Index: ELF/InputSection.cpp
===================================================================
--- ELF/InputSection.cpp
+++ ELF/InputSection.cpp
@@ -570,6 +570,10 @@
 // R_RISCV_PCREL_LO12's symbol and addend.
 static Relocation *getRISCVPCRelHi20(const Symbol *Sym, uint64_t Addend) {
   const Defined *D = cast<Defined>(Sym);
+  if (!D->Section) {
+    error("R_RISCV_PCREL_LO12 relocation points to an absolute symbol");
+    return nullptr;
+  }
   InputSection *IS = cast<InputSection>(D->Section);
 
   if (Addend != 0)
Index: test/ELF/riscv-pcrel-hilo-error.s
===================================================================
--- /dev/null
+++ test/ELF/riscv-pcrel-hilo-error.s
@@ -0,0 +1,7 @@
+# REQUIRES: riscv
+# RUN: llvm-mc -filetype=obj -triple=riscv64 %s -o %t.o
+# RUN: not ld.lld %t.o --defsym external=0 2>&1 | FileCheck %s
+
+# CHECK: error: R_RISCV_PCREL_LO12 relocation points to an absolute symbol
+
+addi sp,sp,%pcrel_lo(external)