linux-kernel - [PATCH 5.4 10/64] drm/etnaviv: relax submit size limits

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Message-Id: <20220131105216.005198204@linuxfoundation.org>
Date:   Mon, 31 Jan 2022 11:55:55 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Lucas Stach <l.stach@...gutronix.de>,
        Christian Gmeiner <christian.gmeiner@...il.com>
Subject: [PATCH 5.4 10/64] drm/etnaviv: relax submit size limits

From: Lucas Stach <l.stach@...gutronix.de>

commit e3d26528e083e612314d4dcd713f3d5a26143ddc upstream.

While all userspace tried to limit commandstreams to 64K in size,
a bug in the Mesa driver lead to command streams of up to 128K
being submitted. Allow those to avoid breaking existing userspace.

Fixes: 6dfa2fab8ddd ("drm/etnaviv: limit submit sizes")
Cc: stable@...r.kernel.org
Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
@@ -471,8 +471,8 @@ int etnaviv_ioctl_gem_submit(struct drm_
 		return -EINVAL;
 	}
 
-	if (args->stream_size > SZ_64K || args->nr_relocs > SZ_64K ||
-	    args->nr_bos > SZ_64K || args->nr_pmrs > 128) {
+	if (args->stream_size > SZ_128K || args->nr_relocs > SZ_128K ||
+	    args->nr_bos > SZ_128K || args->nr_pmrs > 128) {
 		DRM_ERROR("submit arguments out of size limits\n");
 		return -EINVAL;
 	}