Check for bogus (negative) signal numbers

git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@617375 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 2 insertions, 2 deletions

diff --git a/threadproc/unix/signals.c b/threadproc/unix/signals.c
index 46acc1d1f..57a31af97 100644
--- a/threadproc/unix/signals.c
+++ b/threadproc/unix/signals.c
@@ -116,7 +116,7 @@ void apr_signal_init(apr_pool_t *pglobal)
 }
 const char *apr_signal_description_get(int signum)
 {
-    return sys_siglist[signum];
+    return (signum >= 0) ? sys_siglist[signum] : "unknown signal (number)";
 }
 
 #else /* !(SYS_SIGLIST_DECLARED || HAVE_DECL_SYS_SIGLIST) */
@@ -262,7 +262,7 @@ void apr_signal_init(apr_pool_t *pglobal)
 const char *apr_signal_description_get(int signum)
 {
     return
-        signum < APR_NUMSIG
+        (signum >= 0 && signum < APR_NUMSIG)
         ? signal_description[signum]
         : "unknown signal (number)";
 }