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As fd_lastfile might be negative, we can't use the (u_int) cast trick to 

compare fd and fdp->fd_lastfile in fdrelease(), so change the test to a
more explicit one.  Spotted by Matt Thomas.

Should fix the panic reported by Matthias Scheler.
This commit is contained in:
cube 2005-01-14 00:25:12 +00:00
parent db5b1f2fa2
commit fade05f67f
1 changed files with 3 additions and 3 deletions
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6
sys/kern/kern_descrip.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_descrip.c,v 1.128 2005/01/12 20:41:45 cube Exp $ */ /* $NetBSD: kern_descrip.c,v 1.129 2005/01/14 00:25:12 cube Exp $ */
/* /*
* Copyright (c) 1982, 1986, 1989, 1991, 1993 * Copyright (c) 1982, 1986, 1989, 1991, 1993
@ -37,7 +37,7 @@
*/ */
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_descrip.c,v 1.128 2005/01/12 20:41:45 cube Exp $"); __KERNEL_RCSID(0, "$NetBSD: kern_descrip.c,v 1.129 2005/01/14 00:25:12 cube Exp $");
#include <sys/param.h> #include <sys/param.h>
#include <sys/systm.h> #include <sys/systm.h>
@ -604,7 +604,7 @@ fdrelease(struct proc *p, int fd)
fdp = p->p_fd; fdp = p->p_fd;
simple_lock(&fdp->fd_slock); simple_lock(&fdp->fd_slock);
if ((u_int) fd > fdp->fd_lastfile) if (fd < 0 || fd > fdp->fd_lastfile)
goto badf; goto badf;
fpp = &fdp->fd_ofiles[fd]; fpp = &fdp->fd_ofiles[fd];
fp = *fpp; fp = *fpp;