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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: MN2PR11MB3807.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6bb4733e-ec40-4cab-68fe-08d934812e96 X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Jun 2021 06:52:48.5171 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Sh/UMrjuh4l58fXpptWwMJOBvQrxwBwLE8nd1iRpGXzM+JfbUfPMopgC078OXKZ9NdcxVwXwU6kiNEoG9ZjuCA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR11MB3789 X-OriginatorOrg: intel.com Subject: Re: [dpdk-dev] [PATCH 13/14] net/i40e/base: fix potentially uninitialized variables in NVM code X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" > -----Original Message----- > From: Zhang, RobinX > Sent: Friday, June 18, 2021 2:39 PM > To: dev@dpdk.org > Cc: Xing, Beilei ; Guo, Junfeng > ; Yang, SteveX ; Zhang, > RobinX ; stable@dpdk.org; Pau, Christopher > > Subject: [PATCH 13/14] net/i40e/base: fix potentially uninitialized varia= bles in > NVM code Seems there're 2 fixes in the patch, please split them. >=20 > The status of i40e_read_nvm_word is not checked, so variables set from th= is > function could be used uninitialized. In this case, preserve the existing= flow > that does not block initialization by initializing these values from the = start. >=20 > The variable checksum from i40e_calc_nvm_checksum is used before return > value is checked. Fix this logic. >=20 > Fixes: 8d6c51fcd24b ("i40e/base: get OEM version") > Fixes: 2db70574247b ("net/i40e/base: limit PF/VF specific code to that dr= iver > only") > Fixes: 8db9e2a1b232 ("i40e: base driver") > Fixes: 3ed6c3246f43 ("i40e/base: handle AQ timeout when releasing NVM") > Cc: stable@dpdk.org >=20 > Signed-off-by: Christopher Pau > Signed-off-by: Robin Zhang > --- > drivers/net/i40e/base/i40e_adminq.c | 6 ++++-- > drivers/net/i40e/base/i40e_nvm.c | 5 +++-- > 2 files changed, 7 insertions(+), 4 deletions(-) >=20 > diff --git a/drivers/net/i40e/base/i40e_adminq.c > b/drivers/net/i40e/base/i40e_adminq.c > index eafacbdbec..d27ccde29a 100644 > --- a/drivers/net/i40e/base/i40e_adminq.c > +++ b/drivers/net/i40e/base/i40e_adminq.c > @@ -648,8 +648,10 @@ enum i40e_status_code i40e_init_adminq(struct > i40e_hw *hw) { > struct i40e_adminq_info *aq =3D &hw->aq; > enum i40e_status_code ret_code; > - u16 cfg_ptr, oem_hi, oem_lo; > - u16 eetrack_lo, eetrack_hi; > + u16 oem_hi =3D 0, oem_lo =3D 0; > + u16 eetrack_hi =3D 0; > + u16 eetrack_lo =3D 0; > + u16 cfg_ptr =3D 0; > int retry =3D 0; >=20 > /* verify input for valid configuration */ diff --git > a/drivers/net/i40e/base/i40e_nvm.c b/drivers/net/i40e/base/i40e_nvm.c > index 67e58cc195..f385042601 100644 > --- a/drivers/net/i40e/base/i40e_nvm.c > +++ b/drivers/net/i40e/base/i40e_nvm.c > @@ -755,10 +755,11 @@ enum i40e_status_code > i40e_update_nvm_checksum(struct i40e_hw *hw) > DEBUGFUNC("i40e_update_nvm_checksum"); >=20 > ret_code =3D i40e_calc_nvm_checksum(hw, &checksum); > - le_sum =3D CPU_TO_LE16(checksum); > - if (ret_code =3D=3D I40E_SUCCESS) > + if (ret_code =3D=3D I40E_SUCCESS) { > + le_sum =3D CPU_TO_LE16(checksum); > ret_code =3D i40e_write_nvm_aq(hw, 0x00, > I40E_SR_SW_CHECKSUM_WORD, > 1, &le_sum, true); > + } >=20 > return ret_code; > } > -- > 2.25.1