[3.16.y-ckt stable] Patch "tty: Fix GPF in flush_to_ldisc(), part 2" has been added to the 3.16.y-ckt tree
Luis Henriques
luis.henriques at canonical.com
Mon Apr 11 17:21:12 UTC 2016
This is a note to let you know that I have just added a patch titled
tty: Fix GPF in flush_to_ldisc(), part 2
to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue
This patch is scheduled to be released in version 3.16.7-ckt27.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Luis
---8<------------------------------------------------------------
>From ad65e2997553b56be5ad7f1e6db8c1b337bfd6d5 Mon Sep 17 00:00:00 2001
From: Peter Hurley <peter at hurleysoftware.com>
Date: Sun, 10 Jan 2016 20:36:12 -0800
Subject: tty: Fix GPF in flush_to_ldisc(), part 2
commit f33798deecbd59a2955f40ac0ae2bc7dff54c069 upstream.
commit 9ce119f318ba ("tty: Fix GPF in flush_to_ldisc()") fixed a
GPF caused by a line discipline which does not define a receive_buf()
method.
However, the vt driver (and speakup driver also) pushes selection
data directly to the line discipline receive_buf() method via
tty_ldisc_receive_buf(). Fix the same problem in tty_ldisc_receive_buf().
Signed-off-by: Peter Hurley <peter at hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
include/linux/tty.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 1c3316a47d7e..1d02392fa3bd 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -569,7 +569,7 @@ static inline int tty_ldisc_receive_buf(struct tty_ldisc *ld, unsigned char *p,
count = ld->ops->receive_buf2(ld->tty, p, f, count);
else {
count = min_t(int, count, ld->tty->receive_room);
- if (count)
+ if (count && ld->ops->receive_buf)
ld->ops->receive_buf(ld->tty, p, f, count);
}
return count;
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