[Bug 3846] New: Connect failure with large sshd_config

bugzilla-daemon at mindrot.org bugzilla-daemon at mindrot.org
Thu Jul 3 21:51:23 AEST 2025


https://bugzilla.mindrot.org/show_bug.cgi?id=3846

            Bug ID: 3846
           Summary: Connect failure with large sshd_config
           Product: Portable OpenSSH
           Version: 10.0p2
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: sshd
          Assignee: unassigned-bugs at mindrot.org
          Reporter: dbelyavs at redhat.com

I use this test script 

$ cat regress/connect_large_sshd.sh 
```
#       $OpenBSD: connect.sh,v 1.8 2020/01/25 02:57:53 dtucker Exp $
#       Placed in the Public Domain.

tid="simple connect"

printf 'Match Group GRP\nChrootDirectory /some/path/for/group/\n%.s'
{1..10000} >> $OBJ/sshd_config
#cat $OBJ/sshd_config
start_sshd

trace "direct connect with large sshd_config"
${SSH} -F $OBJ/ssh_config somehost true
if [ $? -ne 0 ]; then
        fail "ssh direct connect with large sshd_config failed"
fi
```
Command 

make tests LTESTS=connect_large_sshd INTEROP_TESTS="" SKIP_UNIT=1

fails with the current master and OpenSSH-10.0p1/p2 but succeeds with
9.9p2

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