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Reject BPF programs with jump targets outside of range of instructions. #432

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merged 1 commit into from Apr 22, 2024
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Reject BPF programs with jump targets outside of range of instructions. #432

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2 changes: 1 addition & 1 deletion vm/ubpf_vm.c
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Expand Up @@ -1118,7 +1118,7 @@ validate(const struct ubpf_vm* vm, const struct ebpf_inst* insts, uint32_t num_i
}
} else if (inst.src == 1) {
int call_target = i + (inst.imm + 1);
if (call_target < 0 || call_target > num_insts) {
if (call_target < 0 || call_target >= num_insts) {
*errmsg =
ubpf_error("call to local function (at PC %d) is out of bounds (target: %d)", i, call_target);
return false;
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