Re: [PATCH net v5 3/3] net: prevent address rewrite in kernel_bind()

On Thu, Sep 21, 2023 at 06:46:42PM -0500, 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() in net with kernel_bind()

Link: https://lore.kernel.org/netdev/20230912013332.2048422-1-jrife@google.com/ Fixes: 4fbac77d2d09 ("bpf: Hooks for sys_bind") Cc: stable@vger.kernel.org Reviewed-by: Willem de Bruijn willemb@google.com Signed-off-by: Jordan Rife jrife@google.com

Reviewed-by: Simon Horman horms@kernel.org