From: Johan Hovold johan@kernel.org
commit 177238c3d47d54b2ed8f0da7a4290db492f4a057 upstream.
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
--- drivers/usb/image/microtek.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/usb/image/microtek.c +++ b/drivers/usb/image/microtek.c @@ -721,6 +721,10 @@ static int mts_usb_probe(struct usb_inte
}
+ 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" );