Re: [PATCH] fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass

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On Mon, Jun 23, 2025 at 04:21:15PM +0200, Vlastimil Babka wrote:
> On 6/23/25 16:01, Christoph Hellwig wrote:
> > On Mon, Jun 23, 2025 at 07:00:39AM -0700, Christoph Hellwig wrote:
> >> On Mon, Jun 23, 2025 at 12:16:27PM +0200, Christian Brauner wrote:
> >> > I'm more than happy to switch a bunch of our exports so that we only
> >> > allow them for specific modules. But for that we also need
> >> > EXPOR_SYMBOL_FOR_MODULES() so we can switch our non-gpl versions.
> >> 
> >> Huh?  Any export for a specific in-tree module (or set thereof) is
> >> by definition internals and an _GPL export if perfectly fine and
> >> expected.
> 
> Peterz tells me EXPORT_SYMBOL_GPL_FOR_MODULES() is not limited to in-tree
> modules, so external module with GPL and matching name can import.

Sure, technically they can.  But that's not the intent of the export,
but rather abusing it.





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