Module Name:    src
Committed By:   pgoyette
Date:           Tue Jan 29 04:01:45 UTC 2019

Modified Files:
        src/sys/compat/common: if_43.c

Log Message:
The if43_20_hook function returns an errno; use it to determine whether
to allow conversion of the ioctl cmd --> ncmd

Should address issue reported by msaitoh@ on irc as well as via e-mail
from Patrick Welche and Ryo ONODERA.


To generate a diff of this commit:
cvs rdiff -u -r1.16 -r1.17 src/sys/compat/common/if_43.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

Modified files:

Index: src/sys/compat/common/if_43.c
diff -u src/sys/compat/common/if_43.c:1.16 src/sys/compat/common/if_43.c:1.17
--- src/sys/compat/common/if_43.c:1.16	Sun Jan 27 02:08:39 2019
+++ src/sys/compat/common/if_43.c	Tue Jan 29 04:01:45 2019
@@ -1,4 +1,4 @@
-/*	$NetBSD: if_43.c,v 1.16 2019/01/27 02:08:39 pgoyette Exp $	*/
+/*	$NetBSD: if_43.c,v 1.17 2019/01/29 04:01:45 pgoyette Exp $	*/
 
 /*
  * Copyright (c) 1982, 1986, 1989, 1990, 1993
@@ -32,7 +32,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_43.c,v 1.16 2019/01/27 02:08:39 pgoyette Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_43.c,v 1.17 2019/01/29 04:01:45 pgoyette Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_compat_netbsd.h"
@@ -212,8 +212,13 @@ compat_cvtcmd(u_long cmd)
 		case TAPGIFNAME:
 			return ncmd;
 		default:
-			MODULE_CALL_HOOK(if43_20_hook, (ncmd), enosys(), ncmd);
-			return ncmd;
+		    {	int rv;
+
+			MODULE_CALL_HOOK(if43_20_hook, (ncmd), enosys(), rv);
+			if (rv == 0)
+				return ncmd;
+			return cmd;
+		    }
 		}
 	}
 }

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