Commit d7a31a26 authored by Konstantin Meskhidze's avatar Konstantin Meskhidze Committed by openeuler-sync-bot
Browse files

drm/radeon: possible buffer overflow 

stable inclusion
from stable-v5.10.205
commit 7b063c93bece827fde237fae1c101bceeee4e896
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8AS5P
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.10.205&id=7b063c93bece827fde237fae1c101bceeee4e896



-------------------------

[ Upstream commit dd05484f99d16715a88eedfca363828ef9a4c2d4 ]

Buffer 'afmt_status' of size 6 could overflow, since index 'afmt_idx' is
checked after access.

Fixes: 5cc4e5fc ("drm/radeon: Cleanup HDMI audio interrupt handling for evergreen")
Co-developed-by: default avatarIvanov Mikhail <ivanov.mikhail1@huawei-partners.com>
Signed-off-by: default avatarKonstantin Meskhidze <konstantin.meskhidze@huawei.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarBaogen Shang <baogen.shang@windriver.com>
(cherry picked from commit 23eb9c1f)
parent 31ca0b66

drivers/gpu/drm/radeon/evergreen.c

+4 −3
Original line number Diff line number Diff line
@@ -4819,14 +4819,15 @@ int evergreen_irq_process(struct radeon_device *rdev) 
			break;

		case 44: /* hdmi */

			afmt_idx = src_data;

			if (!(afmt_status[afmt_idx] & AFMT_AZ_FORMAT_WTRIG))

				DRM_DEBUG("IH: IH event w/o asserted irq bit?\n");



			if (afmt_idx > 5) {

				DRM_ERROR("Unhandled interrupt: %d %d\n",

					  src_id, src_data);

				break;

			}



			if (!(afmt_status[afmt_idx] & AFMT_AZ_FORMAT_WTRIG))

				DRM_DEBUG("IH: IH event w/o asserted irq bit?\n");



			afmt_status[afmt_idx] &= ~AFMT_AZ_FORMAT_WTRIG;

			queue_hdmi = true;

			DRM_DEBUG("IH: HDMI%d\n", afmt_idx + 1);