On 4/4/25 12:58 PM, Damien Le Moal wrote:
> On 4/3/25 12:45 PM, Henry Martin wrote:
The patch title should be:
ata: pata_pxa: Fix potential NULL pointer dereference in pxa_ata_probe()
>> devm_ioremap() returns NULL on error. Currently, pxa_ata_probe() does
>> not check for this case, which results in a NULL pointer dereference.
>
> , which can result in...
>
>>
>> Add NULL check after devm_ioremap() to prevent this issue.
>>
>> Fixes: 2dc6c6f15da9 ("[ARM] pata_pxa: DMA-capable PATA driver")
>> Signed-off-by: Henry Martin <bsdhenrymartin@xxxxxxxxx>
>> ---
>> drivers/ata/pata_pxa.c | 7 ++++++-
>> 1 file changed, 6 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/ata/pata_pxa.c b/drivers/ata/pata_pxa.c
>> index 434f380114af..cc76290a3b1a 100644
>> --- a/drivers/ata/pata_pxa.c
>> +++ b/drivers/ata/pata_pxa.c
>> @@ -223,11 +223,16 @@ static int pxa_ata_probe(struct platform_device *pdev)
>>
>> ap->ioaddr.cmd_addr = devm_ioremap(&pdev->dev, cmd_res->start,
>> resource_size(cmd_res));
>> + if (!ap->ioaddr.cmd_addr)
>> + return -ENOMEM;
>> ap->ioaddr.ctl_addr = devm_ioremap(&pdev->dev, ctl_res->start,
>> resource_size(ctl_res));
>> + if (!ap->ioaddr.ctl_addr)
>> + return -ENOMEM;
>> ap->ioaddr.bmdma_addr = devm_ioremap(&pdev->dev, dma_res->start,
>> resource_size(dma_res));
>> -
>> + if (!ap->ioaddr.bmdma_addr)
>> + return -ENOMEM;
>
> Please keep the blank line here.
>
>> /*
>> * Adjust register offsets
>> */
>
>
--
Damien Le Moal
Western Digital Research
