tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.10 head: a14daa5347bacafd6b416560b38bc48a3e80cc67 commit: ad25b27bf35f7dcf7f3c87bfc7852599e6242111 [98/107] UPSTREAM: Bluetooth: SMP: Convert BT_ERR/BT_DBG to bt_dev_err/bt_dev_dbg config: h8300-randconfig-m031-20210618 (attached as .config) compiler: h8300-linux-gcc (GCC) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; smatch warnings: net/bluetooth/smp.c:1634 smp_user_confirm_reply() warn: variable dereferenced before check 'conn' (see line 1632) vim +/conn +1634 net/bluetooth/smp.c 2b64d153a0cc9d Brian Gix 2011-12-21 1624 int smp_user_confirm_reply(struct hci_conn *hcon, u16 mgmt_op, __le32 passkey) 2b64d153a0cc9d Brian Gix 2011-12-21 1625 { b10e8017bd9d02 Johan Hedberg 2014-06-27 1626 struct l2cap_conn *conn = hcon->l2cap_data; 5d88cc73dded31 Johan Hedberg 2014-08-08 1627 struct l2cap_chan *chan; 2b64d153a0cc9d Brian Gix 2011-12-21 1628 struct smp_chan *smp; 2b64d153a0cc9d Brian Gix 2011-12-21 1629 u32 value; fc75cc8684d21d Johan Hedberg 2014-09-05 1630 int err; 2b64d153a0cc9d Brian Gix 2011-12-21 1631 ad25b27bf35f7d Luiz Augusto von Dentz 2021-03-15 @1632 bt_dev_dbg(conn->hcon->hdev, ""); ^^^^^^^^^^^^^^^^ Dereference 2b64d153a0cc9d Brian Gix 2011-12-21 1633 fc75cc8684d21d Johan Hedberg 2014-09-05 @1634 if (!conn) ^^^^^ Checked too late. 2b64d153a0cc9d Brian Gix 2011-12-21 1635 return -ENOTCONN; 2b64d153a0cc9d Brian Gix 2011-12-21 1636 5d88cc73dded31 Johan Hedberg 2014-08-08 1637 chan = conn->smp; 5d88cc73dded31 Johan Hedberg 2014-08-08 1638 if (!chan) 5d88cc73dded31 Johan Hedberg 2014-08-08 1639 return -ENOTCONN; 5d88cc73dded31 Johan Hedberg 2014-08-08 1640 fc75cc8684d21d Johan Hedberg 2014-09-05 1641 l2cap_chan_lock(chan); fc75cc8684d21d Johan Hedberg 2014-09-05 1642 if (!chan->data) { fc75cc8684d21d Johan Hedberg 2014-09-05 1643 err = -ENOTCONN; fc75cc8684d21d Johan Hedberg 2014-09-05 1644 goto unlock; fc75cc8684d21d Johan Hedberg 2014-09-05 1645 } fc75cc8684d21d Johan Hedberg 2014-09-05 1646 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org