[or-cvs] [tor/release-0.2.2] Check size against SIZE_T_CEILING in realloc too.

[arma at torproject.org]

commit e09ab69703967716b2765e062ca229e641dba53e
Author: Nick Mathewson <nickm at torproject.org>
Date:   Mon Jan 3 15:15:27 2011 -0500

    Check size against SIZE_T_CEILING in realloc too.
    
    Fixes bug 2324.
---
 changes/bug2324   |    4 ++++
 src/common/util.c |    2 ++
 2 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/changes/bug2324 b/changes/bug2324
new file mode 100644
index 0000000..eefc837
--- /dev/null
+++ b/changes/bug2324
@@ -0,0 +1,4 @@
+  o Minor bugfixes
+    - Add a check for SIZE_T_MAX to tor_realloc to try to avoid
+      underflow errors there too.  Fixes bug 2324.
+
diff --git a/src/common/util.c b/src/common/util.c
index 2b1430c..7a24df8 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -167,6 +167,8 @@ _tor_realloc(void *ptr, size_t size DMALLOC_PARAMS)
 {
   void *result;
 
+  tor_assert(size < SIZE_T_CEILING);
+
 #ifdef USE_DMALLOC
   result = dmalloc_realloc(file, line, ptr, size, DMALLOC_FUNC_REALLOC, 0);
 #else