[Bug 3772] New: scp "lost connection" failure

bugzilla-daemon at mindrot.org bugzilla-daemon at mindrot.org
Thu Jan 2 16:52:49 AEDT 2025


https://bugzilla.mindrot.org/show_bug.cgi?id=3772

            Bug ID: 3772
           Summary: scp "lost connection" failure
           Product: Portable OpenSSH
           Version: 9.9p1
          Hardware: Other
                OS: Windows 10
            Status: NEW
          Severity: major
          Priority: P5
         Component: scp
          Assignee: unassigned-bugs at mindrot.org
          Reporter: sponge_bob_128 at cox.net

Get random (but eventual) "lost connection" using scp (which uses
sftp/sftp-server) when transfering huge files via 1G ethernet.  No
problem if use "scp -O" (don't use sftp protocol) or piping through
ssh.  Will also happen with a local scp via loopback (localhost) so not
a network problem.  Running sshd with "-ddd" shows a "write failed" and
then the connection is terminated ("chan_shutdown_write").

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