n_tty: Fix unsafe reference to "other" ldisc

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commit 6d27a63caa upstream.

Although n_tty_check_unthrottle() has a valid ldisc reference (since
the tty core gets the ldisc ref in tty_read() before calling the line
discipline read() method), it does not have a valid ldisc reference to
the "other" pty of a pty pair. Since getting an ldisc reference for
tty->link essentially open-codes tty_wakeup(), just replace with the
equivalent tty_wakeup().

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Peter Hurley 2016-01-10 22:40:56 -08:00 • committed by Greg Kroah-Hartman

parent 46f0b319cd

commit cccd9546e9

1 changed files with 2 additions and 5 deletions

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drivers/tty/n_tty.c

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