The problem has been reported to [email protected] by mail but there was no
response. For now it is safer to disable line wrapping than trying to fix
various buffer overflows in the code.

--- psutils/pserror.c	2014-01-23 15:47:09.375709690 +0100
+++ psutils/pserror.c	2014-01-23 15:46:57.742698912 +0100
@@ -12,111 +12,31 @@
 #include "patchlev.h"
 
 #include <string.h>
+#include <stdio.h>
+#include <stdarg.h>
 
 /* Message functions; there is a single are varargs functions for messages,
    warnings, and errors sent to stderr. If called with the flags MESSAGE_EXIT
    set, the routine does not return */
-
-#define MAX_MESSAGE	256	/* maximum formatted message length */
-#define MAX_FORMAT	16	/* maximum format length */
-#define MAX_COLUMN	78	/* maximum column to print upto */
-
 void message(int flags, char *format, ...)
 {
   va_list args ;
-  static column = 0 ;		/* current screen column for message wrap */
-  char msgbuf[MAX_MESSAGE] ;	/* buffer in which to put the message */
-  char *bufptr = msgbuf ;	/* message buffer pointer */
 
-  if ( (flags & MESSAGE_NL) && column != 0 ) {	/* new line if not already */
+  if ( flags & MESSAGE_NL ) {	/* new line if not already */
     putc('\n', stderr) ;
-    column = 0 ;
   }
-    
+
   if ( flags & MESSAGE_PROGRAM ) {
-    strcpy(bufptr, program) ;
-    bufptr += strlen(program) ;
-    *bufptr++ = ':' ;
-    *bufptr++ = ' ' ;
+    fprintf (stderr, "%s: ", program);
   }
 
   va_start(args, format) ;
-  if ( format != NULL ) {
-    char c ;
-    while ( (c = *format++) != '\0' ) {
-      if (c == '%') {
-	int done, longform, index ;
-	char fmtbuf[MAX_FORMAT] ;
-	longform = index = 0 ;
-	fmtbuf[index++] = c ;
-	do {
-	  done = 1 ;
-	  fmtbuf[index++] = c = *format++ ;
-	  fmtbuf[index] = '\0' ;
-	  switch (c) {
-	  case '%':
-	    *bufptr++ = '%' ;
-	  case '\0':
-	    break ;
-	  case 'e': case 'E': case 'f': case 'g': case 'G':
-	    {
-	      double d = va_arg(args, double) ;
-	      sprintf(bufptr, fmtbuf, d) ;
-	      bufptr += strlen(bufptr) ;
-	    }
-	    break ;
-	  case 'c': case 'd': case 'i': case 'o':
-	  case 'p': case 'u': case 'x': case 'X':
-	    if ( longform ) {
-	      long l = va_arg(args, long) ;
-	      sprintf(bufptr, fmtbuf, l) ;
-	    } else {
-	      int i = va_arg(args, int) ;
-	      sprintf(bufptr, fmtbuf, i) ;
-	    }
-	    bufptr += strlen(bufptr) ;
-	    break ;
-	  case 's':
-	    {
-	      char *s = va_arg(args, char *) ;
-	      sprintf(bufptr, fmtbuf, s) ;
-	      bufptr += strlen(bufptr) ;
-	    }
-	    break ;
-	  case 'l':
-	    longform = 1 ;
-	    /* FALLTHRU */
-	  default:
-	    done = 0 ;
-	  }
-	} while ( !done ) ;
-      } else if ( c == '\n' ) {	/* write out message so far and reset column */
-	int len = bufptr - msgbuf ;	/* length of current message */
-	*bufptr++ = '\n' ;
-	*bufptr = '\0' ;
-	if ( column + len > MAX_COLUMN && column > 0 ) {
-	  putc('\n', stderr) ;
-	  column = 0 ;
-	}
-	fputs(bufptr = msgbuf, stderr) ;
-	column = 0 ;
-      } else
-	*bufptr++ = c ;
-    }
-    *bufptr = '\0' ;
-    {
-      int len = bufptr - msgbuf ;	/* length of current message */
-      if ( column + len > MAX_COLUMN && column > 0 ) {
-	putc('\n', stderr) ;
-	column = 0 ;
-      }
-      fputs(msgbuf, stderr) ;
-      column += len ;
-    }
-    fflush(stderr) ;
-  }
+  if ( format != NULL )
+    vfprintf(stderr, format, args);
   va_end(args) ;
 
+  fflush(stderr);
+
   if ( flags & MESSAGE_EXIT )	/* don't return to program */
     exit(1) ;
 }