1 files changed, 58 insertions, 0 deletions
diff --git a/sys-apps/systemd/files/249-fido2.patch b/sys-apps/systemd/files/249-fido2.patch
new file mode 100644
index 000000000000..bbfa4afb540e
--- /dev/null
+++ b/sys-apps/systemd/files/249-fido2.patch
@@ -0,0 +1,58 @@
+From b6aa89b0a399992c8ea762e6ec4f30cff90618f2 Mon Sep 17 00:00:00 2001
+From: pedro martelletto <pedro@yubico.com>
+Date: Wed, 8 Sep 2021 10:42:56 +0200
+Subject: [PATCH] explicitly close FIDO2 devices
+
+FIDO2 device access is serialised by libfido2 using flock().
+Therefore, make sure to close a FIDO2 device once we are done
+with it, or we risk opening it again at a later point and
+deadlocking. Fixes #20664.
+---
+ src/shared/libfido2-util.c | 2 ++
+ src/shared/libfido2-util.h | 5 ++++-
+ 2 files changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/src/shared/libfido2-util.c b/src/shared/libfido2-util.c
+index 12c644dcfcce..6d18178b68c9 100644
+--- a/src/shared/libfido2-util.c
++++ b/src/shared/libfido2-util.c
+@@ -58,6 +58,7 @@ bool (*sym_fido_dev_is_fido2)(const fido_dev_t *) = NULL;
+ int (*sym_fido_dev_make_cred)(fido_dev_t *, fido_cred_t *, const char *) = NULL;
+ fido_dev_t* (*sym_fido_dev_new)(void) = NULL;
+ int (*sym_fido_dev_open)(fido_dev_t *, const char *) = NULL;
++int (*sym_fido_dev_close)(fido_dev_t *) = NULL;
+ const char* (*sym_fido_strerr)(int) = NULL;
+ 
+ int dlopen_libfido2(void) {
+@@ -106,6 +107,7 @@ int dlopen_libfido2(void) {
+                         DLSYM_ARG(fido_dev_make_cred),
+                         DLSYM_ARG(fido_dev_new),
+                         DLSYM_ARG(fido_dev_open),
++                        DLSYM_ARG(fido_dev_close),
+                         DLSYM_ARG(fido_strerr));
+ }
+ 
+diff --git a/src/shared/libfido2-util.h b/src/shared/libfido2-util.h
+index 5640cca5e39b..4ebf8ab77509 100644
+--- a/src/shared/libfido2-util.h
++++ b/src/shared/libfido2-util.h
+@@ -60,6 +60,7 @@ extern bool (*sym_fido_dev_is_fido2)(const fido_dev_t *);
+ extern int (*sym_fido_dev_make_cred)(fido_dev_t *, fido_cred_t *, const char *);
+ extern fido_dev_t* (*sym_fido_dev_new)(void);
+ extern int (*sym_fido_dev_open)(fido_dev_t *, const char *);
++extern int (*sym_fido_dev_close)(fido_dev_t *);
+ extern const char* (*sym_fido_strerr)(int);
+ 
+ int dlopen_libfido2(void);
+@@ -75,8 +76,10 @@ static inline void fido_assert_free_wrapper(fido_assert_t **p) {
+ }
+ 
+ static inline void fido_dev_free_wrapper(fido_dev_t **p) {
+-        if (*p)
++        if (*p) {
++                sym_fido_dev_close(*p);
+                 sym_fido_dev_free(p);
++        }
+ }
+ 
+ static inline void fido_cred_free_wrapper(fido_cred_t **p) {