lkml.org 
[lkml]   [2016]   [Apr]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2] mwifiex: fix possible NULL dereference
On Tuesday 12 April 2016 05:20 PM, Arend van Spriel wrote:
>
>
> On 12-04-16 13:46, Sudip Mukherjee wrote:
>> From: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
>>
>> We have a check for card just after dereferencing it. So if it is NULL
>> we have already dereferenced it before its check. Lets dereference it
>> after checking card for NULL.
>
> And you are changing the scope of the pdev variable.

yes, and since all usage of pdev is inside the "if" block so it should
not matter.

regards
sudip

>
> Regards,
> Arend
>
>> Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
>> ---
>> drivers/net/wireless/marvell/mwifiex/pcie.c | 3 ++-
>> 1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/wireless/marvell/mwifiex/pcie.c b/drivers/net/wireless/marvell/mwifiex/pcie.c
>> index edf8b07..d4db9db 100644
>> --- a/drivers/net/wireless/marvell/mwifiex/pcie.c
>> +++ b/drivers/net/wireless/marvell/mwifiex/pcie.c
>> @@ -2884,10 +2884,11 @@ static void mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
>> {
>> struct pcie_service_card *card = adapter->card;
>> const struct mwifiex_pcie_card_reg *reg;
>> - struct pci_dev *pdev = card->dev;
>> int i;
>>
>> if (card) {
>> + struct pci_dev *pdev = card->dev;
>> +
>> if (card->msix_enable) {
>> for (i = 0; i < MWIFIEX_NUM_MSIX_VECTORS; i++)
>> synchronize_irq(card->msix_entries[i].vector);
>>

\
 
 \ /
  Last update: 2016-04-12 14:01    [W:0.039 / U:0.060 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site