[LTP] [PATCH v2] security/dirtyc0w_shmem: Add new test for CVE-2022-2590

[Martin Doucha]

On 23. 11. 22 11:35, David Hildenbrand wrote:
> +	uffdio_api.api = UFFD_API;
> +	uffdio_api.features = UFFD_FEATURE_MINOR_SHMEM;
> +	TEST(ioctl(uffd, UFFDIO_API, &uffdio_api));
> +	if (TST_RET < 0) {

One more thing, checking just the ioctl() return value here is not 
enough. You need to check that uffdio_api.features still includes the 
UFFD_FEATURE_MINOR_SHMEM flag after the call. PPC64 does not seem to 
support it on kernel 5.14 and the ioctl() still succeeds there.

-- 
Martin Doucha   mdoucha@suse.cz
QA Engineer for Software Maintenance
SUSE LINUX, s.r.o.
CORSO IIa
Krizikova 148/34
186 00 Prague 8
Czech Republic