If the string buffers would have been overrun, set errno to EINVAL before returning. Then, have the callers report the errors to stderr or syslog as appropriate.
Cc: Sebastian Krahmer <[email protected]> Signed-off-by: Jeff Layton <[email protected]> --- cifscreds.c | 6 +++--- cifskey.c | 8 ++++++-- pam_cifscreds.c | 8 ++++---- 3 files changed, 13 insertions(+), 9 deletions(-) diff --git a/cifscreds.c b/cifscreds.c index 64d55b0cac0e..5d84c3c87873 100644 --- a/cifscreds.c +++ b/cifscreds.c @@ -220,8 +220,8 @@ static int cifscreds_add(struct cmdarg *arg) while (currentaddress) { key_serial_t key = key_add(currentaddress, arg->user, pass, arg->keytype); if (key <= 0) { - fprintf(stderr, "error: Add credential key for %s\n", - currentaddress); + fprintf(stderr, "error: Add credential key for %s: %s\n", + currentaddress, strerror(errno)); } else { if (keyctl(KEYCTL_SETPERM, key, CIFS_KEY_PERMS) < 0) { fprintf(stderr, "error: Setting permissons " @@ -422,7 +422,7 @@ static int cifscreds_update(struct cmdarg *arg) key_serial_t key = key_add(addrs[id], arg->user, pass, arg->keytype); if (key <= 0) fprintf(stderr, "error: Update credential key " - "for %s\n", addrs[id]); + "for %s: %s\n", addrs[id], strerror(errno)); } return EXIT_SUCCESS; diff --git a/cifskey.c b/cifskey.c index 4f01ed0e10bd..919540f549ad 100644 --- a/cifskey.c +++ b/cifskey.c @@ -47,13 +47,17 @@ key_add(const char *addr, const char *user, const char *pass, char keytype) char val[MOUNT_PASSWD_SIZE + MAX_USERNAME_SIZE + 2]; /* set key description */ - if (snprintf(desc, sizeof(desc), "%s:%c:%s", KEY_PREFIX, keytype, addr) >= (int)sizeof(desc)) + if (snprintf(desc, sizeof(desc), "%s:%c:%s", KEY_PREFIX, keytype, addr) >= (int)sizeof(desc)) { + errno = EINVAL; return -1; + } /* set payload contents */ len = snprintf(val, sizeof(val), "%s:%s", user, pass); - if (len >= (int)sizeof(val)) + if (len >= (int)sizeof(val)) { + errno = EINVAL; return -1; + } return add_key(CIFS_KEY_TYPE, desc, val, len + 1, DEST_KEYRING); } diff --git a/pam_cifscreds.c b/pam_cifscreds.c index fb23117953f0..3459105045b2 100644 --- a/pam_cifscreds.c +++ b/pam_cifscreds.c @@ -233,8 +233,8 @@ static int cifscreds_pam_add(pam_handle_t *ph, const char *user, const char *pas while (currentaddress) { key_serial_t key = key_add(currentaddress, user, password, keytype); if (key <= 0) { - pam_syslog(ph, LOG_ERR, "error: Add credential key for %s", - currentaddress); + pam_syslog(ph, LOG_ERR, "error: Add credential key for %s: %s", + currentaddress, strerror(errno)); } else { if ((args & ARG_DEBUG) == ARG_DEBUG) { pam_syslog(ph, LOG_DEBUG, "credential key for \\\\%s\\%s added", @@ -336,8 +336,8 @@ static int cifscreds_pam_update(pam_handle_t *ph, const char *user, const char * for (id = 0; id < count; id++) { key_serial_t key = key_add(currentaddress, user, password, keytype); if (key <= 0) { - pam_syslog(ph, LOG_ERR, "error: Update credential key for %s", - currentaddress); + pam_syslog(ph, LOG_ERR, "error: Update credential key for %s: %s", + currentaddress, strerror(errno)); } } -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
