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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>
Tue, 28 Nov 2017 15:00:50 +0000 (16:00 +0100)
commit8bcd4e6a8decac251d55c4377e2e67f052777ce0
treee9ecd5cb20a5a37a2f255d8d51622be7eec2b5detree
parentfd00cf81a9a84776ba58e56bd042c726dcf75cf3commit | diff
serdev: ttyport: fix NULL-deref on hangup

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")
Cc: stable <stable@vger.kernel.org> # 4.11
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 | history
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