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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 a956132ac0
commit 5e063b6416
1 changed files with 5 additions and 1 deletions
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6
drivers/tty/tty_buffer.c
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@ -467,11 +467,15 @@ receive_buf(struct tty_port *port, struct tty_buffer *head, int count)
{
unsigned char *p = char_buf_ptr(head, head->read);
char *f = NULL;
int n;
if (~head->flags & TTYB_NORMAL)
f = flag_buf_ptr(head, head->read);
return port->client_ops->receive_buf(port, p, f, count);
n = port->client_ops->receive_buf(port, p, f, count);
if (n > 0)
memset(p, 0, n);
return n;
}
/**