diff options
| author | Johan Hovold <johan@kernel.org> | 2017-01-03 16:40:00 +0100 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2017-03-02 21:51:43 -0500 |
| commit | fb7a11218016343f03f855d7b213545fff62a38a (patch) | |
| tree | 1b55e669c0a0bbcf74be6785ea642dc4d744e9a8 /drivers | |
| parent | f61e65c87df647e51309b3e0b397b0fa7423ceeb (diff) | |
USB: serial: pl2303: fix NULL-deref at open
[ Upstream commit 76ab439ed1b68778e9059c79ecc5d14de76c89a8 ]
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")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'drivers')
| -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; |