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explicitly close FIDO2 devices

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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.
This commit is contained in:
pedro martelletto 2021-09-08 10:42:56 +02:00 committed by Luca Boccassi
parent afd4814651
commit b6aa89b0a3
2 changed files with 6 additions and 1 deletions
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2
src/shared/libfido2-util.c
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@ -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));
}

5
src/shared/libfido2-util.h
View File

@ -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) {