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authorLinus Torvalds <torvalds@linux-foundation.org>2018-10-04 11:06:13 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-10-11 19:50:00 +0200
commitc9a8e5fce009e3c601a43c49ea9dbcb25d1ffac5 (patch)
treec04d8a0702b70c3029d7957800d70a1db48de255 /drivers/tty
parent3bc3206e1c0f3f8891b544df02caae0e6d844f7d (diff)
tty: wipe buffer.
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>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/tty_buffer.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c
index 76151c002858..77070c2d1240 100644
--- a/drivers/tty/tty_buffer.c
+++ b/drivers/tty/tty_buffer.c
@@ -473,11 +473,15 @@ 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;
}
/**