diff options
| author | Johan Hovold <johan@kernel.org> | 2019-10-03 09:09:31 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-04 11:02:58 +0200 |
| commit | 177238c3d47d54b2ed8f0da7a4290db492f4a057 (patch) | |
| tree | a4dbf7a531d7f37b735d0f6f3afd809bcbed50bd | |
| parent | 0aa760382040cc3d70b538ade56ba9c37ed8b702 (diff) | |
USB: microtek: fix info-leak at probe
Add missing bulk-in endpoint sanity check to prevent uninitialised stack
data from being reported to the system log and used as endpoint
addresses.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Reported-by: syzbot+5630ca7c3b2be5c9da5e@syzkaller.appspotmail.com
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Oliver Neukum <oneukum@suse.com>
Link: https://lore.kernel.org/r/20191003070931.17009-1-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/image/microtek.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/image/microtek.c b/drivers/usb/image/microtek.c index 0a57c2cc8e5a..7a6b122c833f 100644 --- a/drivers/usb/image/microtek.c +++ b/drivers/usb/image/microtek.c @@ -716,6 +716,10 @@ static int mts_usb_probe(struct usb_interface *intf, } + if (ep_in_current != &ep_in_set[2]) { + MTS_WARNING("couldn't find two input bulk endpoints. Bailing out.\n"); + return -ENODEV; + } if ( ep_out == -1 ) { MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" ); |