[openssh-commits] [openssh] branch master updated (c4902e1a -> 7be4ac81)

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djm pushed a change to branch master
in repository openssh.

      from  c4902e1a  upstream: fix breakage of -W forwaring introduced in 1.554; reported by
       new  7be4ac81  upstream: restore blocking status on stdio fds before close

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commit 7be4ac813662f68e89f23c50de058a49aa32f7e4
Author: djm at openbsd.org <djm at openbsd.org>
Date:   Wed May 19 01:24:05 2021 +0000

    upstream: restore blocking status on stdio fds before close
    
    ssh(1) needs to set file descriptors to non-blocking mode to operate
    but it was not restoring the original state on exit. This could cause
    problems with fds shared with other programs via the shell, e.g.
    
    > $ cat > test.sh << _EOF
    > #!/bin/sh
    > {
    >         ssh -Fnone -oLogLevel=verbose ::1 hostname
    >         cat /usr/share/dict/words
    > } | sleep 10
    > _EOF
    > $ ./test.sh
    > Authenticated to ::1 ([::1]:22).
    > Transferred: sent 2352, received 2928 bytes, in 0.1 seconds
    > Bytes per second: sent 44338.9, received 55197.4
    > cat: stdout: Resource temporarily unavailable
    
    This restores the blocking status for fds 0,1,2 (stdio) before ssh(1)
    abandons/closes them.
    
    This was reported as bz3280 and GHPR246; ok dtucker@
    
    OpenBSD-Commit-ID: 8cc67346f05aa85a598bddf2383fcfcc3aae61ce

Summary of changes:
 channels.c   | 67 ++++++++++++++++++++++++++++++++++++++++++------------------
 channels.h   | 17 ++++++++++++---
 clientloop.c | 10 +--------
 mux.c        | 21 ++++---------------
 nchan.c      |  8 ++++----
 ssh.c        | 17 +++++----------
 6 files changed, 75 insertions(+), 65 deletions(-)

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