Re: [PATCH net v4 3/3] net: prevent address rewrite in kernel_bind()

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On Wed, 2023-09-20 at 09:30 -0400, Willem de Bruijn wrote:
> Jordan Rife wrote:
> > Similar to the change in commit 0bdf399342c5("net: Avoid address
> > overwrite in kernel_connect"), BPF hooks run on bind may rewrite the
> > address passed to kernel_bind(). This change
> > 
> > 1) Makes a copy of the bind address in kernel_bind() to insulate
> >    callers.
> > 2) Replaces direct calls to sock->ops->bind() with kernel_bind()
> > 
> > Link: https://lore.kernel.org/netdev/20230912013332.2048422-1-jrife@xxxxxxxxxx/
> > Fixes: 4fbac77d2d09 ("bpf: Hooks for sys_bind")
> > Cc: stable@xxxxxxxxxxxxxxx
> > Signed-off-by: Jordan Rife <jrife@xxxxxxxxxx>
> 
> Reviewed-by: Willem de Bruijn <willemb@xxxxxxxxxx>

I fear this is going to cause a few conflicts with other trees. We can
still take it, but at very least we will need some acks from the
relevant maintainers.

I *think* it would be easier split this and patch 1/3 in individual
patches targeting the different trees, hopefully not many additional
patches will be required. What do you think?

Cheers,

Paolo





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