diff options
| author | Johan Hovold <johan@kernel.org> | 2017-01-03 16:40:00 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-12 11:22:45 +0100 |
| commit | c6aa86222ec54154e00bf605e31ca111178440c0 (patch) | |
| tree | 2d7dca177c2385900d9723e822113f04c62e6978 | |
| parent | 4e106709060f2bc8f2b971e7915510d6de1e139a (diff) | |
USB: serial: pl2303: fix NULL-deref at open
commit 76ab439ed1b68778e9059c79ecc5d14de76c89a8 upstream.
Fix NULL-pointer dereference in open() should a type-0 or type-1 device
lack the expected endpoints:
Unable to handle kernel NULL pointer dereference at virtual address 00000030
...
PC is at pl2303_open+0x38/0xec [pl2303]
Note that a missing interrupt-in endpoint would have caused open() to
fail.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/serial/pl2303.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index ae682e4eeaef..46fca6b75846 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -220,9 +220,17 @@ static int pl2303_probe(struct usb_serial *serial, static int pl2303_startup(struct usb_serial *serial) { struct pl2303_serial_private *spriv; + unsigned char num_ports = serial->num_ports; enum pl2303_type type = TYPE_01; unsigned char *buf; + if (serial->num_bulk_in < num_ports || + serial->num_bulk_out < num_ports || + serial->num_interrupt_in < num_ports) { + dev_err(&serial->interface->dev, "missing endpoints\n"); + return -ENODEV; + } + spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); if (!spriv) return -ENOMEM; |