Module Name: src
Committed By: reinoud
Date: Tue Dec 20 19:49:36 UTC 2011
Modified Files:
src/sys/uvm: uvm_mmap.c
Log Message:
If we need to set the PK_CHKNOSYSCALL flag in struct proc be so nice to first
take the mutex. Tnx for pointing it out to me.
To generate a diff of this commit:
cvs rdiff -u -r1.140 -r1.141 src/sys/uvm/uvm_mmap.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/uvm/uvm_mmap.c
diff -u src/sys/uvm/uvm_mmap.c:1.140 src/sys/uvm/uvm_mmap.c:1.141
--- src/sys/uvm/uvm_mmap.c:1.140 Tue Dec 20 15:39:35 2011
+++ src/sys/uvm/uvm_mmap.c Tue Dec 20 19:49:36 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: uvm_mmap.c,v 1.140 2011/12/20 15:39:35 reinoud Exp $ */
+/* $NetBSD: uvm_mmap.c,v 1.141 2011/12/20 19:49:36 reinoud Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
@@ -46,7 +46,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: uvm_mmap.c,v 1.140 2011/12/20 15:39:35 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: uvm_mmap.c,v 1.141 2011/12/20 19:49:36 reinoud Exp $");
#include "opt_compat_netbsd.h"
#include "opt_pax.h"
@@ -560,8 +560,12 @@ sys_mmap(struct lwp *l, const struct sys
panic("uvm_setattr failed?");
}
/* record if we need optimization for system call checking */
- if (flags & MAP_NOSYSCALLS)
+ if ((flags & MAP_NOSYSCALLS) &&
+ ((p->p_flag & PK_CHKNOSYSCALL) == 0)) {
+ mutex_enter(p->p_lock);
p->p_flag |= PK_CHKNOSYSCALL;
+ mutex_exit(p->p_lock);
+ }
}
if (fp != NULL)
