From dd05484f99d16715a88eedfca363828ef9a4c2d4 Mon Sep 17 00:00:00 2001
From: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Date: Thu, 17 Aug 2023 19:33:49 +0800
Subject: [PATCH] drm/radeon: possible buffer overflow
Git-commit: dd05484f99d16715a88eedfca363828ef9a4c2d4
Patch-mainline: v6.7-rc1
References: git-fixes
Buffer 'afmt_status' of size 6 could overflow, since index 'afmt_idx' is
checked after access.
Fixes: 5cc4e5fc293b ("drm/radeon: Cleanup HDMI audio interrupt handling for evergreen")
Co-developed-by: Ivanov Mikhail <ivanov.mikhail1@huawei-partners.com>
Signed-off-by: Konstantin Meskhidze <konstantin.meskhidze@huawei.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/radeon/evergreen.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 4f06356d9ce2..f0ae087be914 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -4821,14 +4821,15 @@ 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);
--
2.35.3