https://bugzilla.mindrot.org/show_bug.cgi?id=3816
Bug ID: 3816
Summary: regression: valid_hostname() refuses hostname with
comma
Product: Portable OpenSSH
Version: 10.0p1
Hardware: Other
OS: Linux
Status: NEW
Severity: enhancement
Priority: P5
Component: scp
Assignee: [email protected]
Reporter: [email protected]
Since 487cf4c18c123b66c1f3f733398cd37e6b2ab6ab, hostname with comma is
refused.
Hostname with comma may be used by scp, e.g.
scp -v vsock,1:/etc/machine-id /tmp
The commit breaks a test case in systemd:
https://github.com/systemd/systemd/blob/defd5060d69ba31c1815e7d5427bde93a3db88c0/test/units/TEST-74-AUX-UTILS.ssh.sh#L65-L71
With openssh 10.0p1, the test case failed with the following:
```
[ 78.014567] TEST-74-AUX-UTILS.sh[2634]: + command -v scp
[ 78.016996] TEST-74-AUX-UTILS.sh[2694]: ++ mktemp -u
[ 78.019724] TEST-74-AUX-UTILS.sh[2634]: +
OUT_FILE=/tmp/tmp.e3WBq62ziC
[ 78.021470] TEST-74-AUX-UTILS.sh[2634]: + scp -o
StrictHostKeyChecking=no -v -i /tmp/tmp.L5BYceUUfs
vsock,1:/etc/machine-id /tmp/tmp.e3WBq62ziC
[ 78.023570] TEST-74-AUX-UTILS.sh[2695]: Executing: program
/usr/bin/ssh host vsock,1, user (unspecified), command sftp
[ 78.031887] TEST-74-AUX-UTILS.sh[2697]: hostname contains invalid
characters
[FAILED] Failed to start TEST-74-AUX-UTILS.service.
[ 78.035067] TEST-74-AUX-UTILS.sh[2695]: scp: Connection closed
[ 78.037831] TEST-74-AUX-UTILS.sh[307]: + echo 'Subtest
/usr/lib/systemd/tests/testdata/units/TEST-74-AUX-UTILS.ssh.sh failed'
[ 78.038431] TEST-74-AUX-UTILS.sh[307]: Subtest
/usr/lib/systemd/tests/testdata/units/TEST-74-AUX-UTILS.ssh.sh failed
[ 78.039110] TEST-74-AUX-UTILS.sh[307]: + return 1
```
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