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kodi: linux use MFD_NOEXEC_SEAL for shared memory #8430

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heitbaum
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@heitbaum heitbaum commented Dec 16, 2023

ref:

The new MFD_NOEXEC_SEAL and MFD_EXEC flags allows application to set executable bit at creation time (memfd_create).

When MFD_NOEXEC_SEAL is set, memfd is created without executable bit (mode:0666), and sealed with F_SEAL_EXEC, so it can't be chmod to be executable (mode: 0777) after creation.

When MFD_EXEC flag is set, memfd is created with executable bit (mode:0777), this is the same as the old behavior of memfd_create.

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lrusak commented Jan 30, 2024

Does this actually fix an issue or is it just pedantic?

@heitbaum
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Does this actually fix an issue or is it just pedantic?

Since kernel 6.3 the error/warning memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=yyy 'yyy' appears in the kernel logs. With the patch the error/warning does not occur.

@CvH CvH added LE 13.0 and removed LE 12.0 labels Mar 12, 2024
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