Re: [PATCH] scsi: megaraid: check kzalloc

[Libo Chen <clbchenlibo.chen@huawei.com>]

On 2013/5/24 11:20, Santosh Y wrote:
> On Fri, May 24, 2013 at 7:52 AM, Libo Chen <clbchenlibo.chen@huawei.com> wrote:
>>
>> we should check kzalloc, avoid to hit oops
>>
>> Signed-off-by: Libo Chen <libo.chen@huawei.com>
>> ---
>>  drivers/scsi/megaraid.c |    4 ++++
>>  1 files changed, 4 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
>> index 846f475..195b095 100644
>> --- a/drivers/scsi/megaraid.c
>> +++ b/drivers/scsi/megaraid.c
>> @@ -4162,6 +4162,10 @@ mega_internal_command(adapter_t *adapter, megacmd_t *mc, mega_passthru *pthru)
>>
>>         sdev = kzalloc(sizeof(struct scsi_device), GFP_KERNEL);
>>         scmd->device = sdev;
>                               ^^^^^^
> I guess assigning after the NULL check of 'sdev' is more appropriate.

Ah, there is a little different.  ok, I will update.


Thanks,

Libo

> 
>> +       if (!scmd->device) {
>> +               scsi_free_command(GFP_KERNEL, scmd);
>> +               return -ENOMEM;
>> +       }
>>
>>         memset(adapter->int_cdb, 0, sizeof(adapter->int_cdb));
>>         scmd->cmnd = adapter->int_cdb;
>> --
>> 1.7.1
>>
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> 
> 
>