On Wed, Jun 27, 2018 at 5:05 PM, Andrey Konovalov andreyknvl@google.com wrote:
On Tue, Jun 26, 2018 at 7:29 PM, Catalin Marinas catalin.marinas@arm.com wrote:
While I support this work, as a maintainer I'd like to understand whether we'd be in a continuous chase of ABI breaks with every kernel release or we have a better way to identify potential issues. Is there any way to statically analyse conversions from __user ptr to long for example? Or, could we get the compiler to do this for us?
OK, got it, I'll try to figure out a way to find these conversions.
I've prototyped a checker on top of clang static analyzer (initially looked at sparse, but couldn't find any documentation or examples). The results are here [1], search for "warning: user pointer cast". Sharing in case anybody wants to take a look, will look at them myself tomorrow.
[1] https://gist.github.com/xairy/433edd5c86456a64026247cb2fef2115 -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html