Commits
Johan Hovold committed 394e5f4a60c
USB: serial: safe_serial: fix information leak in completion handler
[ Upstream commit 8c76d7cd520ebffc1ea9ea0850d87a224a50c7f2 ]
Add missing sanity check to the bulk-in completion handler to avoid an
integer underflow that could be triggered by a malicious device.
This avoids leaking up to 56 bytes from after the URB transfer buffer to
user space.
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>