krb5 commit [krb5-1.17]: Don't skip past zero byte in profile parsing

https://github.com/krb5/krb5/commit/ec12007a9b0c048e304715cbe07b13338cbfac11
commit ec12007a9b0c048e304715cbe07b13338cbfac11
Author: Greg Hudson <[email protected]>
Date:   Wed Aug 14 11:46:14 2019 -0400

    Don't skip past zero byte in profile parsing
    
    In parse_quoted_string(), only process an escape sequence if there is
    a second character after the backlash, to avoid reading past the
    terminating zero byte.  Reported by Lutz Justen.
    
    (cherry picked from commit a449bfc16c32019fec8b4deea963a3e474b0d14d)
    
    ticket: 8825
    version_fixed: 1.17.1

 src/util/profile/prof_parse.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/util/profile/prof_parse.c b/src/util/profile/prof_parse.c
index 531e4a0..7ba44ac 100644
--- a/src/util/profile/prof_parse.c
+++ b/src/util/profile/prof_parse.c
@@ -48,7 +48,7 @@ static void parse_quoted_string(char *str)
     char *to, *from;
 
     for (to = from = str; *from && *from != '"'; to++, from++) {
-        if (*from == '\\') {
+        if (*from == '\\' && *(from + 1) != '\0') {
             from++;
             switch (*from) {
             case 'n':