Re: linux-next: Tree for July 30

["Bartlomiej Zolnierkiewicz" <bzolnier@gmail.com>]

On Thu, Jul 31, 2008 at 4:07 PM, Dmitry Torokhov
<dmitry.torokhov@gmail.com> wrote:
> On Wed, Jul 30, 2008 at 11:10:29PM -0700, Andrew Morton wrote:
>> On Wed, 30 Jul 2008 17:06:35 +1000 Stephen Rothwell <sfr@canb.auug.org.au> wrote:
>>
>> > I have created today's linux-next tree at
>> > git://git.kernel.org/pub/scm/linux/kernel/git/sfr/linux-next.git
>>
>> The X server broke on my FC8 t61p thinkpad.  Mainline is OK.
>>
>> Various information is at http://userweb.kernel.org/~akpm/mo/
>>
>> I'm suspecting the input layer - my synaptics device seems to have
>> disappeared?  See http://userweb.kernel.org/~akpm/mo/Xorg-log-diff.txt
>>
>
> I think this patch should help with Synaptics:

Which unfortunately doesn't help all people running with older synaptics
user-space after commit 0571c5d20aca71c735222132b02aebddf593045c
("Input: expand keycode space").

Can't this be solved without breaking Xorg on newer kernels running
older synaptics?

> From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Subject: [PATCH] Fix crash on kernels with extended keymap space
>
> The len argument of EVIOCGBIT(ev,len) is the size of the receiving
> buffer in bytes, not maximim number of bits to retrieve.
>
> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
> ---
>  eventcomm.c |    6 +++---
>  1 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/eventcomm.c b/eventcomm.c
> index e3257cd..2d0a347 100644
> --- a/eventcomm.c
> +++ b/eventcomm.c
> @@ -89,7 +89,7 @@ event_query_is_touchpad(int fd)
>
>     /* Check for ABS_X, ABS_Y, ABS_PRESSURE and BTN_TOOL_FINGER */
>
> -    SYSCALL(ret = ioctl(fd, EVIOCGBIT(0, EV_MAX), evbits));
> +    SYSCALL(ret = ioctl(fd, EVIOCGBIT(0, sizeof(evbits)), evbits));
>     if (ret < 0)
>        return FALSE;
>     if (!TEST_BIT(EV_SYN, evbits) ||
> @@ -97,7 +97,7 @@ event_query_is_touchpad(int fd)
>        !TEST_BIT(EV_KEY, evbits))
>        return FALSE;
>
> -    SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_ABS, KEY_MAX), evbits));
> +    SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(evbits)), evbits));
>     if (ret < 0)
>        return FALSE;
>     if (!TEST_BIT(ABS_X, evbits) ||
> @@ -105,7 +105,7 @@ event_query_is_touchpad(int fd)
>        !TEST_BIT(ABS_PRESSURE, evbits))
>        return FALSE;
>
> -    SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_KEY, KEY_MAX), evbits));
> +    SYSCALL(ret = ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(evbits)), evbits));
>     if (ret < 0)
>        return FALSE;
>     if (!TEST_BIT(BTN_TOOL_FINGER, evbits))
> --
> 1.5.5.1