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Ensure nbytes > 0. Otherwise bad things may happen.

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Compile-tested only.

ok christos@
This commit is contained in:
maxv 2014-08-24 12:48:58 +00:00
parent c23681cc0d
commit 8db2bbfd52
1 changed files with 8 additions and 3 deletions
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11
sys/compat/osf1/osf1_file.c
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@ -1,4 +1,4 @@
/* $NetBSD: osf1_file.c,v 1.41 2011/07/22 10:02:08 njoly Exp $ */
/* $NetBSD: osf1_file.c,v 1.42 2014/08/24 12:48:58 maxv Exp $ */
/*
* Copyright (c) 1999 Christopher G. Demetriou. All rights reserved.
@ -58,7 +58,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: osf1_file.c,v 1.41 2011/07/22 10:02:08 njoly Exp $");
__KERNEL_RCSID(0, "$NetBSD: osf1_file.c,v 1.42 2014/08/24 12:48:58 maxv Exp $");
#if defined(_KERNEL_OPT)
#include "opt_syscall_debug.h"
@ -133,7 +133,7 @@ osf1_sys_getdirentries(struct lwp *l, const struct osf1_sys_getdirentries_args *
/* {
syscallarg(int) fd;
syscallarg(char *) buf;
syscallarg(u_int) nbytes;
syscallarg(int) nbytes;
syscallarg(long *) basep;
} */
struct dirent *bdp;
@ -151,6 +151,11 @@ osf1_sys_getdirentries(struct lwp *l, const struct osf1_sys_getdirentries_args *
off_t *cookiebuf = NULL, *cookie;
int ncookies, fd;
if (SCARG(uap, nbytes) < 0)
return EINVAL;
if (SCARG(uap, nbytes) == 0)
return 0;
fd = SCARG(uap, fd);
if ((error = fd_getvnode(fd, &fp)) != 0)
return (error);