This is a note to let you know that I've just added the patch titled
tty: Fix SIGTTOU not sent with tcflush()
to the 3.11-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tty-fix-sigttou-not-sent-with-tcflush.patch
and it can be found in the queue-3.11 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5cec7bf699c61d14f0538345076480bb8c8ebfbb Mon Sep 17 00:00:00 2001
From: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
Date: Wed, 25 Sep 2013 20:13:04 -0400
Subject: tty: Fix SIGTTOU not sent with tcflush()
From: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
commit 5cec7bf699c61d14f0538345076480bb8c8ebfbb upstream.
Commit 'e7f3880cd9b98c5bf9391ae7acdec82b75403776'
tty: Fix recursive deadlock in tty_perform_flush()
introduced a regression where tcflush() does not generate
SIGTTOU for background process groups.
Make sure ioctl(TCFLSH) calls tty_check_change() when
invoked from the line discipline.
Reported-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/tty_ioctl.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -1201,6 +1201,9 @@ int n_tty_ioctl_helper(struct tty_struct
}
return 0;
case TCFLSH:
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
return __tty_perform_flush(tty, arg);
default:
/* Try the mode commands */
Patches currently in stable-queue which might be from peter@xxxxxxxxxxxxxxxxxx are
queue-3.11/tty-fix-sigttou-not-sent-with-tcflush.patch
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