1 files changed, 129 insertions, 0 deletions
diff --git a/0090-bogus-Wstringop-overflow-with-VLA-of-elements-larger.patch b/0090-bogus-Wstringop-overflow-with-VLA-of-elements-larger.patch
new file mode 100644
index 0000000..fb51808
--- /dev/null
+++ b/0090-bogus-Wstringop-overflow-with-VLA-of-elements-larger.patch
@@ -0,0 +1,129 @@
+From bf537e82d452ee9b79f438df721c2e0dfaae12a0 Mon Sep 17 00:00:00 2001
+From: Xiong Zhou <xiongzhou4@huawei.com>
+Date: Fri, 5 May 2023 11:57:40 +0800
+Subject: [PATCH 1/2] - bogus -Wstringop-overflow with VLA of elements larger
+ than byte
+
+---
+ gcc/calls.c                                  |  5 ++
+ gcc/testsuite/gcc.dg/Wstringop-overflow-67.c | 92 ++++++++++++++++++++
+ 2 files changed, 97 insertions(+)
+ create mode 100644 gcc/testsuite/gcc.dg/Wstringop-overflow-67.c
+
+diff --git a/gcc/calls.c b/gcc/calls.c
+index 26894342c..45c137cee 100644
+--- a/gcc/calls.c
++++ b/gcc/calls.c
+@@ -2112,6 +2112,11 @@ maybe_warn_rdwr_sizes (rdwr_map *rwm, tree fndecl, tree fntype, tree exp)
+ 	}
+       else
+ 	{
++	  /* If the size cannot be determined clear it to keep it from
++	     being taken as real (and excessive).  */
++	  if (objsize && integer_all_onesp (objsize))
++	    objsize = NULL_TREE;
++
+ 	  /* For read-only and read-write attributes also set the source
+ 	     size.  */
+ 	  srcsize = objsize;
+diff --git a/gcc/testsuite/gcc.dg/Wstringop-overflow-67.c b/gcc/testsuite/gcc.dg/Wstringop-overflow-67.c
+new file mode 100644
+index 000000000..7b8f3f014
+--- /dev/null
++++ b/gcc/testsuite/gcc.dg/Wstringop-overflow-67.c
+@@ -0,0 +1,92 @@
++/* PR middle-end/100571 - bogus -Wstringop-overflow with VLA of elements
++   larger than byte
++   { dg-do compile }
++   { dg-options "-O2 -Wall" } */
++
++__attribute__ ((access (read_only, 1, 2))) void fro (int *, int);
++__attribute__ ((access (write_only, 1, 2))) void fwo (int *, int);
++__attribute__ ((access (read_write, 1, 2))) void frw (int *, int);
++
++extern __SIZE_TYPE__ n;
++
++void alloca_ro (void)
++{
++  int *a = __builtin_alloca (n * sizeof *a);
++  a[0] = 0;
++  fro (a, n);
++}
++
++void alloca_wo (void)
++{
++  int *a = __builtin_alloca (n * sizeof *a);
++  fwo (a, n);
++}
++
++void alloca_rw (void)
++{
++  int *a = __builtin_alloca (n * sizeof *a);
++  a[0] = 0;
++  frw (a, n);
++}
++
++
++void calloc_ro (void)
++{
++  int *a = __builtin_calloc (n, sizeof *a);
++  fro (a, n);
++}
++
++void calloc_wo (void)
++{
++  int *a = __builtin_calloc (n, sizeof *a);
++  fwo (a, n);
++}
++
++void calloc_rw (void)
++{
++  int *a = __builtin_calloc (n, sizeof *a);
++  a[0] = 0;
++  frw (a, n);
++}
++
++
++void malloc_ro (void)
++{
++  int *a = __builtin_malloc (n * sizeof *a);
++  a[0] = 0;
++  fro (a, n);
++}
++
++void malloc_wo (void)
++{
++  int *a = __builtin_malloc (n * sizeof *a);
++  fwo (a, n);
++}
++
++void malloc_rw (void)
++{
++  int *a = __builtin_malloc (n * sizeof *a);
++  a[0] = 0;
++  frw (a, n);
++}
++
++
++void vla_ro (void)
++{
++  int a[n];
++  a[0] = 0;
++  fro (a, n);
++}
++
++void vla_wo (void)
++{
++  int a[n];
++  fwo (a, n);
++}
++
++void vla_rw (void)
++{
++  int a[n];
++  a[0] = 0;
++  frw (a, n);
++}
+-- 
+2.33.0
+