[msan] Fix second parameter in MsanReallocate from previous commit.

It's wrong to pass to MsanReallocate a pointer that MSan allocator doesn't own.
Use nullptr instead of ptr to prevent possible (still unlikely) failure.

llvm-svn: 282390

1 files changed, 1 insertions, 1 deletions

diff --git a/compiler-rt/lib/msan/msan_interceptors.cc b/compiler-rt/lib/msan/msan_interceptors.cc
index 93b93aec283..53f10ab8e54 100644
--- a/compiler-rt/lib/msan/msan_interceptors.cc
+++ b/compiler-rt/lib/msan/msan_interceptors.cc
@@ -940,7 +940,7 @@ INTERCEPTOR(void *, realloc, void *ptr, SIZE_T size) {
       new_ptr = AllocateFromLocalPool(copy_size);
     } else {
       copy_size = size;
-      new_ptr = MsanReallocate(&stack, ptr, copy_size, sizeof(u64), false);
+      new_ptr = MsanReallocate(&stack, nullptr, copy_size, sizeof(u64), false);
     }
     internal_memcpy(new_ptr, ptr, copy_size);
     return new_ptr;