>,
        amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
        linux-kernel@vger.kernel.org
References: <20220730034923.25500-1-mailmesebin00@gmail.com>
From:   =?UTF-8?Q?Andr=c3=a9_Almeida?= <andrealmeid@igalia.com>
In-Reply-To: <20220730034923.25500-1-mailmesebin00@gmail.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk

Às 00:46 de 30/07/22, Sebin Sebastian escreveu:
> Fix a double free and an uninitialized pointer read error. Both tmp and
> new are pointing at same address and both are freed which leads to
> double free. Adding a check to verify if new and tmp are free in the
> error_free label fixes the double free issue. new is not initialized to
> null which also leads to a free on an uninitialized pointer.
> 
> Suggested by: S. Amaranath <Amaranath.Somalapuram@amd.com>
> Signed-off-by: Sebin Sebastian <mailmesebin00@gmail.com>

Reviewed-by: André Almeida <andrealmeid@igalia.com>