From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DAF1B7469 for ; Sun, 17 Sep 2023 20:23:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48434C433C8; Sun, 17 Sep 2023 20:23:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1694982205; bh=ct5uwVRjzT+FZi9/I/bMLW/7bfnUbEyG+vHhK9jXKvA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VADgn+c0cA3SOsoxGUvg72qtOQeLXBT8P5dsGFVrvqAjxkI+4kkKNP2p9G+00AAUm DTc/lpyVGF+ezflDt7RwdKhiUOfyyhzIxQUTYY7Nzgnt8cXg/jzLdrroqeGnih4N2U xcZh2AoEVCmb5uB939SGg9Es3g9haF2w6v2c40rI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Matthias Brugger , Alexandre Mergnat , Sui Jingfeng , CK Hu , AngeloGioacchino Del Regno , Chun-Kuang Hu , Sasha Levin Subject: [PATCH 5.15 182/511] drm/mediatek: Fix potential memory leak if vmap() fail Date: Sun, 17 Sep 2023 21:10:09 +0200 Message-ID: <20230917191118.225215314@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230917191113.831992765@linuxfoundation.org> References: <20230917191113.831992765@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sui Jingfeng [ Upstream commit 379091e0f6d179d1a084c65de90fa44583b14a70 ] Also return -ENOMEM if such a failure happens, the implement should take responsibility for the error handling. Fixes: 3df64d7b0a4f ("drm/mediatek: Implement gem prime vmap/vunmap function") Reviewed-by: Matthias Brugger Reviewed-by: Alexandre Mergnat Signed-off-by: Sui Jingfeng Reviewed-by: CK Hu Reviewed-by: AngeloGioacchino Del Regno Link: https://patchwork.kernel.org/project/dri-devel/patch/20230706134000.130098-1-suijingfeng@loongson.cn/ Signed-off-by: Chun-Kuang Hu Signed-off-by: Sasha Levin --- drivers/gpu/drm/mediatek/mtk_drm_gem.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.c b/drivers/gpu/drm/mediatek/mtk_drm_gem.c index 726a34c4725c4..b983adffa3929 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_gem.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.c @@ -242,7 +242,11 @@ int mtk_drm_gem_prime_vmap(struct drm_gem_object *obj, struct dma_buf_map *map) mtk_gem->kvaddr = vmap(mtk_gem->pages, npages, VM_MAP, pgprot_writecombine(PAGE_KERNEL)); - + if (!mtk_gem->kvaddr) { + kfree(sgt); + kfree(mtk_gem->pages); + return -ENOMEM; + } out: kfree(sgt); dma_buf_map_set_vaddr(map, mtk_gem->kvaddr); -- 2.40.1