From: Liubov Dmitrieva <liubov.dmitrieva@intel.com>
Date: Sat, 22 Dec 2012 16:51:45 +0000 (+0400)
Subject: Buffer overrun detected by Intel MPX at sysdeps/unix/sysv/linux/ifaddrs.c [BZ 15698]
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3bfd26d36c5ec07910d1cf6b6df7c8f331964824;p=thirdparty%2Fglibc.git

Buffer overrun detected by Intel MPX at sysdeps/unix/sysv/linux/ifaddrs.c [BZ 15698]
---

diff --git a/sysdeps/unix/sysv/linux/ifaddrs.c b/sysdeps/unix/sysv/linux/ifaddrs.c
index 89fda156a21..4f5f7b5d46c 100644
--- a/sysdeps/unix/sysv/linux/ifaddrs.c
+++ b/sysdeps/unix/sysv/linux/ifaddrs.c
@@ -782,9 +782,11 @@ getifaddrs_internal (struct ifaddrs **ifap)
 
 		      for (i = 0; i < (preflen / 8); i++)
 			*cp++ = 0xff;
-		      c = 0xff;
-		      c <<= (8 - (preflen % 8));
-		      *cp = c;
+				if (preflen < max_prefixlen) {
+		        c = 0xff;
+		        c <<= (8 - (preflen % 8));
+		        *cp = c;
+				}
 		    }
 		}
 	    }