diff options
| author | Johan Hovold <johan@kernel.org> | 2016-01-12 12:05:20 +0100 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-02-15 15:45:20 -0500 |
| commit | 5c9cad0a726131934408f3a9e66fc381204a9ba2 (patch) | |
| tree | ff070557312f7d434228459723834e041e47f22e /drivers/usb | |
| parent | 1c47f2c5aff5993647468e8476bb6bbc6e09a939 (diff) | |
| download | linux-stable-5c9cad0a726131934408f3a9e66fc381204a9ba2.tar.gz | |
USB: visor: fix null-deref at probe
[ Upstream commit cac9b50b0d75a1d50d6c056ff65c005f3224c8e0 ]
Fix null-pointer dereference at probe should a (malicious) Treo device
lack the expected endpoints.
Specifically, the Treo port-setup hack was dereferencing the bulk-in and
interrupt-in urbs without first making sure they had been allocated by
core.
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 <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/visor.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c index 60afb39eb73c..c53fbb3e0b8c 100644 --- a/drivers/usb/serial/visor.c +++ b/drivers/usb/serial/visor.c @@ -544,6 +544,11 @@ static int treo_attach(struct usb_serial *serial) (serial->num_interrupt_in == 0)) return 0; + if (serial->num_bulk_in < 2 || serial->num_interrupt_in < 2) { + dev_err(&serial->interface->dev, "missing endpoints\n"); + return -ENODEV; + } + /* * It appears that Treos and Kyoceras want to use the * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint, |