From 9338e2ed1faf342eed8771eabb6a0c96aec3ef1e Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Thu, 16 Apr 2020 12:19:30 +0800 Subject: [PATCH] media: davinci/vpbe: array underflow in vpbe_enum_outputs() [ Upstream commit b72845ee5577b227131b1fef23f9d9a296621d7b ] In vpbe_enum_outputs() we check if (temp_index >= cfg->num_outputs) but the problem is that "temp_index" can be negative. This patch changes the types to unsigned to address this array underflow bug. Fixes: 66715cdc3224 ("[media] davinci vpbe: VPBE display driver") Signed-off-by: Dan Carpenter Acked-by: "Lad, Prabhakar" Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin Signed-off-by: Yang Yingliang --- drivers/media/platform/davinci/vpbe.c | 2 +- include/media/davinci/vpbe.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/media/platform/davinci/vpbe.c b/drivers/media/platform/davinci/vpbe.c index df1ae6b5c854..e45e062f4442 100644 --- a/drivers/media/platform/davinci/vpbe.c +++ b/drivers/media/platform/davinci/vpbe.c @@ -126,7 +126,7 @@ static int vpbe_enum_outputs(struct vpbe_device *vpbe_dev, struct v4l2_output *output) { struct vpbe_config *cfg = vpbe_dev->cfg; - int temp_index = output->index; + unsigned int temp_index = output->index; if (temp_index >= cfg->num_outputs) return -EINVAL; diff --git a/include/media/davinci/vpbe.h b/include/media/davinci/vpbe.h index 79a566d7defd..180a05e91497 100644 --- a/include/media/davinci/vpbe.h +++ b/include/media/davinci/vpbe.h @@ -92,7 +92,7 @@ struct vpbe_config { struct encoder_config_info *ext_encoders; /* amplifier information goes here */ struct amp_config_info *amp; - int num_outputs; + unsigned int num_outputs; /* Order is venc outputs followed by LCD and then external encoders */ struct vpbe_output *outputs; }; -- GitLab