4.14-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 | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -467,11 +467,15 @@ receive_buf(struct tty_port *port, struc { 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; }
/**