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| author | Brian Bloniarz <brian.bloniarz@gmail.com> | 2016-03-06 21:16:30 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-01 20:22:54 (GMT) |
| commit | 0f40fbbcc34e093255a2b2d70b6b0fb48c3f39aa (patch) | |
| tree | edfa996be5ce50cd79dcfdfa96bb9d8490418660 /sound/soc/tegra/tegra_rt5677.c | |
| parent | d11df61853f1d45035b7f5a6702c9b48d5f09a49 (diff) | |
| download | linux-0f40fbbcc34e093255a2b2d70b6b0fb48c3f39aa.tar.xz | |
Fix OpenSSH pty regression on close
OpenSSH expects the (non-blocking) read() of pty master to return
EAGAIN only if it has received all of the slave-side output after
it has received SIGCHLD. This used to work on pre-3.12 kernels.
This fix effectively forces non-blocking read() and poll() to
block for parallel i/o to complete for all ttys. It also unwinds
these changes:
1) f8747d4a466ab2cafe56112c51b3379f9fdb7a12
tty: Fix pty master read() after slave closes
2) 52bce7f8d4fc633c9a9d0646eef58ba6ae9a3b73
pty, n_tty: Simplify input processing on final close
3) 1a48632ffed61352a7810ce089dc5a8bcd505a60
pty: Fix input race when closing
Inspired by analysis and patch from Marc Aurele La France <tsi@tuyoix.net>
Reported-by: Volth <openssh@volth.com>
Reported-by: Marc Aurele La France <tsi@tuyoix.net>
BugLink: https://bugzilla.mindrot.org/show_bug.cgi?id=52
BugLink: https://bugzilla.mindrot.org/show_bug.cgi?id=2492
Signed-off-by: Brian Bloniarz <brian.bloniarz@gmail.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound/soc/tegra/tegra_rt5677.c')
0 files changed, 0 insertions, 0 deletions