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Commit dab446f3 authored by Neeraj Upadhyay's avatar Neeraj Upadhyay Committed by Gerrit - the friendly Code Review server
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tty: Fix race between tty release and echo_delayed_work 



Fix potential race between tty release and echo_delayed_work,
which could result in use after free scenario for tty struct.

Change-Id: I1ea0f2a17d1131c686b3fe387a3576f3d037a3a5
Signed-off-by: default avatarNeeraj Upadhyay <neeraju@codeaurora.org>
parent eced530e

drivers/tty/tty_io.c

+4 −0
Original line number Diff line number Diff line
@@ -1663,6 +1663,10 @@ static void release_one_tty(struct work_struct *work) 


	put_pid(tty->pgrp);

	put_pid(tty->session);

#if defined(CONFIG_TTY_FLUSH_LOCAL_ECHO)

	if (tty->echo_delayed_work.work.func)

		cancel_delayed_work_sync(&tty->echo_delayed_work);

#endif

	free_tty_struct(tty);

}