Re: Regression with getcifsacl(1) in v6.14-rc1

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On Wednesday 12 February 2025 19:19:00 Paulo Alcantara wrote:
> Pali Rohár <pali@xxxxxxxxxx> writes:
> 
> > On Wednesday 12 February 2025 17:49:31 Paulo Alcantara wrote:
> >> Steve,
> >> 
> >> The commit 438e2116d7bd ("cifs: Change translation of
> >> STATUS_PRIVILEGE_NOT_HELD to -EPERM") regressed getcifsacl(1) because it
> >> expects -EIO to be returned from getxattr(2) when the client can't read
> >> system.cifs_ntsd_full attribute and then fall back to system.cifs_acl
> >> attribute.  Either -EIO or -EPERM is wrong for getxattr(2), but that's a
> >> different problem, though.
> >> 
> >> Reproduced against samba-4.22 server.
> >
> > That is bad. I can prepare a fix for cifs.ko getxattr syscall to
> > translate -EPERM to -EIO. This will ensure that getcifsacl will work as
> > before as it would still see -EIO error.
> 
> Sounds good.

Now I quickly prepared a fix, it is straightforward but I have not
tested it yet. Testing requires non-admin user which does not have
SeSecurityPrivilege privilege configured. Could you check if it is
fixing this problem?





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