Date: Wed, 12 Mar 2003 08:43:58 -0800 (PST) From: John Baldwin <jhb@FreeBSD.org> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/49963: Lack of error return for some proc sysctl's Message-ID: <200303121643.h2CGhwr4091918@freefall.freebsd.org>
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>Number: 49963
>Category: kern
>Synopsis: Lack of error return for some proc sysctl's
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Mar 12 08:50:05 PST 2003
>Closed-Date:
>Last-Modified:
>Originator: John Baldwin
>Release: FreeBSD 5.0-CURRENT i386
>Organization:
>Environment:
System: FreeBSD laptop.baldwin.cx 5.0-CURRENT FreeBSD 5.0-CURRENT #799: Mon Mar 10 17:09:27 EST 2003 root@laptop.baldwin.cx:/usr/src/sys/i386/compile/LAPTOP i386
>Description:
In /sys/kern/kern_proc.c sysctl_kern_proc() and sysctl_kern_proc_args()
the functions return 0 (success) if we fail to find a process asked for
by a specific PID or if p_cansee() fails for the process. It would
seem more intuitive to return ESRCH in those cases instead.
>How-To-Repeat:
>Fix:
Index: kern_proc.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/kern_proc.c,v
retrieving revision 1.174
diff -u -r1.174 kern_proc.c
--- kern_proc.c 12 Mar 2003 16:14:55 -0000 1.174
+++ kern_proc.c 12 Mar 2003 16:43:04 -0000
@@ -865,10 +865,10 @@
return (EINVAL);
p = pfind((pid_t)name[0]);
if (!p)
- return (0);
+ return (ESRCH);
if (p_cansee(curthread, p)) {
PROC_UNLOCK(p);
- return (0);
+ return (ESRCH);
}
error = sysctl_out_proc(p, req, 0);
return (error);
@@ -1033,11 +1033,11 @@
p = pfind((pid_t)name[0]);
if (!p)
- return (0);
+ return (ESRCH);
if ((!ps_argsopen) && p_cansee(curthread, p)) {
PROC_UNLOCK(p);
- return (0);
+ return (ESRCH);
}
if (req->newptr && curproc != p) {
>Release-Note:
>Audit-Trail:
>Unformatted:
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