Author: sjg
Date: Fri Jun 19 17:19:20 2015
New Revision: 284600
URL: https://svnweb.freebsd.org/changeset/base/284600
Log:
filemon_pid_check needs to hold proctree_lock
Reviewed by: kib
MFC after: few days
Modified:
head/sys/dev/filemon/filemon_wrapper.c
Modified: head/sys/dev/filemon/filemon_wrapper.c
==============================================================================
--- head/sys/dev/filemon/filemon_wrapper.c Fri Jun 19 17:00:36 2015
(r284599)
+++ head/sys/dev/filemon/filemon_wrapper.c Fri Jun 19 17:19:20 2015
(r284600)
@@ -28,6 +28,8 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
+#include <sys/sx.h>
+
#include "opt_compat.h"
#if __FreeBSD_version > 800032
@@ -84,13 +86,17 @@ filemon_pid_check(struct proc *p)
{
struct filemon *filemon;
- while (p->p_pptr) {
+ sx_slock(&proctree_lock);
+ while (p != initproc) {
TAILQ_FOREACH(filemon, &filemons_inuse, link) {
- if (p->p_pid == filemon->pid)
+ if (p->p_pid == filemon->pid) {
+ sx_xunlock(&proctree_lock);
return (filemon);
+ }
}
- p = p->p_pptr;
+ p = proc_realparent(p);
}
+ sx_xunlock(&proctree_lock);
return (NULL);
}
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