diff mbox

drm/bridge/sii8620: fix potential buffer overflow

Message ID 1511341718-6974-1-git-send-email-m.purski@samsung.com (mailing list archive)
State New, archived
Headers show

Commit Message

Maciej Purski Nov. 22, 2017, 9:08 a.m. UTC 
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>
---
 drivers/gpu/drm/bridge/sil-sii8620.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c
index d58db13..25ae0e5 100644
--- a/drivers/gpu/drm/bridge/sil-sii8620.c
+++ b/drivers/gpu/drm/bridge/sil-sii8620.c
@@ -1210,7 +1210,7 @@  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;