USB: cdc-acm: fix potential null-pointer dereference on disconnect
commit98f637b2ec791ddec58d90f9706feac2c5011ed8
authorJohan Hovold <jhovold@gmail.com>
Tue, 22 Mar 2011 10:12:11 +0000 (22 11:12 +0100)
committerGreg Kroah-Hartman <gregkh@suse.de>
Sun, 27 Mar 2011 18:36:24 +0000 (27 11:36 -0700)
treeb8cfe9f77a7b090fc7ed88faf40af8d776b96601
parentc2bf2aa8c59305072aff51fbaa011079f9062c90
USB: cdc-acm: fix potential null-pointer dereference on disconnect

commit 7e7797e7f6f7bfab73fca02c65e40eaa5bb9000c upstream.

Fix potential null-pointer exception on disconnect introduced by commit
11ea859d64b69a747d6b060b9ed1520eab1161fe (USB: additional power savings
for cdc-acm devices that support remote wakeup).

Only access acm->dev after making sure it is non-null in control urb
completion handler.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/class/cdc-acm.c