lkml.org 
[lkml]   [2018]   [Nov]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4.19 101/110] tty: wipe buffer.
Date
4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

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
@@ -468,11 +468,15 @@ 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;
}

/**

\
 
 \ /
  Last update: 2018-11-29 15:34    [W:0.280 / U:2.108 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site