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net: sctp: sctp_setsockopt_auth_key: use kzfree instead of kfree
[ Upstream commit 6ba542a291a5e558603ac51cda9bded347ce7627 ] In sctp_setsockopt_auth_key, we create a temporary copy of the user passed shared auth key for the endpoint or association and after internal setup, we free it right away. Since it's sensitive data, we should zero out the key before returning the memory back to the allocator. Thus, use kzfree instead of kfree, just as we do in sctp_auth_key_put(). Signed-off-by: Daniel Borkmann <firstname.lastname@example.org> Signed-off-by: David S. Miller <email@example.com> Signed-off-by: Greg Kroah-Hartman <firstname.lastname@example.org>
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