svn commit: r349456 - stable/12/usr.sbin/mountd

[Alexander Motin]

Author: mav
Date: Thu Jun 27 14:10:58 2019
New Revision: 349456
URL: https://svnweb.freebsd.org/changeset/base/349456

Log:
  MFC r349376: Fix strsep_quote() on strings without quotes.
  
  For strings without quotes and escapes dstptr and srcptr are equal, so
  zeroing *dstptr before checking *srcptr is not a good idea.  In practice
  it means that in -maproot=65534:65533 everything after the colon is lost.
  
  The problem was there since r293305, but before r346976 it was covered by
  improper strsep_quote() usage.
  
  PR:	238725

Modified:
  stable/12/usr.sbin/mountd/mountd.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/usr.sbin/mountd/mountd.c
==============================================================================
--- stable/12/usr.sbin/mountd/mountd.c	Thu Jun 27 14:03:32 2019	(r349455)
+++ stable/12/usr.sbin/mountd/mountd.c	Thu Jun 27 14:10:58 2019	(r349456)
@@ -351,8 +351,8 @@ strsep_quote(char **stringp, const char *delim)
 		*dstptr++ = *srcptr++;
 	}
 
-	*dstptr = 0; /* Terminate the string */
 	*stringp = (*srcptr == '\0') ? NULL : srcptr + 1;
+	*dstptr = 0; /* Terminate the string */
 	return (retval);
 }