| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 79/86] tty: wipe buffer. | Date | Thu, 29 Nov 2018 15:12:44 +0100 |
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4.4-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 @@ -454,6 +454,8 @@ receive_buf(struct tty_struct *tty, stru if (count && disc->ops->receive_buf) disc->ops->receive_buf(tty, p, f, count); } + if (count > 0) + memset(p, 0, count); return count; }
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