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| author | Dmitry Torokhov <dtor@insightbb.com> | 2007-06-29 09:06:35 +0400 |
|---|---|---|
| committer | Dmitry Torokhov <dtor@insightbb.com> | 2007-06-29 09:06:35 +0400 |
| commit | 33143ea1a34d12699e6aa222ba124498abcfe4d1 (patch) | |
| tree | 5f104ff42e9c964bebd508e9354d5a6468628edd /drivers/input/serio/serio.c | |
| parent | 9f7a60d6e47a70957e5f6676cfe8c83956b08aa6 (diff) | |
| download | linux-33143ea1a34d12699e6aa222ba124498abcfe4d1.tar.xz | |
Input: serio - take drv_mutex in serio_cleanup()
We need to take serio->drv_mutex in serio_cleanup() to prevent the
function from being called while driver is in the middle of attaching
to a serio port. Such situation can happen with i8042 and atkbd drivers
if user rapidly presses Ctrl-Alt-Del during system startup, and leads
to kernel oops.
Reported-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/serio/serio.c')
| -rw-r--r-- | drivers/input/serio/serio.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c index 5895202b972c..a8f3bc1dff22 100644 --- a/drivers/input/serio/serio.c +++ b/drivers/input/serio/serio.c @@ -769,8 +769,10 @@ static int serio_driver_remove(struct device *dev) static void serio_cleanup(struct serio *serio) { + mutex_lock(&serio->drv_mutex); if (serio->drv && serio->drv->cleanup) serio->drv->cleanup(serio); + mutex_unlock(&serio->drv_mutex); } static void serio_shutdown(struct device *dev) |