From 2353f2bea307390e015493118e425152b8a5a431 Mon Sep 17 00:00:00 2001 From: Jiri Kosina Date: Tue, 16 Apr 2013 15:40:09 -0700 Subject: HID: protect hid_debug_list Accesses to hid_device->hid_debug_list are not serialized properly, which could result in SMP concurrency issues when HID debugfs events are accessesed by multiple userspace processess. Serialize all the list operations by a mutex. Spotted by Al Viro. Signed-off-by: Jiri Kosina --- include/linux/hid.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/hid.h') diff --git a/include/linux/hid.h b/include/linux/hid.h index e14b465b1146..06579c72d195 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -512,6 +512,7 @@ struct hid_device { /* device report descriptor */ struct dentry *debug_rdesc; struct dentry *debug_events; struct list_head debug_list; + struct mutex debug_list_lock; wait_queue_head_t debug_wait; }; -- cgit v1.2.3