From 6ce9efd12ae81cf46bf44eb0348594558dfbb9d2 Mon Sep 17 00:00:00 2001
From: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Date: Thu, 11 Jul 2024 14:53:30 +0100
Subject: [PATCH] drm/v3d: Prevent out of bounds access in performance query
extensions
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Check that the number of perfmons userspace is passing in the copy and
reset extensions is not greater than the internal kernel storage where
the ids will be copied into.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Fixes: bae7cb5d6800 ("drm/v3d: Create a CPU job extension for the reset performance query job")
Cc: MaÃra Canal <mcanal@igalia.com>
Cc: Iago Toral Quiroga <itoral@igalia.com>
Cc: stable@vger.kernel.org # v6.8+
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: MaÃra Canal <mcanal@igalia.com>
Signed-off-by: MaÃra Canal <mcanal@igalia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240711135340.84617-2-tursulin@igalia.com
(cherry picked from commit f32b5128d2c440368b5bf3a7a356823e235caabb)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/v3d/v3d_submit.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/gpu/drm/v3d/v3d_submit.c b/drivers/gpu/drm/v3d/v3d_submit.c
index 88f63d526b22..263fefc1d04f 100644
--- a/drivers/gpu/drm/v3d/v3d_submit.c
+++ b/drivers/gpu/drm/v3d/v3d_submit.c
@@ -637,6 +637,9 @@ v3d_get_cpu_reset_performance_params(struct drm_file *file_priv,
if (copy_from_user(&reset, ext, sizeof(reset)))
return -EFAULT;
+ if (reset.nperfmons > V3D_MAX_PERFMONS)
+ return -EINVAL;
+
job->job_type = V3D_CPU_JOB_TYPE_RESET_PERFORMANCE_QUERY;
job->performance_query.queries = kvmalloc_array(reset.count,
@@ -708,6 +711,9 @@ v3d_get_cpu_copy_performance_query_params(struct drm_file *file_priv,
if (copy.pad)
return -EINVAL;
+ if (copy.nperfmons > V3D_MAX_PERFMONS)
+ return -EINVAL;
+
job->job_type = V3D_CPU_JOB_TYPE_COPY_PERFORMANCE_QUERY;
job->performance_query.queries = kvmalloc_array(copy.count,
--
2.30.9