On Tue, May 05, 2020 at 05:31:54PM +0200, Mickaël Salaün wrote:
> Test propagation of noexec mount points or file executability through
> files open with or without O_MAYEXEC, thanks to the
> fs.open_mayexec_enforce sysctl.
>
> Signed-off-by: Mickaël Salaün <mic@xxxxxxxxxxx>
> Reviewed-by: Thibaut Sautereau <thibaut.sautereau@xxxxxxxxxxx>
> Cc: Aleksa Sarai <cyphar@xxxxxxxxxx>
> Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
> Cc: Kees Cook <keescook@xxxxxxxxxxxx>
> Cc: Shuah Khan <shuah@xxxxxxxxxx>
Yay tests! :) Notes below...
> diff --git a/tools/testing/selftests/openat2/Makefile b/tools/testing/selftests/openat2/Makefile
> index 4b93b1417b86..cb98bdb4d5b1 100644
> --- a/tools/testing/selftests/openat2/Makefile
> +++ b/tools/testing/selftests/openat2/Makefile
> @@ -1,7 +1,8 @@
> # SPDX-License-Identifier: GPL-2.0-or-later
>
> CFLAGS += -Wall -O2 -g -fsanitize=address -fsanitize=undefined
> -TEST_GEN_PROGS := openat2_test resolve_test rename_attack_test
> +LDLIBS += -lcap
> +TEST_GEN_PROGS := openat2_test resolve_test rename_attack_test omayexec_test
I realize the others have _test in their name, but that feels intensely
redundant to me. :)
> [...]
> diff --git a/tools/testing/selftests/openat2/omayexec_test.c b/tools/testing/selftests/openat2/omayexec_test.c
> new file mode 100644
> index 000000000000..7052c852daf8
> --- /dev/null
> +++ b/tools/testing/selftests/openat2/omayexec_test.c
> [...]
> +FIXTURE_DATA(mount_exec_file_exec) { };
For each of these, Please use "FIXTURE" not "FIXTURE_DATA". See:
1ae81d78a8b2 ("selftests/seccomp: Adjust test fixture counts")
> +FIXTURE_SETUP(mount_exec_file_exec)
> +{
> + create_workspace(_metadata, 1, 1);
Maybe save the system's original sysctl in create_workspace() instead
of always restoring it to 0 in delete_workspace()?
Otherwise, looks good!
--
Kees Cook
