Check stack pointer to be inside stack when unwinding.

sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc

Index: sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc
diff --git a/sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc b/sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc
index 2bf572c0b3cd84d640db6abbcb7dcadb511060e4..6e4e699797091dc6eaf6657c467f9ab1c8e08ebf 100644
--- a/sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc
+++ b/sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc
@@ -11,6 +11,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include "base/debug/debugging_flags.h"
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "sandbox/linux/bpf_dsl/bpf_dsl.h"
@@ -126,6 +127,14 @@ ResultExpr EvaluateSyscallImpl(int fs_denied_errno,
 #endif  // defined(ADDRESS_SANITIZER) || defined(THREAD_SANITIZER) ||
         // defined(MEMORY_SANITIZER)
 
+#if BUILDFLAG(ENABLE_PROFILING)
+  // Native heap profiler uses mincore() to determine stack boundary,
+  // see base/debug/stack_trace.cc.
+  if (sysno == __NR_mincore) {
+    return Allow();
+  }
+#endif
+
   if (IsBaselinePolicyAllowed(sysno)) {
     return Allow();
   }