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Test for valid interface for ioctls that demand it. 

Thanks to Robert Swindells for the patch.
This commit is contained in:
roy 2018-04-26 08:11:18 +00:00
parent aaf2c2df36
commit e3e276e2f2
1 changed files with 15 additions and 5 deletions
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20
sys/compat/common/uipc_syscalls_50.c
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@ -1,4 +1,4 @@
/* $NetBSD: uipc_syscalls_50.c,v 1.4 2018/04/12 18:50:13 christos Exp $ */
/* $NetBSD: uipc_syscalls_50.c,v 1.5 2018/04/26 08:11:18 roy Exp $ */
/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uipc_syscalls_50.c,v 1.4 2018/04/12 18:50:13 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: uipc_syscalls_50.c,v 1.5 2018/04/26 08:11:18 roy Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
@ -63,10 +63,19 @@ compat_ifdatareq(struct lwp *l, u_long cmd, void *data)
struct ifnet *ifp;
int error;
ifp = ifunit(ifdr->ifdr_name);
if (ifp == NULL)
return ENXIO;
/* Validate arguments. */
switch (cmd) {
case SIOCGIFDATA:
case SIOCZIFDATA:
ifp = ifunit(ifdr->ifdr_name);
if (ifp == NULL)
return ENXIO;
break;
default:
return ENOSYS;
}
/* Do work. */
switch (cmd) {
case SIOCGIFDATA:
ifdatan2o(&ifdr->ifdr_data, &ifp->if_data);
@ -91,6 +100,7 @@ compat_ifdatareq(struct lwp *l, u_long cmd, void *data)
return 0;
default:
/* Impossible due to above validation, but makes gcc happy. */
return ENOSYS;
}
}