Re: [PATCH 1/2] um: Set secure access mode for temporary file

[MickaÃl SalaÃn]

On 28/11/2015 22:40, Richard Weinberger wrote:
> Am 28.11.2015 um 22:32 schrieb MickaÃl SalaÃn:
>> Replace the default insecure mode 0777 with 0700 for temporary file.
>>
>> Prohibit other users to change the executable mapped code.
> 
> Hmm, isn't the tmp file already unlinked at this stage?
> 

Yes, but if someone could open it before the unlink e.g. because of the umask (which does not seems to be the case thanks to mkstemp, but remains unspecified [1]), this user should then be able to have write access to the file descriptor/description.

 MickaÃl

1. http://man7.org/linux/man-pages/man3/mkstemp.3.html#NOTES

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