Fix erroneous error message printout when a configuration file contains

an overlength token.  Printout was always garbage and could dump core
entirely :-(.  Per report from Martin Pitt.

diff --git a/src/backend/libpq/hba.c b/src/backend/libpq/hba.c
index d77ae5b830ceab3c90ee89bc856555525b350eb5..0f508e910298a594ad86d343bc8a8fbd1a8edb53 100644 (file)
--- a/src/backend/libpq/hba.c
+++ b/src/backend/libpq/hba.c
@@ -124,14 +124,14 @@ next_token(FILE *fp, char *buf, const int bufsz)
 
                        if (buf >= end_buf)
                        {
+                               *buf = '\0';
                                ereport(LOG,
                                                (errcode(ERRCODE_CONFIG_FILE_ERROR),
                                                 errmsg("authentication file token too long, skipping: \"%s\"",
-                                                               buf)));
+                                                               start_buf)));
                                /* Discard remainder of line */
                                while ((c = getc(fp)) != EOF && c != '\n')
                                        ;
-                               buf[0] = '\0';
                                break;
                        }