From: Dan Carpenter <dan.carpenter@oracle.com>
To: kbuild@lists.01.org
Subject: [linux-next:master 3872/6512] net/bluetooth/smp.c:1633 smp_user_confirm_reply() warn: variable dereferenced before check 'conn' (see line 1631)
Date: Tue, 23 Mar 2021 15:43:24 +0300 [thread overview]
Message-ID: <20210323124324.GL1667@kadam> (raw)
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: d949689e7383cd5271470f2b99dbe2fd3199bffd
commit: 2e1614f7d61e407f1a8e7935a2903a6fa3cb0b11 [3872/6512] Bluetooth: SMP: Convert BT_ERR/BT_DBG to bt_dev_err/bt_dev_dbg
config: powerpc-randconfig-m031-20210323 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
smatch warnings:
net/bluetooth/smp.c:1633 smp_user_confirm_reply() warn: variable dereferenced before check 'conn' (see line 1631)
vim +/conn +1633 net/bluetooth/smp.c
2b64d153a0cc9d Brian Gix 2011-12-21 1623 int smp_user_confirm_reply(struct hci_conn *hcon, u16 mgmt_op, __le32 passkey)
2b64d153a0cc9d Brian Gix 2011-12-21 1624 {
b10e8017bd9d02 Johan Hedberg 2014-06-27 1625 struct l2cap_conn *conn = hcon->l2cap_data;
5d88cc73dded31 Johan Hedberg 2014-08-08 1626 struct l2cap_chan *chan;
2b64d153a0cc9d Brian Gix 2011-12-21 1627 struct smp_chan *smp;
2b64d153a0cc9d Brian Gix 2011-12-21 1628 u32 value;
fc75cc8684d21d Johan Hedberg 2014-09-05 1629 int err;
2b64d153a0cc9d Brian Gix 2011-12-21 1630
2e1614f7d61e40 Luiz Augusto von Dentz 2021-03-15 @1631 bt_dev_dbg(conn->hcon->hdev, "");
^^^^^^^^^^
Unchecked dereference
2b64d153a0cc9d Brian Gix 2011-12-21 1632
fc75cc8684d21d Johan Hedberg 2014-09-05 @1633 if (!conn)
^^^^^
Checked too late
2b64d153a0cc9d Brian Gix 2011-12-21 1634 return -ENOTCONN;
2b64d153a0cc9d Brian Gix 2011-12-21 1635
5d88cc73dded31 Johan Hedberg 2014-08-08 1636 chan = conn->smp;
5d88cc73dded31 Johan Hedberg 2014-08-08 1637 if (!chan)
5d88cc73dded31 Johan Hedberg 2014-08-08 1638 return -ENOTCONN;
5d88cc73dded31 Johan Hedberg 2014-08-08 1639
fc75cc8684d21d Johan Hedberg 2014-09-05 1640 l2cap_chan_lock(chan);
---
0-DAY CI Kernel Test Service, Intel Corporation
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WARNING: multiple messages have this Message-ID (diff)
From: Dan Carpenter <dan.carpenter@oracle.com>
To: kbuild-all@lists.01.org
Subject: [kbuild] [linux-next:master 3872/6512] net/bluetooth/smp.c:1633 smp_user_confirm_reply() warn: variable dereferenced before check 'conn' (see line 1631)
Date: Tue, 23 Mar 2021 15:43:24 +0300 [thread overview]
Message-ID: <20210323124324.GL1667@kadam> (raw)
[-- Attachment #1: Type: text/plain, Size: 2565 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: d949689e7383cd5271470f2b99dbe2fd3199bffd
commit: 2e1614f7d61e407f1a8e7935a2903a6fa3cb0b11 [3872/6512] Bluetooth: SMP: Convert BT_ERR/BT_DBG to bt_dev_err/bt_dev_dbg
config: powerpc-randconfig-m031-20210323 (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
smatch warnings:
net/bluetooth/smp.c:1633 smp_user_confirm_reply() warn: variable dereferenced before check 'conn' (see line 1631)
vim +/conn +1633 net/bluetooth/smp.c
2b64d153a0cc9d Brian Gix 2011-12-21 1623 int smp_user_confirm_reply(struct hci_conn *hcon, u16 mgmt_op, __le32 passkey)
2b64d153a0cc9d Brian Gix 2011-12-21 1624 {
b10e8017bd9d02 Johan Hedberg 2014-06-27 1625 struct l2cap_conn *conn = hcon->l2cap_data;
5d88cc73dded31 Johan Hedberg 2014-08-08 1626 struct l2cap_chan *chan;
2b64d153a0cc9d Brian Gix 2011-12-21 1627 struct smp_chan *smp;
2b64d153a0cc9d Brian Gix 2011-12-21 1628 u32 value;
fc75cc8684d21d Johan Hedberg 2014-09-05 1629 int err;
2b64d153a0cc9d Brian Gix 2011-12-21 1630
2e1614f7d61e40 Luiz Augusto von Dentz 2021-03-15 @1631 bt_dev_dbg(conn->hcon->hdev, "");
^^^^^^^^^^
Unchecked dereference
2b64d153a0cc9d Brian Gix 2011-12-21 1632
fc75cc8684d21d Johan Hedberg 2014-09-05 @1633 if (!conn)
^^^^^
Checked too late
2b64d153a0cc9d Brian Gix 2011-12-21 1634 return -ENOTCONN;
2b64d153a0cc9d Brian Gix 2011-12-21 1635
5d88cc73dded31 Johan Hedberg 2014-08-08 1636 chan = conn->smp;
5d88cc73dded31 Johan Hedberg 2014-08-08 1637 if (!chan)
5d88cc73dded31 Johan Hedberg 2014-08-08 1638 return -ENOTCONN;
5d88cc73dded31 Johan Hedberg 2014-08-08 1639
fc75cc8684d21d Johan Hedberg 2014-09-05 1640 l2cap_chan_lock(chan);
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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next reply other threads:[~2021-03-23 12:43 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-23 12:43 Dan Carpenter [this message]
2021-03-23 12:43 ` [kbuild] [linux-next:master 3872/6512] net/bluetooth/smp.c:1633 smp_user_confirm_reply() warn: variable dereferenced before check 'conn' (see line 1631) Dan Carpenter
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2021-03-23 9:52 kernel test robot
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