[gdm: 1/2] pam-arch: Drop pam_faillock counting from fingerprint and smartcard

[Ray Strode <halfline src gnome org>]

commit 5e415bb1df01a3a6f42f30253e31f883a22b56dd
Author: Jan Alexander Steffens (heftig) <heftig archlinux org>
Date:   Tue Aug 31 21:51:46 2021 +0000

    pam-arch: Drop pam_faillock counting from fingerprint and smartcard
    
    As mentioned in an [fprintd issue comment][1], we need to make sure that
    the stack's error status is taken from the main auth module, i.e.
    pam_fprintd, otherwise GDM will not behave correctly.
    
    Still use pam_faillock preauth so that we test whether the account is
    locked, but don't use authfail/authsucc to log a failure/success so this
    stack doesn't participate in triggering the lock.
    
    Ideally we would check which return values we actually want to treat as
    a reason to lock the account (e.g. fingerprint mismatch) and which are
    neutral (e.g. no fingerprints enrolled), but that's much more effort.
    
    Should fix [FS#71750][2].
    
    [1]: https://gitlab.freedesktop.org/libfprint/fprintd/-/issues/112#note_1016191
    [2]: https://bugs.archlinux.org/task/71750

 data/pam-arch/gdm-fingerprint.pam | 10 ++--------
 data/pam-arch/gdm-smartcard.pam   | 10 ++--------
 2 files changed, 4 insertions(+), 16 deletions(-)
---
diff --git a/data/pam-arch/gdm-fingerprint.pam b/data/pam-arch/gdm-fingerprint.pam
index cc660d9a9..2aaf9f6c8 100644
--- a/data/pam-arch/gdm-fingerprint.pam
+++ b/data/pam-arch/gdm-fingerprint.pam
@@ -2,16 +2,10 @@
 
 auth       required                    pam_shells.so
 auth       requisite                   pam_nologin.so
-auth       required                    pam_faillock.so      preauth
-# Optionally use requisite above if you do not want to prompt for the fingerprint
-# on locked accounts.
-auth       [success=1 default=ignore]  pam_fprintd.so
-auth       [default=die]               pam_faillock.so      authfail
+auth       requisite                   pam_faillock.so      preauth
+auth       required                    pam_fprintd.so
 auth       optional                    pam_permit.so
 auth       required                    pam_env.so
-auth       required                    pam_faillock.so      authsucc
-# If you drop the above call to pam_faillock.so the lock will be done also
-# on non-consecutive authentication failures.
 auth       [success=ok default=1]      pam_gdm.so
 auth       optional                    pam_gnome_keyring.so
 
diff --git a/data/pam-arch/gdm-smartcard.pam b/data/pam-arch/gdm-smartcard.pam
index e6ec12994..6d7333bf4 100644
--- a/data/pam-arch/gdm-smartcard.pam
+++ b/data/pam-arch/gdm-smartcard.pam
@@ -2,16 +2,10 @@
 
 auth       required                    pam_shells.so
 auth       requisite                   pam_nologin.so
-auth       required                    pam_faillock.so      preauth
-# Optionally use requisite above if you do not want to prompt for the smartcard
-# on locked accounts.
-auth       [success=1 default=ignore]  pam_pkcs11.so        wait_for_card card_only
-auth       [default=die]               pam_faillock.so      authfail
+auth       requisite                   pam_faillock.so      preauth
+auth       required                    pam_pkcs11.so        wait_for_card card_only
 auth       optional                    pam_permit.so
 auth       required                    pam_env.so
-auth       required                    pam_faillock.so      authsucc
-# If you drop the above call to pam_faillock.so the lock will be done also
-# on non-consecutive authentication failures.
 auth       [success=ok default=1]      pam_gdm.so
 auth       optional                    pam_gnome_keyring.so