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(parent: 24db1c5) | 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 11:14:32 +0000 (19:14 +0800)
commit0ab90ddba78a3fb34c34971ec36f2d51ba7827ec
tree679e241c25b8bd232ab1edb9a07ec513a145043ctree | snapshot
parent24db1c5a1c52c74b0218847c0a4cb1b40678cf84commit | 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
Domain: System / Kernel;