[src/trunk]: src/sys/kern Correctly handle the NULL path when no compat_10 co...

[pgoyette <pgoyette%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d4822c3c66a0
branches:  trunk
changeset: 448564:d4822c3c66a0
user:      pgoyette <pgoyette%NetBSD.org@localhost>
date:      Tue Feb 05 08:53:18 2019 +0000

description:
Correctly handle the NULL path when no compat_10 code is available.

This should address kern/53948 (thanks, kamil@, for the PR and for
testing the fix)

diffstat:

 sys/kern/vfs_syscalls.c |  15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)

diffs (38 lines):

diff -r a612f6ed020c -r d4822c3c66a0 sys/kern/vfs_syscalls.c
--- a/sys/kern/vfs_syscalls.c   Tue Feb 05 08:33:25 2019 +0000
+++ b/sys/kern/vfs_syscalls.c   Tue Feb 05 08:53:18 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vfs_syscalls.c,v 1.521 2019/01/31 02:27:06 manu Exp $  */
+/*     $NetBSD: vfs_syscalls.c,v 1.522 2019/02/05 08:53:18 pgoyette Exp $      */
 
 /*-
  * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
@@ -70,7 +70,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vfs_syscalls.c,v 1.521 2019/01/31 02:27:06 manu Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vfs_syscalls.c,v 1.522 2019/02/05 08:53:18 pgoyette Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_fileassoc.h"
@@ -1635,14 +1635,13 @@
        int error;
 
        if (path == NULL) {
-               MODULE_CALL_HOOK(vfs_openat_10_hook, (&pb), 0, error);
-               if (error)
-                       return error;
-       } else {
-               error = pathbuf_copyin(path, &pb);
-               if (error)
+               MODULE_CALL_HOOK(vfs_openat_10_hook, (&pb), enosys(), error);
+               if (error != ENOSYS)
                        return error;
        }
+       error = pathbuf_copyin(path, &pb);
+       if (error)
+               return error;
 
        pathstring = pathbuf_stringcopy_get(pb);