On 01.06.2017 21:51, Mikko Perttunen wrote: > On 06/01/2017 09:44 PM, Dmitry Osipenko wrote: >> On 01.06.2017 21:37, Dmitry Osipenko wrote: >>> On 01.06.2017 20:39, Mikko Perttunen wrote: >>>> Reviewed-by: Mikko Perttunen <mperttunen@xxxxxxxxxx> >>>> >>>> On 05/23/2017 03:14 AM, Dmitry Osipenko wrote: >>>>> Incorrectly shifted relocation address will cause a lower memory corruption >>>>> and likely a hang on a write or a read of an arbitrary data in case of IOMMU >>>>> absent. As of now there is no use for the address shifting (at least on >>>>> Tegra20) and adding a proper shifting / sizes validation is much more work. >>>> >>>> Perhaps change to "As of now there is no use for the address shifting on >>>> Tegra20" if you post another revision. >>>> >>> I'll post a new revision of the series after getting comments to the all >>> patches, to not churn the ML. Thank you very much for the reviews! >>> >> >> However, given your previous comments to this patch, I'll probably add a bypass >> of the shit checking in case of IOMMU presence. >> The IOMMU presence checking probably wouldn't be enough. Better to check the Host1x version instead, to not break the non-IOMMU case on modern Tegras. > > I don't think that's needed - the firewall will deny pretty much all VIC > submissions due to is_addr_reg not being implemented so it cannot reasonably be > used on modern Tegras anyway. Either firewall should be completely avoided on newer Tegras or it should perform at least some checks and not break the newer Tegras. -- Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
