From patchwork Wed Jan 27 12:34:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Carsten Haitzler X-Patchwork-Id: 12049951 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51547C433DB for ; Wed, 27 Jan 2021 12:34:58 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B8DFC2072C for ; Wed, 27 Jan 2021 12:34:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B8DFC2072C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=foss.arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3148D89B96; Wed, 27 Jan 2021 12:34:57 +0000 (UTC) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by gabe.freedesktop.org (Postfix) with ESMTP id 48F2289B96 for ; Wed, 27 Jan 2021 12:34:55 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9A8CF1FB; Wed, 27 Jan 2021 04:34:54 -0800 (PST) Received: from cubie.arm.com (unknown [10.37.8.28]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E35103F68F; Wed, 27 Jan 2021 04:34:53 -0800 (PST) From: carsten.haitzler@foss.arm.com To: dri-devel@lists.freedesktop.org Subject: [PATCH] drm/komeda: Fix bit check to import to value of proper type Date: Wed, 27 Jan 2021 12:34:30 +0000 Message-Id: <20210127123430.301752-1-carsten.haitzler@foss.arm.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: liviu.dudau@arm.com, Carsten Haitzler Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Carsten Haitzler Another issue found by KASAN. The bit finding is buried inside the dp_for_each_set_bit() macro (that passes on to for_each_set_bit() that calls the bit stuff. These bit functions want an unsigned long pointer as input and just dumbly casting leads to out-of-bounds accesses. This fixes that. Signed-off-by: Carsten Haitzler --- .../gpu/drm/arm/display/include/malidp_utils.h | 10 ++++++++-- .../gpu/drm/arm/display/komeda/komeda_pipeline.c | 16 +++++++++++----- .../arm/display/komeda/komeda_pipeline_state.c | 13 ++++++++----- 3 files changed, 27 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/arm/display/include/malidp_utils.h b/drivers/gpu/drm/arm/display/include/malidp_utils.h index 3bc383d5bf73..8d289cd0b5b8 100644 --- a/drivers/gpu/drm/arm/display/include/malidp_utils.h +++ b/drivers/gpu/drm/arm/display/include/malidp_utils.h @@ -12,9 +12,15 @@ #define has_bit(nr, mask) (BIT(nr) & (mask)) #define has_bits(bits, mask) (((bits) & (mask)) == (bits)) - +/* +#define dp_for_each_set_bit(bit, mask) \ + for_each_set_bit((bit), (&((unsigned long)(mask))), sizeof(mask) * 8) +#define dp_for_each_set_bit(bit, mask) \ + unsigned long __local_mask = mask; \ + for_each_set_bit((bit), (&__local_mask), sizeof(mask) * 8) +*/ #define dp_for_each_set_bit(bit, mask) \ - for_each_set_bit((bit), ((unsigned long *)&(mask)), sizeof(mask) * 8) + for_each_set_bit((bit), &(mask), sizeof(mask) * 8) #define dp_wait_cond(__cond, __tries, __min_range, __max_range) \ ({ \ diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c index 719a79728e24..a85c8a806334 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c @@ -46,8 +46,9 @@ void komeda_pipeline_destroy(struct komeda_dev *mdev, { struct komeda_component *c; int i; + unsigned long avail_comps = pipe->avail_comps; - dp_for_each_set_bit(i, pipe->avail_comps) { + dp_for_each_set_bit(i, avail_comps) { c = komeda_pipeline_get_component(pipe, i); komeda_component_destroy(mdev, c); } @@ -247,6 +248,7 @@ static void komeda_pipeline_dump(struct komeda_pipeline *pipe) { struct komeda_component *c; int id; + unsigned long avail_comps = pipe->avail_comps; DRM_INFO("Pipeline-%d: n_layers: %d, n_scalers: %d, output: %s.