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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: 1da177e4c3 ("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>
This commit is contained in:
Johan Hovold 2019-10-03 09:09:31 +02:00 committed by Greg Kroah-Hartman
parent 0aa7603820
commit 177238c3d4
1 changed files with 4 additions and 0 deletions
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4
drivers/usb/image/microtek.c
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@ -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 ) { if ( ep_out == -1 ) {
MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" ); MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );