From d5b50055338e131a1a99f923ebb0361974a00f36 Mon Sep 17 00:00:00 2001 From: Hungyu Lin Date: Thu, 7 May 2026 02:22:13 +0000 Subject: [PATCH] media: tegra-video: vi: fix invalid u32 return value in format lookup tegra_get_format_fourcc_by_idx() returns a u32 but uses -EINVAL to signal an out-of-bounds index. This results in a large unsigned value being returned, which may be interpreted as a valid fourcc. Returning 0 is not a valid fourcc either. This condition should never happen, so use WARN_ON_ONCE() to catch unexpected out-of-bounds access and return a valid fallback format instead. Suggested-by: Hans Verkuil Fixes: 3d8a97eabef0 ("media: tegra-video: Add Tegra210 Video input driver") Cc: stable@vger.kernel.org Reviewed-by: Luca Ceresoli Signed-off-by: Hungyu Lin Signed-off-by: Hans Verkuil --- drivers/staging/media/tegra-video/vi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c index f14cdc7b5211..456134a9e8cf 100644 --- a/drivers/staging/media/tegra-video/vi.c +++ b/drivers/staging/media/tegra-video/vi.c @@ -80,8 +80,8 @@ static int tegra_get_format_idx_by_code(struct tegra_vi *vi, static u32 tegra_get_format_fourcc_by_idx(struct tegra_vi *vi, unsigned int index) { - if (index >= vi->soc->nformats) - return -EINVAL; + if (WARN_ON_ONCE(index >= vi->soc->nformats)) + return vi->soc->video_formats[0].fourcc; return vi->soc->video_formats[index].fourcc; }