From: Ben Collins <bcollins@debian.org>
Date: Sun, 8 Jan 2006 09:03:04 +0000 (-0800)
Subject: [PATCH] Unchecked alloc_percpu() return in __create_workqueue()
X-Git-Tag: firefly_0821_release~39503
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=676121fcb66c861804e38d94214fd5670a1ef595;p=firefly-linux-kernel-4.4.55.git

[PATCH] Unchecked alloc_percpu() return in __create_workqueue()

__create_workqueue() not checking return of alloc_percpu()

NULL dereference was possible.

Signed-off-by: Ben Collins <bcollins@ubuntu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 62d47220696a..e72fb6478da6 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -315,6 +315,11 @@ struct workqueue_struct *__create_workqueue(const char *name,
 		return NULL;
 
 	wq->cpu_wq = alloc_percpu(struct cpu_workqueue_struct);
+	if (!wq->cpu_wq) {
+		kfree(wq);
+		return NULL;
+	}
+
 	wq->name = name;
 	/* We don't need the distraction of CPUs appearing and vanishing. */
 	lock_cpu_hotplug();