return log_oom();
if (keep_capabilities) {
- cap_value_t bits[log2u64(keep_capabilities)];
+ cap_value_t bits[u64log2(keep_capabilities) + 1];
for (i = 0; i < ELEMENTSOF(bits); i++)
if (keep_capabilities & (1ULL << i))
bits[j++] = i;
- assert((keep_capabilities & (~1ULL << i)) == 0);
+
+ /* use enough bits */
+ assert(i == 64 || (keep_capabilities >> i) == 0);
+ /* don't use too many bits */
+ assert(keep_capabilities & (1ULL << (i - 1)));
if (cap_set_flag(d, CAP_EFFECTIVE, j, bits, CAP_SET) < 0 ||
cap_set_flag(d, CAP_PERMITTED, j, bits, CAP_SET) < 0) {