This is a note to let you know that I've just added the patch titled
drm/bridge: anx7625: Fix overflow issue on reading EDID
to the 5.17-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-bridge-anx7625-fix-overflow-issue-on-reading-edi.patch
and it can be found in the queue-5.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f64de47b072ee464464dde3ad66c3cdfe2460879
Author: Pin-Yen Lin <treapking@xxxxxxxxxxxx>
Date: Thu Feb 10 18:38:27 2022 +0800
drm/bridge: anx7625: Fix overflow issue on reading EDID
[ Upstream commit d5c6f647aec9ed524aedd04a3aec5ebc21d39007 ]
The length of EDID block can be longer than 256 bytes, so we should use
`int` instead of `u8` for the `edid_pos` variable.
Fixes: 8bdfc5dae4e3 ("drm/bridge: anx7625: Add anx7625 MIPI DSI/DPI to DP")
Signed-off-by: Pin-Yen Lin <treapking@xxxxxxxxxxxx>
Reviewed-by: Jernej Skrabec <jernej.skrabec@xxxxxxxxx>
Signed-off-by: Robert Foss <robert.foss@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20220210103827.402436-1-treapking@xxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 2346dbcc505f..e596cacce9e3 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -846,7 +846,8 @@ static int segments_edid_read(struct anx7625_data *ctx,
static int sp_tx_edid_read(struct anx7625_data *ctx,
u8 *pedid_blocks_buf)
{
- u8 offset, edid_pos;
+ u8 offset;
+ int edid_pos;
int count, blocks_num;
u8 pblock_buf[MAX_DPCD_BUFFER_SIZE];
u8 i, j;
