Commit 2860aaba authored Oct 04, 2006 by Josh Triplett Committed by Linus Torvalds Oct 04, 2006

[PATCH] rcu: Avoid kthread_stop on invalid pointer if rcutorture reader startup fails

rcu_torture_init kmallocs the array of reader threads, then creates each
one with kthread_run, cleaning up with rcu_torture_cleanup if this fails.
rcu_torture_cleanup calls kthread_stop on any non-NULL pointer in the
array; however, any readers after the one that failed to start up will have
invalid pointers, not null pointers. Avoid this by using kzalloc instead.

Signed-off-by: Josh Triplett <josh@freedesktop.org>
Acked-by: Paul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent 3c29e03d

kernel/rcutorture.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -780,7 +780,7 @@ rcu_torture_init(void)
		writer_task = NULL;
		goto unwind;
		}
		reader_tasks = kmalloc(nrealreaders * sizeof(reader_tasks[0]),
		reader_tasks = kzalloc(nrealreaders * sizeof(reader_tasks[0]),
		GFP_KERNEL);
		if (reader_tasks == NULL) {
		VERBOSE_PRINTK_ERRSTRING("out of memory");