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tty: wipe buffer.

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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>
This commit is contained in:
Linus Torvalds 2018-10-04 11:06:13 -07:00 committed by Greg Kroah-Hartman
parent 674004e6c4
commit 3540460e92
1 changed files with 2 additions and 0 deletions
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2
drivers/tty/tty_buffer.c
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@ -458,6 +458,8 @@ int tty_ldisc_receive_buf(struct tty_ldisc *ld, unsigned char *p,
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);