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Index: miscfs/procfs/procfs_ctl.c
===================================================================
RCS file: /home/ncvs/src/sys/miscfs/procfs/procfs_ctl.c,v
retrieving revision 1.20
retrieving revision 1.20.2.1
diff -u -r1.20 -r1.20.2.1
--- miscfs/procfs/procfs_ctl.c 1999/12/08 08:59:36 1.20
+++ miscfs/procfs/procfs_ctl.c 2000/12/17 03:13:05 1.20.2.1
@@ -111,6 +111,20 @@
int error;
/*
+ * Authorization check: rely on normal debugging protection, except
+ * allow processes to disengage debugging on a process onto which
+ * they have previously attached, but no longer have permission to
+ * debug.
+ */
+ if (op != PROCFS_CTL_DETACH) {
+ if (securelevel > 0 && p->p_pid == 1)
+ return (EPERM);
+
+ if (!CHECKIO(curp, p) || p_trespass(curp, p))
+ return (EPERM);
+ }
+
+ /*
* Attach - attaches the target process for debugging
* by the calling process.
*/
@@ -122,10 +136,6 @@
/* can't trace yourself! */
if (p->p_pid == curp->p_pid)
return (EINVAL);
-
- /* can't trace init when securelevel > 0 */
- if (securelevel > 0 && p->p_pid == 1)
- return (EPERM);
/*
* Go ahead and set the trace flag.
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