linux-kernel - Re: [LKP] [ima] 8eb613c0b8: stress-ng.icache.ops_per

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Message-ID: <d5b6a48b-005c-e5cb-a82f-5f7225741100@linux.intel.com>
Date:   Fri, 12 Jun 2020 08:39:08 +0800
From:   Xing Zhengjun <zhengjun.xing@...ux.intel.com>
To:     Mimi Zohar <zohar@...ux.ibm.com>,
        kernel test robot <rong.a.chen@...el.com>
Cc:     Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org
Subject: Re: [LKP] [ima] 8eb613c0b8: stress-ng.icache.ops_per_sec -84.2%
 regression



On 6/11/2020 6:53 PM, Mimi Zohar wrote:
> On Thu, 2020-06-11 at 15:10 +0800, Xing Zhengjun wrote:
>> On 6/10/2020 9:53 PM, Mimi Zohar wrote:
>>   	ucode: 0x500002c
>>>
>>> Does the following change resolve it?
>>>
>>> diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
>>> index c44414a7f82e..78e1dfc8a3f2 100644
>>> --- a/security/integrity/ima/ima_main.c
>>> +++ b/security/integrity/ima/ima_main.c
>>> @@ -426,7 +426,8 @@ int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot)
>>>    	int pcr;
>>>    
>>>    	/* Is mprotect making an mmap'ed file executable? */
>>> -	if (!vma->vm_file || !(prot & PROT_EXEC) || (vma->vm_flags & VM_EXEC))
>>> +	if (!(ima_policy_flag & IMA_APPRAISE) || !vma->vm_file ||
>>> +	    !(prot & PROT_EXEC) || (vma->vm_flags & VM_EXEC))
>>>    		return 0;
>>>    
>>>    	security_task_getsecid(current, &secid);
>>>
>> Thanks. I test the change, it can resolve the regression.
> 
> Thanks!  Can I get your "Tested-by" tag?
> 
> Mimi
> 

Sure.

-- 
Zhengjun Xing