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tty: Fix unsafe vt paste_selection()

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Convert the tty_buffer_flush() exclusion mechanism to a
public interface - tty_buffer_lock/unlock_exclusive() - and use
the interface to safely write the paste selection to the line
discipline.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley
2013-06-15 09:36:15 -04:00
committed by Greg Kroah-Hartman
parent 47aa658a01
commit a7c8d58c79
4 changed files with 56 additions and 16 deletions
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3
include/linux/tty_flip.h
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@@ -32,4 +32,7 @@ static inline int tty_insert_flip_string(struct tty_port *port,
return tty_insert_flip_string_fixed_flag(port, chars, TTY_NORMAL, size);
}
extern void tty_buffer_lock_exclusive(struct tty_port *port);
extern void tty_buffer_unlock_exclusive(struct tty_port *port);
#endif /* _LINUX_TTY_FLIP_H */