From 6242f1a36109cc7f9d1236c228543e841fa83a6d Mon Sep 17 00:00:00 2001 From: Ricardo Ribalda Date: Sat, 23 Aug 2025 08:54:54 -0400 Subject: [PATCH] media: venus: vdec: Clamp param smaller than 1fps and bigger than 240. [ Upstream commit 377dc500d253f0b26732b2cb062e89668aef890a ] The driver uses "whole" fps in all its calculations (e.g. in load_per_instance()). Those calculation expect an fps bigger than 1, and not big enough to overflow. Clamp the value if the user provides a param that will result in an invalid fps. Reported-by: Hans Verkuil Closes: https://lore.kernel.org/linux-media/f11653a7-bc49-48cd-9cdb-1659147453e4@xs4all.nl/T/#m91cd962ac942834654f94c92206e2f85ff7d97f0 Fixes: 7472c1c69138 ("[media] media: venus: vdec: add video decoder files") Cc: stable@vger.kernel.org Tested-by: Bryan O'Donoghue # qrb5615-rb5 Reviewed-by: Bryan O'Donoghue Signed-off-by: Ricardo Ribalda [bod: Change "parm" to "param"] Signed-off-by: Bryan O'Donoghue Signed-off-by: Hans Verkuil [ Adjust context in header ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/media/platform/qcom/venus/core.h | 2 ++ drivers/media/platform/qcom/venus/vdec.c | 5 ++--- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h index 922cb7e64bfa..03512858c868 100644 --- a/drivers/media/platform/qcom/venus/core.h +++ b/drivers/media/platform/qcom/venus/core.h @@ -16,6 +16,8 @@ #define VIDC_CLKS_NUM_MAX 4 +#define VENUS_MAX_FPS 240 + struct freq_tbl { unsigned int load; unsigned long freq; diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c index a0a67b7132b8..551462e64082 100644 --- a/drivers/media/platform/qcom/venus/vdec.c +++ b/drivers/media/platform/qcom/venus/vdec.c @@ -418,11 +418,10 @@ static int vdec_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) us_per_frame = timeperframe->numerator * (u64)USEC_PER_SEC; do_div(us_per_frame, timeperframe->denominator); - if (!us_per_frame) - return -EINVAL; - + us_per_frame = clamp(us_per_frame, 1, USEC_PER_SEC); fps = (u64)USEC_PER_SEC; do_div(fps, us_per_frame); + fps = min(VENUS_MAX_FPS, fps); inst->fps = fps; inst->timeperframe = *timeperframe;