Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.19 120/149] USB: serial: whiteheat: fix potential slab corruption | Date | Mon, 4 Nov 2019 22:45:13 +0100 |
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From: Johan Hovold <johan@kernel.org>
commit 1251dab9e0a2c4d0d2d48370ba5baa095a5e8774 upstream.
Fix a user-controlled slab buffer overflow due to a missing sanity check on the bulk-out transfer buffer used for control requests.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org> Link: https://lore.kernel.org/r/20191029102354.2733-2-johan@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/usb/serial/whiteheat.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/usb/serial/whiteheat.c +++ b/drivers/usb/serial/whiteheat.c @@ -571,6 +571,10 @@ static int firm_send_command(struct usb_ command_port = port->serial->port[COMMAND_PORT]; command_info = usb_get_serial_port_data(command_port); + + if (command_port->bulk_out_size < datasize + 1) + return -EIO; + mutex_lock(&command_info->mutex); command_info->command_finished = false;
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