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diff -up openssh-8.0p1/auth-pam.c.preserve-pam-errors openssh-8.0p1/auth-pam.c
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--- openssh-8.0p1/auth-pam.c.preserve-pam-errors 2021-03-31 17:03:15.618592347 +0200
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+++ openssh-8.0p1/auth-pam.c 2021-03-31 17:06:58.115220014 +0200
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@@ -511,7 +511,11 @@ sshpam_thread(void *ctxtp)
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goto auth_fail;
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if (!do_pam_account()) {
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- sshpam_err = PAM_ACCT_EXPIRED;
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+ /* Preserve PAM_PERM_DENIED and PAM_USER_UNKNOWN.
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+ * Backward compatibility for other errors. */
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+ if (sshpam_err != PAM_PERM_DENIED
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+ && sshpam_err != PAM_USER_UNKNOWN)
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+ sshpam_err = PAM_ACCT_EXPIRED;
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goto auth_fail;
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}
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if (sshpam_authctxt->force_pwchange) {
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@@ -568,8 +572,10 @@ sshpam_thread(void *ctxtp)
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pam_strerror(sshpam_handle, sshpam_err))) != 0)
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fatal("%s: buffer error: %s", __func__, ssh_err(r));
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/* XXX - can't do much about an error here */
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- if (sshpam_err == PAM_ACCT_EXPIRED)
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- ssh_msg_send(ctxt->pam_csock, PAM_ACCT_EXPIRED, buffer);
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+ if (sshpam_err == PAM_PERM_DENIED
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+ || sshpam_err == PAM_USER_UNKNOWN
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+ || sshpam_err == PAM_ACCT_EXPIRED)
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+ ssh_msg_send(ctxt->pam_csock, sshpam_err, buffer);
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else if (sshpam_maxtries_reached)
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ssh_msg_send(ctxt->pam_csock, PAM_MAXTRIES, buffer);
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else
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@@ -856,10 +862,12 @@ sshpam_query(void *ctx, char **name, cha
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plen++;
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free(msg);
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break;
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+ case PAM_USER_UNKNOWN:
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+ case PAM_PERM_DENIED:
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case PAM_ACCT_EXPIRED:
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+ sshpam_account_status = 0;
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+ /* FALLTHROUGH */
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case PAM_MAXTRIES:
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- if (type == PAM_ACCT_EXPIRED)
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- sshpam_account_status = 0;
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if (type == PAM_MAXTRIES)
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sshpam_set_maxtries_reached(1);
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/* FALLTHROUGH */
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