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SubjectRe: [PATCH] sys_personality: Add a optional arch hook arch_check_personality() for common sys_personality()
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Thanks for your reply, I wiil send it in version 2

Thanks,

            wangshaobo

在 2020/1/9 14:54, Dominik Brodowski 写道:
> On Thu, Jan 09, 2020 at 09:38:46AM +0800, Wang ShaoBo wrote:
>> currently arm64 use __arm64_sys_arm64_personality() as its default
>> syscall. But using a normal hook arch_check_personality() can reject
>> personality settings for special case of different archs.
> Thanks for your patch!
>
>> SYSCALL_DEFINE1(personality, unsigned int, personality)
>> {
>> - unsigned int old = current->personality;
>> + int check;
>>
>> - if (personality != 0xffffffff)
>> - set_personality(personality);
>> + check = arch_check_personality(personality);
>> + if (check)
>> + return check;
>>
>> - return old;
>> + return ksys_personality(personality);
>> }
> Please leave the default check and call to set_personality()
> in here and remove the now-unneeded ksys_personality() from
> include/linux/syscalls.h
>
> Thanks,
> Dominik
>
> .

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