This is a note to let you know that I've just added the patch titled
drm/radeon: fix copy of uninitialized variable back to userspace
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-radeon-fix-copy-of-uninitialized-variable-back-to-userspace.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8dbc2ccac5a65c5b57e3070e36a3dc97c7970d96 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Date: Wed, 3 Mar 2021 00:27:59 +0000
Subject: drm/radeon: fix copy of uninitialized variable back to userspace
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
commit 8dbc2ccac5a65c5b57e3070e36a3dc97c7970d96 upstream.
Currently the ioctl command RADEON_INFO_SI_BACKEND_ENABLED_MASK can
copy back uninitialised data in value_tmp that pointer *value points
to. This can occur when rdev->family is less than CHIP_BONAIRE and
less than CHIP_TAHITI. Fix this by adding in a missing -EINVAL
so that no invalid value is copied back to userspace.
Addresses-Coverity: ("Uninitialized scalar variable)
Cc: stable@xxxxxxxxxxxxxxx # 3.13+
Fixes: 439a1cfffe2c ("drm/radeon: expose render backend mask to the userspace")
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_kms.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/gpu/drm/radeon/radeon_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_kms.c
@@ -506,6 +506,7 @@ static int radeon_info_ioctl(struct drm_
*value = rdev->config.si.backend_enable_mask;
} else {
DRM_DEBUG_KMS("BACKEND_ENABLED_MASK is si+ only!\n");
+ return -EINVAL;
}
break;
case RADEON_INFO_MAX_SCLK:
Patches currently in stable-queue which might be from colin.king@xxxxxxxxxxxxx are
queue-4.9/clk-socfpga-arria10-fix-memory-leak-of-socfpga_clk-o.patch
queue-4.9/drm-radeon-fix-copy-of-uninitialized-variable-back-to-userspace.patch
