Hi, On Mon, Mar 22, 2021 at 1:16 PM Luiz Augusto von Dentz <luiz.dentz@xxxxxxxxx> wrote: > > From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx> > > If UHID_GET_REPORT is received but a report cannot be found, etc, the > would pass bt_hog as user_data instead of report to get_report_cb > leading to a crash. > > Fixes https://github.com/bluez/bluez/issues/112 > --- > profiles/input/hog-lib.c | 49 ++++++++++++++++++++++++---------------- > 1 file changed, 30 insertions(+), 19 deletions(-) > > diff --git a/profiles/input/hog-lib.c b/profiles/input/hog-lib.c > index 6ac14e401..e5e3d3e7f 100644 > --- a/profiles/input/hog-lib.c > +++ b/profiles/input/hog-lib.c > @@ -786,11 +786,9 @@ fail: > set_report_cb(err, NULL, 0, hog); > } > > -static void get_report_cb(guint8 status, const guint8 *pdu, guint16 len, > - gpointer user_data) > +static void report_reply(struct bt_hog *hog, uint8_t status, uint8_t id, > + uint16_t len, const uint8_t *data) > { > - struct report *report = user_data; > - struct bt_hog *hog = report->hog; > struct uhid_event rsp; > int err; > > @@ -800,6 +798,31 @@ static void get_report_cb(guint8 status, const guint8 *pdu, guint16 len, > rsp.type = UHID_GET_REPORT_REPLY; > rsp.u.get_report_reply.id = hog->getrep_id; > > + if (status) > + goto done; > + > + if (hog->has_report_id && len > 0) { > + rsp.u.get_report_reply.size = len + 1; > + rsp.u.get_report_reply.data[0] = id; > + memcpy(&rsp.u.get_report_reply.data[1], data, len); > + } else { > + rsp.u.get_report_reply.size = len; > + memcpy(rsp.u.get_report_reply.data, data, len); > + } > + > +done: > + rsp.u.get_report_reply.err = status; > + err = bt_uhid_send(hog->uhid, &rsp); > + if (err < 0) > + error("bt_uhid_send: %s", strerror(-err)); > +} > + > +static void get_report_cb(guint8 status, const guint8 *pdu, guint16 len, > + gpointer user_data) > +{ > + struct report *report = user_data; > + struct bt_hog *hog = report->hog; > + > if (status != 0) { > error("Error reading Report value: %s", att_ecode2str(status)); > goto exit; > @@ -820,20 +843,8 @@ static void get_report_cb(guint8 status, const guint8 *pdu, guint16 len, > --len; > ++pdu; > > - if (hog->has_report_id && len > 0) { > - rsp.u.get_report_reply.size = len + 1; > - rsp.u.get_report_reply.data[0] = report->id; > - memcpy(&rsp.u.get_report_reply.data[1], pdu, len); > - } else { > - rsp.u.get_report_reply.size = len; > - memcpy(rsp.u.get_report_reply.data, pdu, len); > - } > - > exit: > - rsp.u.get_report_reply.err = status; > - err = bt_uhid_send(hog->uhid, &rsp); > - if (err < 0) > - error("bt_uhid_send: %s", strerror(-err)); > + report_reply(hog, status, report->id, len, pdu); > } > > static void get_report(struct uhid_event *ev, void *user_data) > @@ -868,8 +879,8 @@ static void get_report(struct uhid_event *ev, void *user_data) > return; > > fail: > - /* cancel the request on failure */ > - get_report_cb(err, NULL, 0, hog); > + /* reply with an error on failure */ > + report_reply(hog, err, 0, 0, NULL); > } > > static bool get_descriptor_item_info(uint8_t *buf, ssize_t blen, ssize_t *len, > -- > 2.30.2 Applied. -- Luiz Augusto von Dentz
