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(parent: d415ccd) | patch
serdev: ttyport: fix NULL-deref on hangup
authorJohan Hovold <johan@kernel.org>
Fri, 3 Nov 2017 14:30:55 +0000 (15:30 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 14 Dec 2017 08:52:44 +0000 (09:52 +0100)
commit5a3da8bd93c78b6a4aed19c83cb8f493dfc4dfef
treea73b11cdaeaf7d52524c42caa1f4082fa4cdf4bdtree | snapshot (tar.gz zip)
parentd415ccdd0be1a745904a7b12b87437463aa35a8dcommit | diff
serdev: ttyport: fix NULL-deref on hangup

commit 8bcd4e6a8decac251d55c4377e2e67f052777ce0 upstream.

Make sure to use a properly refcounted tty_struct in write_wake up to
avoid dereferencing a NULL-pointer when a port is being hung up.

Fixes: bed35c6dfa6a ("serdev: add a tty port controller driver")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/serdev/serdev-ttyport.c diff | blob | blame | history