On Wed, 28 August 2013 Jiri Kosina <[email protected]> wrote: > From: Kees Cook <[email protected]> > > A HID device could send a malicious output report that would cause the > picolcd HID driver to trigger a NULL dereference during attr file writing. > > CVE-2013-2899 > > Signed-off-by: Kees Cook <[email protected]> > Cc: [email protected] > --- > drivers/hid/hid-picolcd_core.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c > index b48092d..72bba1e 100644 > --- a/drivers/hid/hid-picolcd_core.c > +++ b/drivers/hid/hid-picolcd_core.c > @@ -290,7 +290,7 @@ static ssize_t picolcd_operation_mode_store(struct device > *dev, > buf += 10; > cnt -= 10; > } > - if (!report) > + if (!report || report->maxfield < 1) > return -EINVAL; > > while (cnt > 0 && (buf[cnt-1] == '\n' || buf[cnt-1] == '\r'))
I will check tomorrow or Friday evening what the documentation I have says for this report and test, might be a report->maxfield != 1 would be even better suited. Too late today for looking into it. Bruno -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
