From patchwork Mon Sep 27 11:36:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 12519593 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0AA4BC433EF for ; Mon, 27 Sep 2021 11:36:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D2EC160F6B for ; Mon, 27 Sep 2021 11:36:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234097AbhI0LiP (ORCPT ); Mon, 27 Sep 2021 07:38:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:43108 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234075AbhI0LiP (ORCPT ); Mon, 27 Sep 2021 07:38:15 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id ED57060F58; Mon, 27 Sep 2021 11:36:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1632742597; bh=Rl3OTC7V1DvxO5S+CLcKb/G4xypiFLCG7rhJzIouM9o=; h=From:To:Cc:Subject:Date:From; b=GIRQdOlWtQeOMLb+VYfzHERHrDKA38VhnFhqfoB27L2ZztW1kG/YwfGnx8+bG5m2w tIDcTjzg8OBfBy9I1T9duPEeXgoEHSjzRE69zF4UJ7AN7s9NWuE0m658Wci7xL0xai ea0aXKeWWRmrVH1JbjRfizMoUuLHo3hr8X0TrZixmNsPDHbeeIng78GbIcOuvMrqu8 SE4vg9tVwLTVvaJB9O6sjiGoXNzhsd0WjChOtXE+Iu3PjfXtqu4Gt2Iej5V8WYyQ4x +/9bhZDBAYhH7wIdixdaYvEL5yVXxdw563oV7wHam7QvEezxKicYyfyS58W33vgEEx LNh6HRkSCn50A== From: Arnd Bergmann To: Rob Clark , Sean Paul , David Airlie , Daniel Vetter , Nathan Chancellor , Nick Desaulniers , "Kristian H. Kristensen" Cc: Arnd Bergmann , =?utf-8?q?Christian_K=C3=B6nig?= , Jordan Crouse , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev Subject: [PATCH] drm/msm/submit: fix overflow check on 64-bit architectures Date: Mon, 27 Sep 2021 13:36:23 +0200 Message-Id: <20210927113632.3849987-1-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Arnd Bergmann The overflow check does causes a warning from clang-14 when 'sz' is a type that is smaller than size_t: drivers/gpu/drm/msm/msm_gem_submit.c:217:10: error: result of comparison of constant 18446744073709551615 with expression of type 'unsigned int' is always false [-Werror,-Wtautological-constant-out-of-range-compare] if (sz == SIZE_MAX) { Change the type accordingly. Fixes: 20224d715a88 ("drm/msm/submit: Move copy_from_user ahead of locking bos") Signed-off-by: Arnd Bergmann Reviewed-by: Stephen Boyd --- drivers/gpu/drm/msm/msm_gem_submit.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/msm_gem_submit.c b/drivers/gpu/drm/msm/msm_gem_submit.c index fdc5367aecaa..ac23bbdb0bab 100644 --- a/drivers/gpu/drm/msm/msm_gem_submit.c +++ b/drivers/gpu/drm/msm/msm_gem_submit.c @@ -171,7 +171,8 @@ static int submit_lookup_objects(struct msm_gem_submit *submit, static int submit_lookup_cmds(struct msm_gem_submit *submit, struct drm_msm_gem_submit *args, struct drm_file *file) { - unsigned i, sz; + unsigned i; + size_t sz; int ret = 0; for (i = 0; i < args->nr_cmds; i++) {