[PATCH] D42884: Prevent recursive MSan interceptors in fgets(3)

[Kamil Rytarowski via Phabricator via llvm-commits]

krytarowski created this revision.
krytarowski added reviewers: joerg, eugenis, vitalybuka.
krytarowski added a project: Sanitizers.

This corrects intercepting this call on NetBSD without false positives.

Sponsored by <The NetBSD Foundation>


Repository:
  rL LLVM

https://reviews.llvm.org/D42884

Files:
  lib/msan/msan_interceptors.cc


Index: lib/msan/msan_interceptors.cc
===================================================================
--- lib/msan/msan_interceptors.cc
+++ lib/msan/msan_interceptors.cc
@@ -779,6 +779,7 @@
 
 INTERCEPTOR(char *, fgets, char *s, int size, void *stream) {
   ENSURE_MSAN_INITED();
+  InterceptorScope interceptor_scope;
   char *res = REAL(fgets)(s, size, stream);
   if (res)
     __msan_unpoison(s, REAL(strlen)(s) + 1);


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