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[(116.128.244.169)] by mailgw (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1552670189; Thu, 02 Nov 2023 18:16:55 +0800 From: chentao To: jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, tvrtko.ursulin@linux.intel.com, airlied@gmail.com, daniel@ffwll.ch, andi.shyti@linux.intel.com, robdclark@chromium.org, jonathan.cavitt@intel.com, andrzej.hajda@intel.com, chris.p.wilson@intel.com, alan.previn.teres.alexis@intel.com Cc: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kunwu.chan@hotmail.com, chentao Subject: [PATCH] drm/i915: Fix potential spectre vulnerability Date: Thu, 2 Nov 2023 18:16:42 +0800 Message-Id: <20231102101642.52988-1-chentao@kylinos.cn> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-0.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE, UNPARSEABLE_RELAY autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (lipwig.vger.email [0.0.0.0]); Thu, 02 Nov 2023 03:17:31 -0700 (PDT) Fix smatch warning: drivers/gpu/drm/i915/gem/i915_gem_context.c:847 set_proto_ctx_sseu() warn: potential spectre issue 'pc->user_engines' [r] (local cap) Signed-off-by: chentao --- drivers/gpu/drm/i915/gem/i915_gem_context.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c index 9a9ff84c90d7..b2fdfc7ca4de 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_context.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c @@ -843,7 +843,7 @@ static int set_proto_ctx_sseu(struct drm_i915_file_private *fpriv, if (idx >= pc->num_user_engines) return -EINVAL; - + idx = array_index_nospec(idx, pc->num_user_engines); pe = &pc->user_engines[idx]; /* Only render engine supports RPCS configuration. */ -- 2.34.1