From: Dmitry Vyukov <dvyukov@google.com>
Date: Mon, 20 Feb 2023 10:58:15 +0000 (+0100)
Subject: asan: fix crash in strdup on malloc failure
X-Git-Tag: upstream/17.0.6~16970
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=99c7664bd4be4a2e719415a18ca80fcf9a619a5e;p=platform%2Fupstream%2Fllvm.git

asan: fix crash in strdup on malloc failure

There are some programs that try to handle all malloc failures.
Let's allow testing of such programs.

Reviewed By: melver

Differential Revision: https://reviews.llvm.org/D144374
---

diff --git a/compiler-rt/lib/asan/asan_interceptors.cpp b/compiler-rt/lib/asan/asan_interceptors.cpp
index 8170082..a4084c8 100644
--- a/compiler-rt/lib/asan/asan_interceptors.cpp
+++ b/compiler-rt/lib/asan/asan_interceptors.cpp
@@ -453,7 +453,9 @@ INTERCEPTOR(char*, strdup, const char *s) {
   }
   GET_STACK_TRACE_MALLOC;
   void *new_mem = asan_malloc(length + 1, &stack);
-  REAL(memcpy)(new_mem, s, length + 1);
+  if (new_mem) {
+    REAL(memcpy)(new_mem, s, length + 1);
+  }
   return reinterpret_cast<char*>(new_mem);
 }
 
@@ -469,7 +471,9 @@ INTERCEPTOR(char*, __strdup, const char *s) {
   }
   GET_STACK_TRACE_MALLOC;
   void *new_mem = asan_malloc(length + 1, &stack);
-  REAL(memcpy)(new_mem, s, length + 1);
+  if (new_mem) {
+    REAL(memcpy)(new_mem, s, length + 1);
+  }
   return reinterpret_cast<char*>(new_mem);
 }
 #endif // ASAN_INTERCEPT___STRDUP