[PATCH] D63877: Avoid infinite loop with asan interception

serge via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Thu Jun 27 06:43:07 PDT 2019


serge-sans-paille created this revision.
serge-sans-paille added a reviewer: kcc.
Herald added projects: Sanitizers, LLVM.
Herald added subscribers: llvm-commits, Sanitizers.

This should fix https://bugs.llvm.org/show_bug.cgi?id=39641


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D63877

Files:
  compiler-rt/lib/interception/interception_linux.cc


Index: compiler-rt/lib/interception/interception_linux.cc
===================================================================
--- compiler-rt/lib/interception/interception_linux.cc
+++ compiler-rt/lib/interception/interception_linux.cc
@@ -54,6 +54,9 @@
 bool InterceptFunction(const char *name, uptr *ptr_to_real, uptr func,
                        uptr wrapper) {
   void *addr = GetFuncAddr(name);
+  if ((uptr)addr == wrapper)
+    addr = nullptr;
+
   *ptr_to_real = (uptr)addr;
   return addr && (func == wrapper);
 }


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