X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=kernel%2Fcgroup.c;h=6d8de051382b0687ab1a449c245ebb2f05cd38f0;hb=e34ba212225a27cdf5f974be22cc539ae7ee7ca5;hp=2727f92383596e4a6f7bec5072b1e804a7801916;hpb=858c52d15f186e055dc33a1872f5b45a66d42296;p=linux-2.6

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 2727f92383..6d8de05138 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1722,7 +1722,12 @@ void cgroup_enable_task_cg_lists(void)
 	use_task_css_set_links = 1;
 	do_each_thread(g, p) {
 		task_lock(p);
-		if (list_empty(&p->cg_list))
+		/*
+		 * We should check if the process is exiting, otherwise
+		 * it will race with cgroup_exit() in that the list
+		 * entry won't be deleted though the process has exited.
+		 */
+		if (!(p->flags & PF_EXITING) && list_empty(&p->cg_list))
 			list_add(&p->cg_list, &p->cgroups->tasks);
 		task_unlock(p);
 	} while_each_thread(g, p);