Re: [PATCH] Use memzero_explicit to clear local buffers

From: Herbert Xu
Date: Tue Jan 06 2015 - 15:56:33 EST


On Tue, Jan 06, 2015 at 08:42:26PM +0100, Giel van Schijndel wrote:
>
> Question: are you sure the compiler won't optimize the call to memset(0)
> way if it's immediately followed by kfree()?

Yes it won't be optimised away. However, you could use kzfree.

> Another actually does change a stack-allocated buffer, I'll split that
> one off right away.

OK.

Thanks,
--
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/