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get the vmspace first before you try to use it.

This commit is contained in:
christos 2006-12-06 18:54:02 +00:00
parent a85304c52e
commit 99f8337886
1 changed files with 7 additions and 7 deletions
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14
sys/kern/sys_process.c
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@ -1,4 +1,4 @@
/* $NetBSD: sys_process.c,v 1.117 2006/12/04 18:50:19 elad Exp $ */
/* $NetBSD: sys_process.c,v 1.118 2006/12/06 18:54:02 christos Exp $ */
/*-
* Copyright (c) 1982, 1986, 1989, 1993
@ -93,7 +93,7 @@
#include "opt_ktrace.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sys_process.c,v 1.117 2006/12/04 18:50:19 elad Exp $");
__KERNEL_RCSID(0, "$NetBSD: sys_process.c,v 1.118 2006/12/06 18:54:02 christos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -337,7 +337,6 @@ sys_ptrace(struct lwp *l, void *v, register_t *retval)
error = copyin(SCARG(uap, addr), &piod, sizeof(piod));
if (error)
return (error);
uio.uio_vmspace = vm;
switch (piod.piod_op) {
case PIOD_READ_D:
case PIOD_READ_I:
@ -359,16 +358,17 @@ sys_ptrace(struct lwp *l, void *v, register_t *retval)
default:
return (EINVAL);
}
error = proc_vmspace_getref(l->l_proc, &vm);
if (error) {
return error;
}
iov.iov_base = piod.piod_addr;
iov.iov_len = piod.piod_len;
uio.uio_iov = &iov;
uio.uio_iovcnt = 1;
uio.uio_offset = (off_t)(unsigned long)piod.piod_offs;
uio.uio_resid = piod.piod_len;
error = proc_vmspace_getref(l->l_proc, &vm);
if (error) {
return error;
}
uio.uio_vmspace = vm;
error = kauth_authorize_process(l->l_cred,
KAUTH_PROCESS_CANPTRACE, t, KAUTH_ARG(SCARG(uap, req)),