diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
@@ -9855,12 +9855,19 @@
     }
   }
   qsort_compar_f old_compar = qsort_compar;
-  qsort_compar = compar;
   SIZE_T old_size = qsort_size;
-  qsort_size = size;
+  // Handle qsort() implementations that recurse using an
+  // interposable function call:
+  bool already_wrapped = compar == wrapped_qsort_compar;
+  if (!already_wrapped) {
+    qsort_compar = compar;
+    qsort_size = size;
+  }
   REAL(qsort)(base, nmemb, size, wrapped_qsort_compar);
-  qsort_compar = old_compar;
-  qsort_size = old_size;
+  if (!already_wrapped) {
+    qsort_compar = old_compar;
+    qsort_size = old_size;
+  }
   COMMON_INTERCEPTOR_WRITE_RANGE(ctx, base, nmemb * size);
 }
 #define INIT_QSORT COMMON_INTERCEPT_FUNCTION(qsort)
@@ -9893,12 +9900,19 @@
     }
   }
   qsort_r_compar_f old_compar = qsort_r_compar;
-  qsort_r_compar = compar;
   SIZE_T old_size = qsort_r_size;
-  qsort_r_size = size;
+  // Handle qsort_r() implementations that recurse using an
+  // interposable function call:
+  bool already_wrapped = compar == wrapped_qsort_r_compar;
+  if (!already_wrapped) {
+    qsort_r_compar = compar;
+    qsort_r_size = size;
+  }
   REAL(qsort_r)(base, nmemb, size, wrapped_qsort_r_compar, arg);
-  qsort_r_compar = old_compar;
-  qsort_r_size = old_size;
+  if (!already_wrapped) {
+    qsort_r_compar = old_compar;
+    qsort_r_size = old_size;
+  }
   COMMON_INTERCEPTOR_WRITE_RANGE(ctx, base, nmemb * size);
 }
 #define INIT_QSORT_R COMMON_INTERCEPT_FUNCTION(qsort_r)