Messages in this thread Patch in this message | | | Date | Mon, 7 Aug 2006 11:59:17 -0400 | From | "Zephaniah E. Hull" <> | Subject | [patch] Crash on evdev disconnect. |
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While trying to figure out the best way to handle an odd mouse, I found that we oopsed when doing a rmmod on usbhid while someone had a USB device open through evdev.
We try to loop through evdev->list, calling kill_fasync on each member, however by the time we try to get the next pointer, we have already freed the member and poisoned the next/last.
The fix is fairly simple, and if nobody objects I think we should try and get this into -stable too.
Signed-off-by: "Zephaniah E. Hull" <warp@aehallh.com>
diff -ur linux-test/drivers/input/evdev.c linux-2.6/drivers/input/evdev.c --- linux-test/drivers/input/evdev.c 2006-07-24 23:36:01.000000000 -0400 +++ linux-2.6/drivers/input/evdev.c 2006-08-07 11:41:13.000000000 -0400 @@ -659,7 +659,7 @@ static void evdev_disconnect(struct input_handle *handle) { struct evdev *evdev = handle->private; - struct evdev_list *list; + struct evdev_list *list, *next; sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name); class_device_destroy(&input_class, @@ -669,7 +669,7 @@ if (evdev->open) { input_close_device(handle); wake_up_interruptible(&evdev->wait); - list_for_each_entry(list, &evdev->list, node) + list_for_each_entry_safe(list, next, &evdev->list, node) kill_fasync(&list->fasync, SIGIO, POLL_HUP); } else evdev_free(evdev); -- 1024D/E65A7801 Zephaniah E. Hull <warp@aehallh.com> 92ED 94E4 B1E6 3624 226D 5727 4453 008B E65A 7801 CCs of replies from mailing lists are requested.
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