netdev - Re: [PATCH net v4 3/3] net: prevent address rewrite in kernel

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Date: Wed, 20 Sep 2023 09:30:40 -0400
From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
To: Jordan Rife <jrife@...gle.com>, 
 davem@...emloft.net, 
 edumazet@...gle.com, 
 kuba@...nel.org, 
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 willemdebruijn.kernel@...il.com, 
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 philipp.reisner@...bit.com, 
 lars.ellenberg@...bit.com, 
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 santosh.shilimkar@...cle.com, 
 Jordan Rife <jrife@...gle.com>, 
 stable@...r.kernel.org
Subject: Re: [PATCH net v4 3/3] net: prevent address rewrite in kernel_bind()

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@google.com/
> Fixes: 4fbac77d2d09 ("bpf: Hooks for sys_bind")
> Cc: stable@...r.kernel.org
> Signed-off-by: Jordan Rife <jrife@...gle.com>

Reviewed-by: Willem de Bruijn <willemb@...gle.com>