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Smack: Provide read control for io_uring_cmd
commit dd93734 upstream. Limit io_uring "cmd" options to files for which the caller has Smack read access. There may be cases where the cmd option may be closer to a write access than a read, but there is no way to make that determination. Cc: stable@vger.kernel.org Fixes: ee692a2 ("fs,io_uring: add infrastructure for uring-cmd") Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Signed-off-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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