- fix *** %n in writable segment detected ***

Changed files:
    cvs-printf-n.patch -> 1.1

diff --git a/cvs-printf-n.patch b/cvs-printf-n.patch
new file mode 100644 (file)
index 0000000..761fef0
--- /dev/null
+++ b/cvs-printf-n.patch
@@ -0,0 +1,27 @@
+--- cvs-1.12.13/lib/vasnprintf.c       2005-05-23 19:44:33.000000000 +0200
++++ cvs-1.12.13/lib/vasnprintf.c       2009-02-10 20:38:47.947197650 +0100
+@@ -558,9 +558,21 @@
+                 }
+               *p = dp->conversion;
+ #if USE_SNPRINTF
+-              p[1] = '%';
+-              p[2] = 'n';
+-              p[3] = '\0';
++# if !(__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) 
++              p[1] = '%'; 
++              p[2] = 'n'; 
++              p[3] = '\0'; 
++# else 
++              /* On glibc2 systems from glibc >= 2.3 - probably also older 
++                 ones - we know that snprintf's returns value conforms to 
++                 ISO C 99: the gl_SNPRINTF_DIRECTIVE_N test passes. 
++                 Therefore we can avoid using %n in this situation. 
++                 On glibc2 systems from 2004-10-18 or newer, the use of %n 
++                 in format strings in writable memory may crash the program 
++                 (if compiled with _FORTIFY_SOURCE=2), so we should avoid it 
++                 in this situation.  */ 
++              p[1] = '\0'; 
++# endif
+ #else
+               p[1] = '\0';
+ #endif