From: Richard Biener <rguenther@suse.de>
Date: Mon, 26 Oct 2020 09:10:46 +0000 (+0100)
Subject: middle-end/97554 - avoid overflow in alloc size compute
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=50f9e1f4d458e36d306b2449c689e45492847f68;p=gcc.git

middle-end/97554 - avoid overflow in alloc size compute

This avoids overflow in the allocation size computations in
sbitmap_vector_alloc when the result exceeds 2GB.

2020-10-26  Richard Biener  <rguenther@suse.de>

	* sbitmap.c (sbitmap_vector_alloc): Use size_t for byte
	quantities to avoid overflow.
---

diff --git a/gcc/sbitmap.c b/gcc/sbitmap.c
index 292e7eede5a..3a43fe35bb1 100644
--- a/gcc/sbitmap.c
+++ b/gcc/sbitmap.c
@@ -139,7 +139,8 @@ sbitmap_realloc (sbitmap src, unsigned int n_elms)
 sbitmap *
 sbitmap_vector_alloc (unsigned int n_vecs, unsigned int n_elms)
 {
-  unsigned int i, bytes, offset, elm_bytes, size, amt, vector_bytes;
+  unsigned int i, size;
+  size_t amt, bytes, vector_bytes, elm_bytes, offset;
   sbitmap *bitmap_vector;
 
   size = SBITMAP_SET_SIZE (n_elms);