diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-13 13:47:51 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-30 09:41:24 +0200 |
| commit | 46aeeb2ac18acdaee65355d335b63fa2a49ac01b (patch) | |
| tree | 1254771703809abd60d727cd541b977eabdc6236 | |
| parent | a4887ea588e9bf515e43094bb09be21e13ee0908 (diff) | |
USB: wusbcore: fix NULL-deref at probe
commit 03ace948a4eb89d1cf51c06afdfc41ebca5fdb27 upstream.
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer or accessing memory beyond the endpoint array should a
malicious device lack the expected endpoints.
This specifically fixes the NULL-pointer dereference when probing HWA HC
devices.
Fixes: df3654236e31 ("wusb: add the Wire Adapter (WA) core")
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: David Vrabel <david.vrabel@csr.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/wusbcore/wa-hc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/wusbcore/wa-hc.c b/drivers/usb/wusbcore/wa-hc.c index 252c7bd9218a..d01496fd27fe 100644 --- a/drivers/usb/wusbcore/wa-hc.c +++ b/drivers/usb/wusbcore/wa-hc.c @@ -39,6 +39,9 @@ int wa_create(struct wahc *wa, struct usb_interface *iface, int result; struct device *dev = &iface->dev; + if (iface->cur_altsetting->desc.bNumEndpoints < 3) + return -ENODEV; + result = wa_rpipes_create(wa); if (result < 0) goto error_rpipes_create; |