Misc (re #1068): fixed possible reading string beyond the buffer in pj_strltrim() if the string only contains whitespaces (thanks Jones Desougi for the report)

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@3207 74dad513-b988-da41-8d7b-12977e46ad98

1 files changed, 2 insertions, 1 deletions

diff --git a/pjlib/src/pj/string.c b/pjlib/src/pj/string.c
index 807962b0..073cf26f 100644
--- a/pjlib/src/pj/string.c
+++ b/pjlib/src/pj/string.c
@@ -69,8 +69,9 @@ PJ_DEF(char*) pj_stristr(const pj_str_t *str, const pj_str_t *substr)
 
 PJ_DEF(pj_str_t*) pj_strltrim( pj_str_t *str )
 {
+    char *end = str->ptr + str->slen;
     register char *p = str->ptr;
-    while (pj_isspace(*p))
+    while (p < end && pj_isspace(*p))
 	++p;
     str->slen -= (p - str->ptr);
     str->ptr = p;