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From: Mark Johnston <markj@FreeBSD.org>
Date: Sun, 9 Jul 2017 22:57:00 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r320852 - head/sys/compat/linuxkpi/common/src
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Author: markj
Date: Sun Jul  9 22:57:00 2017
New Revision: 320852
URL: https://svnweb.freebsd.org/changeset/base/320852

Log:
  Free existing per-thread task structs when unloading linuxkpi.ko.
  
  They are otherwise leaked.
  
  Reported and tested by:	ae
  MFC after:		1 week

Modified:
  head/sys/compat/linuxkpi/common/src/linux_current.c

Modified: head/sys/compat/linuxkpi/common/src/linux_current.c
==============================================================================
--- head/sys/compat/linuxkpi/common/src/linux_current.c	Sun Jul  9 22:53:24 2017	(r320851)
+++ head/sys/compat/linuxkpi/common/src/linux_current.c	Sun Jul  9 22:57:00 2017	(r320852)
@@ -226,6 +226,23 @@ SYSINIT(linux_current, SI_SUB_EVENTHANDLER, SI_ORDER_S
 static void
 linux_current_uninit(void *arg __unused)
 {
+	struct proc *p;
+	struct task_struct *ts;
+	struct thread *td;
+
+	sx_slock(&allproc_lock);
+	FOREACH_PROC_IN_SYSTEM(p) {
+		PROC_LOCK(p);
+		FOREACH_THREAD_IN_PROC(p, td) {
+			if ((ts = td->td_lkpi_task) != NULL) {
+				td->td_lkpi_task = NULL;
+				put_task_struct(ts);
+			}
+		}
+		PROC_UNLOCK(p);
+	}
+	sx_sunlock(&allproc_lock);
+
 	EVENTHANDLER_DEREGISTER(thread_dtor, linuxkpi_thread_dtor_tag);
 }
 SYSUNINIT(linux_current, SI_SUB_EVENTHANDLER, SI_ORDER_SECOND, linux_current_uninit, NULL);