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 4.4-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-4.4 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 @@ -503,6 +503,7 @@ 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-4.4/clk-socfpga-arria10-fix-memory-leak-of-socfpga_clk-o.patch queue-4.4/drm-radeon-fix-copy-of-uninitialized-variable-back-to-userspace.patch