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Stop logging EOFs and exit(1)s in ssh handler (#20476) (#20529)

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Backport #20476

The code in modules/ssh/ssh.go:sessionHandler() currently cause an error to be
logged if `gitea serv` exits with a exit(1). This logging is useless because the
accompanying stderr is not provided and in any case the exit(1) is most likely due
to permissions errors.

Further it then causes the EOF to be logged - even though this is not helpful.

This PR simply checks the errors returned and stops logging them.

In the case of misconfigurations causing `gitea serv` to fail with exit(1)
the current logging is not helpful at determining this and users should simply
review the message passed over the ssh connection.

Fix #20473

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2022-07-29 01:10:42 +01:00 committed by GitHub
parent ae86a0bc9f
commit 6986e56791
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 7 additions and 2 deletions
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7
modules/ssh/ssh.go
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@ -11,6 +11,7 @@ import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
"io"
"net"
@ -142,10 +143,14 @@ func sessionHandler(session ssh.Session) {
// Wait for the command to exit and log any errors we get
err = cmd.Wait()
if err != nil {
// Cannot use errors.Is here because ExitError doesn't implement Is
// Thus errors.Is will do equality test NOT type comparison
if _, ok := err.(*exec.ExitError); !ok {
log.Error("SSH: Wait: %v", err)
}
}
if err := session.Exit(getExitStatusFromError(err)); err != nil {
if err := session.Exit(getExitStatusFromError(err)); err != nil && !errors.Is(err, io.EOF) {
log.Error("Session failed to exit. %s", err)
}
}