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| author | Dongliang Mu <mudongliangabcd@gmail.com> | 2021-06-25 08:59:04 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-07-22 09:22:45 +0300 |
| commit | 797c061ad715a9a1480eb73f44b6939fbe3209ed (patch) | |
| tree | b69ee91fb2889f03fd6fe84671138625d8b737b2 | |
| parent | c5453769f77ce19a5b03f1f49946fd3f8a374009 (diff) | |
| download | linux-797c061ad715a9a1480eb73f44b6939fbe3209ed.tar.xz | |
media: dvb-usb: fix uninit-value in vp702x_read_mac_addr
If vp702x_usb_in_op fails, the mac address is not initialized.
And vp702x_read_mac_addr does not handle this failure, which leads to
the uninit-value in dvb_usb_adapter_dvb_init.
Fix this by handling the failure of vp702x_usb_in_op.
Fixes: 786baecfe78f ("[media] dvb-usb: move it to drivers/media/usb/dvb-usb")
Signed-off-by: Dongliang Mu <mudongliangabcd@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
| -rw-r--r-- | drivers/media/usb/dvb-usb/vp702x.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/media/usb/dvb-usb/vp702x.c b/drivers/media/usb/dvb-usb/vp702x.c index bf54747e2e01..a1d9e4801a2b 100644 --- a/drivers/media/usb/dvb-usb/vp702x.c +++ b/drivers/media/usb/dvb-usb/vp702x.c @@ -291,16 +291,22 @@ static int vp702x_rc_query(struct dvb_usb_device *d, u32 *event, int *state) static int vp702x_read_mac_addr(struct dvb_usb_device *d,u8 mac[6]) { u8 i, *buf; + int ret; struct vp702x_device_state *st = d->priv; mutex_lock(&st->buf_mutex); buf = st->buf; - for (i = 6; i < 12; i++) - vp702x_usb_in_op(d, READ_EEPROM_REQ, i, 1, &buf[i - 6], 1); + for (i = 6; i < 12; i++) { + ret = vp702x_usb_in_op(d, READ_EEPROM_REQ, i, 1, + &buf[i - 6], 1); + if (ret < 0) + goto err; + } memcpy(mac, buf, 6); +err: mutex_unlock(&st->buf_mutex); - return 0; + return ret; } static int vp702x_frontend_attach(struct dvb_usb_adapter *adap) |