Zbigniew Jędrzejewski-Szmek
6debb39826
When we have non-owner user or group entries, we need the mask for the acl to be valid. But acl_calc_mask() calculates the mask to include all permissions, even those that were masked before. Apparently this happens when we inherit *:r-x permissions from a parent directory — the kernel sets *:r-x, mask:r--, effectively masking the executable bit. acl_calc_mask() would set the mask:r-x, effectively enabling the bit. To avoid this, be more conservative when to add the mask entry: first iterate over all entries, and do nothing if a mask. This returns the code closer to J.A.Steffens' original version in v204-90-g23ad4dd884. Should fix https://github.com/systemd/systemd/issues/1977.
systemd - System and Service Manager
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