\n", pipe->id, pipe->n_layers, pipe->n_scalers, @@ -258,7 +260,7 @@ static void komeda_pipeline_dump(struct komeda_pipeline *pipe) pipe->of_output_links[1] ? pipe->of_output_links[1]->full_name : "none"); - dp_for_each_set_bit(id, pipe->avail_comps) { + dp_for_each_set_bit(id, avail_comps) { c = komeda_pipeline_get_component(pipe, id); komeda_component_dump(c); @@ -270,8 +272,9 @@ static void komeda_component_verify_inputs(struct komeda_component *c) struct komeda_pipeline *pipe = c->pipeline; struct komeda_component *input; int id; + unsigned long supported_inputs = c->supported_inputs; - dp_for_each_set_bit(id, c->supported_inputs) { + dp_for_each_set_bit(id, supported_inputs) { input = komeda_pipeline_get_component(pipe, id); if (!input) { c->supported_inputs &= ~(BIT(id)); @@ -302,8 +305,9 @@ static void komeda_pipeline_assemble(struct komeda_pipeline *pipe) struct komeda_component *c; struct komeda_layer *layer; int i, id; + unsigned long avail_comps = pipe->avail_comps; - dp_for_each_set_bit(id, pipe->avail_comps) { + dp_for_each_set_bit(id, avail_comps) { c = komeda_pipeline_get_component(pipe, id); komeda_component_verify_inputs(c); } @@ -355,13 +359,15 @@ void komeda_pipeline_dump_register(struct komeda_pipeline *pipe, { struct komeda_component *c; u32 id; + unsigned long avail_comps; seq_printf(sf, "\n======== Pipeline-%d ==========\n", pipe->id); if (pipe->funcs && pipe->funcs->dump_register) pipe->funcs->dump_register(pipe, sf); - dp_for_each_set_bit(id, pipe->avail_comps) { + avail_comps = pipe->avail_comps; + dp_for_each_set_bit(id, avail_comps) { c = komeda_pipeline_get_component(pipe, id); seq_printf(sf, "\n------%s------\n", c->name); diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c index e8b1e15312d8..7640dae7f4bf 100644 --- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c +++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c @@ -1232,7 +1232,8 @@ komeda_pipeline_unbound_components(struct komeda_pipeline *pipe, struct komeda_pipeline_state *old = priv_to_pipe_st(pipe->obj.state); struct komeda_component_state *c_st; struct komeda_component *c; - u32 disabling_comps, id; + u32 id; + unsigned long disabling_comps; WARN_ON(!old); @@ -1287,7 +1288,8 @@ bool komeda_pipeline_disable(struct komeda_pipeline *pipe, struct komeda_pipeline_state *old; struct komeda_component *c; struct komeda_component_state *c_st; - u32 id, disabling_comps = 0; + u32 id; + unsigned long disabling_comps; old = komeda_pipeline_get_old_state(pipe, old_state); @@ -1297,7 +1299,7 @@ bool komeda_pipeline_disable(struct komeda_pipeline *pipe, disabling_comps = old->active_comps & pipe->standalone_disabled_comps; - DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, disabling_comps: 0x%x.\n", + DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, disabling_comps: 0x%lx.\n", pipe->id, old->active_comps, disabling_comps); dp_for_each_set_bit(id, disabling_comps) { @@ -1331,13 +1333,14 @@ void komeda_pipeline_update(struct komeda_pipeline *pipe, struct komeda_pipeline_state *new = priv_to_pipe_st(pipe->obj.state); struct komeda_pipeline_state *old; struct komeda_component *c; - u32 id, changed_comps = 0; + u32 id; + unsigned long changed_comps; old = komeda_pipeline_get_old_state(pipe, old_state); changed_comps = new->active_comps | old->active_comps; - DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, changed: 0x%x.\n", + DRM_DEBUG_ATOMIC("PIPE%d: active_comps: 0x%x, changed: 0x%lx.\n", pipe->id, new->active_comps, changed_comps); dp_for_each_set_bit(id, changed_comps) {