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drm/radeon: possible buffer overflow

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[ Upstream commit dd05484f99 ]

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

Fixes: 5cc4e5fc29 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Konstantin Meskhidze
2023-11-20 11:06:48 +01:00
committed by Greg Kroah-Hartman
parent a6d6769e2d
commit 7b063c93be
1 changed files with 4 additions and 3 deletions
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drivers/gpu/drm/radeon/evergreen.c
+4 -3
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@@ -4819,14 +4819,15 @@ restart_ih:
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);