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pam_fprintd: Guard against NULL pointer returned by finger_str_to_msg

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Otherwise the PAM module will crash trying to send an info message about
the selected print.
This commit is contained in:
Benjamin Berg
2020-12-05 11:36:41 +01:00
parent bf2236620e
commit 043fcaafec
1 changed files with 4 additions and 0 deletions
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4
pam/pam_fprintd.c
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@ -249,6 +249,10 @@ verify_finger_selected (sd_bus_message *m,
} }
msg = finger_str_to_msg(finger_name, data->driver, data->is_swipe); msg = finger_str_to_msg(finger_name, data->driver, data->is_swipe);
if (!msg) {
data->result = strdup ("Protocol error with fprintd!");
return 0;
}
if (debug) if (debug)
pam_syslog (data->pamh, LOG_DEBUG, "verify_finger_selected %s", msg); pam_syslog (data->pamh, LOG_DEBUG, "verify_finger_selected %s", msg);
send_info_msg (data->pamh, msg); send_info_msg (data->pamh, msg);