On Thu, Apr 21, 2022 at 11:46:57PM +0000, Dhanraj, Vijay wrote:
Hi All,
I evaluated V4 patch changes with Gramine and ran into an issue when trying to set EPC page permission to PROT_NONE. It looks like with V3 patch series a change was introduced which requires kernel to have at least R permission when calling RESTRICT IOCTL. This change was done under the assumption that EPCM requires at least R permission for EMODPE/EACCEPT to succeed. But when testing with V2 version, EACCEPT worked fine with page permission set to PROT_NONE.
Thanks to @Shanahan, Mark for confirming that EPCM does not need to have R value to allow EACCEPT or EMODPE. Given this, can we please revert this change?
Thanks, -Vijay
Let's try to avoid top-posting and split the lines appropriately.
BR, Jarkko