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| author | Pin-Yen Lin <treapking@chromium.org> | 2022-02-10 13:38:27 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 15:23:31 +0300 |
| commit | 64c06df2428bb7bb3d8cf5691416001af42d94dd (patch) | |
| tree | 6f14f4dc92a686257f2eb1fde2bbf86204ddfe3b | |
| parent | d6c7f46b8f05b0b7f8a6e3ecbbcb1a917663a85e (diff) | |
| download | linux-64c06df2428bb7bb3d8cf5691416001af42d94dd.tar.xz | |
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@chromium.org>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220210103827.402436-1-treapking@chromium.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/gpu/drm/bridge/analogix/anx7625.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c index ea414cd349b5..392a9c56e9a0 100644 --- a/drivers/gpu/drm/bridge/analogix/anx7625.c +++ b/drivers/gpu/drm/bridge/analogix/anx7625.c @@ -791,7 +791,8 @@ 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; |