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In case of the target we want to find is less than all candidates, end = mid - 1U will finally execute with mid = 0, which makes end = 0xFF..FF. We'll have an invalid memory access in this case. Change u32 to int for start, mid and end variables in allowlist_offset_search. This case also applied for allowlist_range_search. Bug 3417343 Change-Id: I30fe90e9439d2ac8bba01c68a8c70b6f6466d68b Signed-off-by: Vincent Lu <canjiangl@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2617309 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com> Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: Rajesh Devaraj <rdevaraj@nvidia.com> Reviewed-by: Deepak Nibade <dnibade@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> GVS: Gerrit_Virtual_Submit Tested-by: Antony Clince Alex <aalex@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>