diff options
| author | Maciej Purski <m.purski@samsung.com> | 2017-11-22 10:08:38 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-24 13:06:38 +0200 |
| commit | 519114dff49bba79efdeeed651bf81e92c336214 (patch) | |
| tree | f5eb4224fb58b7963fc66a1facdcd7598c33f71e | |
| parent | a5a1d971734d11a85353b352fa04814afa4dcd8d (diff) | |
drm/bridge/sii8620: fix potential buffer overflow
[ Upstream commit 9378cecb1ce5d618b8aff4d65113ddcf72fc1011 ]
Buffer overflow error should not occur, as mode_fixup() callback
filters pixel clock value and it should never exceed 600000. However,
current implementation is not obviously safe and relies on
implementation of mode_fixup().
Make 'i' variable never reach unsafe value in order to avoid buffer
overflow error.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: bf1722ca ("drm/bridge/sii8620: rewrite hdmi start sequence")
Signed-off-by: Maciej Purski <m.purski@samsung.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1511341718-6974-1-git-send-email-m.purski@samsung.com
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/gpu/drm/bridge/sil-sii8620.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c index e241631f7bfd..ed6a6e5b5f32 100644 --- a/drivers/gpu/drm/bridge/sil-sii8620.c +++ b/drivers/gpu/drm/bridge/sil-sii8620.c @@ -1228,7 +1228,7 @@ static void sii8620_start_video(struct sii8620 *ctx) int clk = ctx->pixel_clock * (ctx->use_packed_pixel ? 2 : 3); int i; - for (i = 0; i < ARRAY_SIZE(clk_spec); ++i) + for (i = 0; i < ARRAY_SIZE(clk_spec) - 1; ++i) if (clk < clk_spec[i].max_clk) break; |