* syscalls.cc (utmp_data): Fix potential buffer overflow.

2011-01-31 13:58:59 +00:00
parent adef8606bd
commit 2daa7e07ce
2 changed files with 5 additions and 1 deletions
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -3508,7 +3508,7 @@ static struct utmp utmp_data_buf[16];
 static unsigned utix = 0;
 #define nutdbuf (sizeof (utmp_data_buf) / sizeof (utmp_data_buf[0]))
 #define utmp_data ({ \
-  if (utix > nutdbuf) \
+  if (utix >= nutdbuf) \
    utix = 0; \
  utmp_data_buf + utix++; \
 })