6.15-stable review patch. If anyone has any objections, please let me know.
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From: Nicolin Chen nicolinc@nvidia.com
commit a9bf67ee170514b17541038c60bb94cb2cf5732f upstream.
The mfd and mfd_buffer will be used in the tests directly without an extra check. Test them in setup_sizes() to ensure they are safe to use.
Fixes: 0bcceb1f51c7 ("iommufd: Selftest coverage for IOMMU_IOAS_MAP_FILE") Link: https://patch.msgid.link/r/94bdc11d2b6d5db337b1361c5e5fce0ed494bb40.17507879... Cc: stable@vger.kernel.org Reviewed-by: Jason Gunthorpe jgg@nvidia.com Signed-off-by: Nicolin Chen nicolinc@nvidia.com Signed-off-by: Jason Gunthorpe jgg@nvidia.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- tools/testing/selftests/iommu/iommufd.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/tools/testing/selftests/iommu/iommufd.c +++ b/tools/testing/selftests/iommu/iommufd.c @@ -54,6 +54,8 @@ static __attribute__((constructor)) void
mfd_buffer = memfd_mmap(BUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, &mfd); + assert(mfd_buffer != MAP_FAILED); + assert(mfd > 0); }
FIXTURE(iommufd)