]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
n_tty: signal and flush atomically
authorPeter Hurley <peter@hurleysoftware.com>
Sat, 27 Jun 2015 13:21:32 +0000 (09:21 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 23 Jul 2015 22:05:53 +0000 (15:05 -0700)
commit3b19e032295647b7be2aa3be62510db4aaeda759
tree42d49b560e263749594dd73e5b149460bdad3dfd
parent52721d9d3334c1cb1f76219a161084094ec634dc
n_tty: signal and flush atomically

When handling signalling char, claim the termios write lock before
signalling waiting readers and writers to prevent further i/o
before flushing the echo and output buffers. This prevents a
userspace signal handler which may output from racing the terminal
flush.

Reference: Bugzilla #99351 ("Output truncated in ssh session after...")
Fixes: commit d2b6f44779d3 ("n_tty: Fix signal handling flushes")
Reported-by: Filipe Brandenburger <filbranden@google.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/n_tty.c