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(parent: cf09c7d) | patch
USB: serial: safe_serial: fix information leak in completion handler
authorJohan Hovold <johan@kernel.org>
Mon, 6 Mar 2017 16:36:41 +0000 (17:36 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 18 Mar 2017 11:09:57 +0000 (19:09 +0800)
commit3cdc94638746eab168accf0f808a83e59fe1ca67
tree522dcbc3a533345a0650e029eb52e7c75f7d2324tree | snapshot
parentcf09c7d60ccc8189cd8e313ae83b8d377fa67359commit | 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>
drivers/usb/serial/safe_serial.c diff | blob | history
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