Writes to the ps_flags field of struct process should be atomic.

Ok deraadt@ guenther@

diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c
index bfce966..31122a2 100644 (file)
--- a/sys/kern/vfs_syscalls.c
+++ b/sys/kern/vfs_syscalls.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: vfs_syscalls.c,v 1.355 2022/02/15 23:16:00 rob Exp $  */
+/*     $OpenBSD: vfs_syscalls.c,v 1.356 2022/02/17 03:12:34 rob Exp $  */
 /*     $NetBSD: vfs_syscalls.c,v 1.71 1996/04/23 10:29:02 mycroft Exp $        */
 
 /*
@@ -829,7 +829,7 @@ sys_chroot(struct proc *p, void *v, register_t *retval)
                vrele(old_cdir);
        } else
                fdp->fd_rdir = nd.ni_vp;
-       p->p_p->ps_flags |= PS_CHROOT;
+       atomic_setbits_int(&p->p_p->ps_flags, PS_CHROOT);
        return (0);
 }