git.ipfire.org Git - thirdparty/kernel/stable.git/commit

author	Johan Hovold <johan@kernel.org>
	Mon, 6 Mar 2017 16:36:41 +0000 (17:36 +0100)
committer	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
	Sat, 18 Mar 2017 11:18:42 +0000 (19:18 +0800)
commit	dc944b117e6c84ca95449bbbab089dfa07d703e6
tree	8f5c22f7d935e6dfc3a1cf881e0d2eb56b6cb07d	tree
parent	a062cb39594667bd3953f71cbcf7e0b276998f56	commit \| diff

USB: serial: safe_serial: fix information leak in completion handler

commit 8c76d7cd520ebffc1ea9ea0850d87a224a50c7f2 upstream.

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")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>