5.4-stable review patch. If anyone has any objections, please let me know.
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From: Ricardo Ribalda ribalda@chromium.org
[ 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 hverkuil@xs4all.nl Closes: https://lore.kernel.org/linux-media/f11653a7-bc49-48cd-9cdb-1659147453e4@xs4... Fixes: 7472c1c69138 ("[media] media: venus: vdec: add video decoder files") Cc: stable@vger.kernel.org Tested-by: Bryan O'Donoghue bryan.odonoghue@linaro.org # qrb5615-rb5 Reviewed-by: Bryan O'Donoghue bryan.odonoghue@linaro.org Signed-off-by: Ricardo Ribalda ribalda@chromium.org [bod: Change "parm" to "param"] Signed-off-by: Bryan O'Donoghue bod@kernel.org Signed-off-by: Hans Verkuil hverkuil@xs4all.nl [ Adjust context in header ] Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/media/platform/qcom/venus/core.h | 2 ++ drivers/media/platform/qcom/venus/vdec.c | 5 ++--- 2 files changed, 4 insertions(+), 3 deletions(-)
--- 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; --- 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 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;