Re: [PATCH bpf-next 1/3] mm/vmalloc: introduce vmalloc_exec which allocates RO+X memory

[Christoph Hellwig]

On Wed, Jul 13, 2022 at 03:49:45PM +0000, Song Liu wrote:
> 
> 
> > On Jul 13, 2022, at 3:08 AM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> > 
> > NAK.  This is not something that should be an exported public API
> > ever.
> 
> Hmm.. I will remove EXPORT_SYMBOL_GPL (if we ever do a v2 of this..)

Even without that it really is not a vmalloc API anyway.  Executable
memory needs to be written first, so we should allocate it in that state
and only mark it executable after that write has completed.