From: Johan Hovold johan@kernel.org
commit 1d427be4a39defadda6dd8f4659bc17f7591740f upstream.
Make sure to check for short transfers when retrieving the version information at probe to avoid leaking uninitialised slab data when logging it.
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/20190919083039.30898-2-johan@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/usb/misc/legousbtower.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/usb/misc/legousbtower.c +++ b/drivers/usb/misc/legousbtower.c @@ -923,8 +923,10 @@ static int tower_probe (struct usb_inter get_version_reply, sizeof(*get_version_reply), 1000); - if (result < 0) { - dev_err(idev, "LEGO USB Tower get version control request failed\n"); + if (result < sizeof(*get_version_reply)) { + if (result >= 0) + result = -EIO; + dev_err(idev, "get version request failed: %d\n", result); retval = result; goto error; }