4.9-stable review patch. If anyone has any objections, please let me know.
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From: Linus Torvalds torvalds@linux-foundation.org
commit c9a8e5fce009e3c601a43c49ea9dbcb25d1ffac5 upstream.
After we are done with the tty buffer, zero it out.
Reported-by: aszlig aszlig@nix.build Tested-by: Milan Broz gmazyland@gmail.com Tested-by: Daniel Zatovic daniel.zatovic@gmail.com Tested-by: aszlig aszlig@nix.build Cc: Willy Tarreau w@1wt.eu Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/tty/tty_buffer.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -458,6 +458,8 @@ int tty_ldisc_receive_buf(struct tty_ldi if (count && ld->ops->receive_buf) ld->ops->receive_buf(ld->tty, p, f, count); } + if (count > 0) + memset(p, 0, count); return count; } EXPORT_SYMBOL_GPL(tty_ldisc_receive_buf);