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Message-Id: <20210510102010.078527836@linuxfoundation.org>
Date: Mon, 10 May 2021 12:19:12 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org,
Carsten Haitzler <carsten.haitzler@....com>,
Liviu Dudau <liviu.dudau@....com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 155/299] drm/komeda: Fix bit check to import to value of proper type
From: Carsten Haitzler <carsten.haitzler@....com>
[ Upstream commit be3e477effba636ad25dcd244db264c6cd5c1f36 ]
KASAN found this problem. find_first_bit() expects to look at a
pointer pointing to a long, but we look at a u32 - this is going to be
an issue with endianness but, KSAN already flags this as out-of-bounds
stack reads. This fixes it by just importing inot a local long.
Signed-off-by: Carsten Haitzler <carsten.haitzler@....com>
Acked-by: Liviu Dudau <liviu.dudau@....com>
Signed-off-by: Liviu Dudau <liviu.dudau@....com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201218150812.68195-1-carsten.haitzler@foss.arm.com
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
.../drm/arm/display/include/malidp_utils.h | 3 ---
.../drm/arm/display/komeda/komeda_pipeline.c | 16 +++++++++++-----
.../display/komeda/komeda_pipeline_state.c | 19 +++++++++++--------
3 files changed, 22 insertions(+), 16 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..49a1d7f3539c 100644
--- a/drivers/gpu/drm/arm/display/include/malidp_utils.h
+++ b/drivers/gpu/drm/arm/display/include/malidp_utils.h
@@ -13,9 +13,6 @@
#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_wait_cond(__cond, __tries, __min_range, __max_range) \
({ \
int num_tries = __tries; \
diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline.c
index 452e505a1fd3..79a6339840bb 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) {
+ for_each_set_bit(i, &avail_comps, 32) {
c = komeda_pipeline_get_component(pipe, i);
komeda_component_destroy(mdev, c);
}
@@ -246,6 +247,7 @@ 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,
@@ -257,7 +259,7 @@ 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) {
+ for_each_set_bit(id, &avail_comps, 32) {
c = komeda_pipeline_get_component(pipe, id);
komeda_component_dump(c);
@@ -269,8 +271,9 @@ 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) {
+ for_each_set_bit(id, &supported_inputs, 32) {
input = komeda_pipeline_get_component(pipe, id);
if (!input) {
c->supported_inputs &= ~(BIT(id));
@@ -301,8 +304,9 @@ 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) {
+ for_each_set_bit(id, &avail_comps, 32) {
c = komeda_pipeline_get_component(pipe, id);
komeda_component_verify_inputs(c);
}
@@ -354,13 +358,15 @@ 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;
+ for_each_set_bit(id, &avail_comps, 32) {
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 8f32ae7c25d0..c3cdf283ecef 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_pipeline_state.c
@@ -1231,14 +1231,15 @@ 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);
disabling_comps = (~new->active_comps) & old->active_comps;
/* unbound all disabling component */
- dp_for_each_set_bit(id, disabling_comps) {
+ for_each_set_bit(id, &disabling_comps, 32) {
c = komeda_pipeline_get_component(pipe, id);
c_st = komeda_component_get_state_and_set_user(c,
drm_st, NULL, new->crtc);
@@ -1286,7 +1287,8 @@ 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);
@@ -1296,10 +1298,10 @@ 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) {
+ for_each_set_bit(id, &disabling_comps, 32) {
c = komeda_pipeline_get_component(pipe, id);
c_st = priv_to_comp_st(c->obj.state);
@@ -1330,16 +1332,17 @@ 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) {
+ for_each_set_bit(id, &changed_comps, 32) {
c = komeda_pipeline_get_component(pipe, id);
if (new->active_comps & BIT(c->id))
--
2.30.2
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