This patch fixes a potential integer overflow in the zynqmp_dp_rate_get()
The issue comes up when the expression drm_dp_bw_code_to_link_rate(dp->test.bw_code) * 10000 is evaluated using 32-bit Now the constant is a compatible 64-bit type.
Resolves coverity issues: CID 1636340 and CID 1635811
Signed-off-by: Karol Przybylski karprzy7@gmail.com Fixes: 28edaacb821c6 ("drm: zynqmp_dp: Add debugfs interface for compliance testing") --- drivers/gpu/drm/xlnx/zynqmp_dp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c index 25c5dc61e..56a261a40 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dp.c +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c @@ -2190,7 +2190,7 @@ static int zynqmp_dp_rate_get(void *data, u64 *val) struct zynqmp_dp *dp = data;
mutex_lock(&dp->lock); - *val = drm_dp_bw_code_to_link_rate(dp->test.bw_code) * 10000; + *val = drm_dp_bw_code_to_link_rate(dp->test.bw_code) * 10000ULL; mutex_unlock(&dp->lock); return 0; }