From: Damien Le Moal <Damien.LeMoal@wdc.com>
To: James Bottomley <James.Bottomley@HansenPartnership.com>,
Jens Axboe <axboe@kernel.dk>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>
Cc: Sathya Prakash <sathya.prakash@broadcom.com>,
Sreekanth Reddy <sreekanth.reddy@broadcom.com>,
Suganath Prabu Subramani <suganath-prabu.subramani@broadcom.com>
Subject: Re: [PATCH v2 1/9] libata: fix ata_host_alloc_pinfo()
Date: Fri, 6 Aug 2021 14:31:42 +0000 [thread overview]
Message-ID: <DM6PR04MB7081DFB4CEBE50C234755191E7F39@DM6PR04MB7081.namprd04.prod.outlook.com> (raw)
In-Reply-To: 1647f71e4ef539ff17538223c944d9ec58806bdb.camel@HansenPartnership.com
On 2021/08/06 23:25, James Bottomley wrote:
> On Fri, 2021-08-06 at 16:42 +0900, Damien Le Moal wrote:
>> Avoid a potential NULL pointer dereference by testing that the ATA
>> port
>> info variable "pi".
>>
>> Reported-by: kernel test robot <lkp@intel.com>
>> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
>> ---
>> drivers/ata/libata-core.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
>> index 61c762961ca8..ea8b91297f12 100644
>> --- a/drivers/ata/libata-core.c
>> +++ b/drivers/ata/libata-core.c
>> @@ -5458,7 +5458,7 @@ struct ata_host *ata_host_alloc_pinfo(struct
>> device *dev,
>> ap->link.flags |= pi->link_flags;
>> ap->ops = pi->port_ops;
>
> Hey, pi is used here
>
>>
>> - if (!host->ops && (pi->port_ops !=
>> &ata_dummy_port_ops))
>> + if (!host->ops && pi && pi->port_ops !=
>> &ata_dummy_port_ops)
>
> So checking it here is just going to get us a load of static checker
> reports.
I got a load of static checker warnings already before sending this :)
And I got lost in that load obviously. Will check again.
>
> James
>
>
>
--
Damien Le Moal
Western Digital Research
next prev parent reply other threads:[~2021-08-06 14:31 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-06 7:42 [PATCH v2 0/9] libata cleanups and improvements Damien Le Moal
2021-08-06 7:42 ` [PATCH v2 1/9] libata: fix ata_host_alloc_pinfo() Damien Le Moal
2021-08-06 8:49 ` Hannes Reinecke
2021-08-06 14:25 ` James Bottomley
2021-08-06 14:31 ` Damien Le Moal [this message]
2021-08-06 7:42 ` [PATCH v2 2/9] libata: fix ata_host_start() Damien Le Moal
2021-08-06 8:50 ` Hannes Reinecke
2021-08-06 14:31 ` James Bottomley
2021-08-06 14:33 ` Damien Le Moal
2021-08-07 3:32 ` Damien Le Moal
2021-08-06 7:42 ` [PATCH v2 3/9] libata: cleanup device sleep capability detection Damien Le Moal
2021-08-06 8:50 ` Hannes Reinecke
2021-08-06 7:42 ` [PATCH v2 4/9] libata: cleanup ata_dev_configure() Damien Le Moal
2021-08-06 9:07 ` Hannes Reinecke
2021-08-06 9:12 ` Damien Le Moal
2021-08-06 9:28 ` Hannes Reinecke
2021-08-06 9:32 ` Damien Le Moal
2021-08-06 7:42 ` [PATCH v2 5/9] libata: cleanup NCQ priority handling Damien Le Moal
2021-08-06 9:09 ` Hannes Reinecke
2021-08-06 7:42 ` [PATCH v2 6/9] libata: fix ata_read_log_page() warning Damien Le Moal
2021-08-06 9:10 ` Hannes Reinecke
2021-08-06 7:42 ` [PATCH v2 7/9] libata: print feature list on device scan Damien Le Moal
2021-08-06 9:11 ` Hannes Reinecke
2021-08-06 7:42 ` [PATCH v2 8/9] libahci: Introduce ncq_prio_supported sysfs sttribute Damien Le Moal
2021-08-06 7:42 ` [PATCH v2 9/9] scsi: mpt3sas: Introduce sas_ncq_prio_supported " Damien Le Moal
2021-08-06 9:12 ` Hannes Reinecke
2021-08-06 9:16 ` Damien Le Moal
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