Re: [PATCH] selftests: capabilities: namespace create varies for root and normal user
On Tue, Nov 07, 2023 at 02:23:34PM -0700, Shuah Khan wrote:
> On 9/29/23 06:53, Swarup Laxman Kotiaklapudi wrote:
> > Change namespace creation for root and non-root
> > user differently in create_and_enter_ns() function
> >
>
> Sorry for the delay on reviewing this.
>
> Can you tell me more about why this change is needed and
> include it in the change log.
>
> thanks,
> -- Shuah
Hi Shuah,
This patchset was raised to fix below TODO:
"If we're already root, we could skip creating the userns."
Without this patchset, function create_and_enter_ns(),
at this path --> tools/testing/selftests/capabilities/test_execve.c
was as mentioned below:
static bool create_and_enter_ns(uid_t inner_uid)
{
if (unshare(CLONE_NEWNS) == 0) {
} else if (unshare(CLONE_NEWUSER | CLONE_NEWNS) == 0) {
} else {
ksft_exit_skip("must be root or be able to create a userns\n");
}
...
}
To fix the TODO, above mentioned if block is executed if root user,
for normal user it enters inside 'else if' block.
Thanks,
Swarup
Re: [PATCH] selftests: capabilities: namespace create varies for root and normal user
On 9/29/23 06:53, Swarup Laxman Kotiaklapudi wrote: Change namespace creation for root and non-root user differently in create_and_enter_ns() function Sorry for the delay on reviewing this. Can you tell me more about why this change is needed and include it in the change log. thanks, -- Shuah
Re: [PATCH] selftests: capabilities: namespace create varies for root and normal user
esOn Fri, Sep 29, 2023 at 06:23:48PM +0530, Swarup Laxman Kotiaklapudi wrote:
> Change namespace creation for root and non-root
> user differently in create_and_enter_ns() function
>
> Test result with root user:
> $sudo make TARGETS="capabilities" kselftest
> ...
> TAP version 13
> 1..1
> timeout set to 45
> selftests: capabilities: test_execve
> TAP version 13
> 1..12
> [RUN] +++ Tests with uid == 0 +++
> [NOTE] Using global UIDs for tests
> [RUN] Root => ep
> ...
> ok 12 Passed
> Totals: pass:12 fail:0 xfail:0 xpass:0 skip:0 error:0
> ==
> TAP version 13
> 1..9
> [RUN] +++ Tests with uid != 0 +++
> [NOTE] Using global UIDs for tests
> [RUN] Non-root => no caps
> ...
> ok 9 Passed
> Totals: pass:9 fail:0 xfail:0 xpass:0 skip:0 error:0
>
> Test result without root or normal user:
> $make TARGETS="capabilities" kselftest
> ...
> timeout set to 45
> selftests: capabilities: test_execve
> TAP version 13
> 1..12
> [RUN] +++ Tests with uid == 0 +++
> [NOTE] Using a user namespace for tests
> [RUN] Root => ep
> validate_cap:: Capabilities after execve were correct
> ok 1 Passed
> Check cap_ambient manipulation rules
> ok 2 PR_CAP_AMBIENT_RAISE failed on non-inheritable cap
> ok 3 PR_CAP_AMBIENT_RAISE failed on non-permitted cap
> ok 4 PR_CAP_AMBIENT_RAISE worked
> ok 5 Basic manipulation appears to work
> [RUN] Root +i => eip
> validate_cap:: Capabilities after execve were correct
> ok 6 Passed
> [RUN] UID 0 +ia => eipa
> validate_cap:: Capabilities after execve were correct
> ok 7 Passed
> ok 8 # SKIP SUID/SGID tests (needs privilege)
> Planned tests != run tests (12 != 8)
> Totals: pass:7 fail:0 xfail:0 xpass:0 skip:1 error:0
> ==
> TAP version 13
> 1..9
> [RUN] +++ Tests with uid != 0 +++
> [NOTE] Using a user namespace for tests
> [RUN] Non-root => no caps
> validate_cap:: Capabilities after execve were correct
> ok 1 Passed
> Check cap_ambient manipulation rules
> ok 2 PR_CAP_AMBIENT_RAISE failed on non-inheritable cap
> ok 3 PR_CAP_AMBIENT_RAISE failed on non-permitted cap
> ok 4 PR_CAP_AMBIENT_RAISE worked
> ok 5 Basic manipulation appears to work
> [RUN] Non-root +i => i
> validate_cap:: Capabilities after execve were correct
> ok 6 Passed
> [RUN] UID 1 +ia => eipa
> validate_cap:: Capabilities after execve were correct
> ok 7 Passed
> ok 8 # SKIP SUID/SGID tests (needs privilege)
> Planned tests != run tests (9 != 8)
> Totals: pass:7 fail:0 xfail:0 xpass:0 skip:1 error:0
>
> Signed-off-by: Swarup Laxman Kotiaklapudi
> ---
> tools/testing/selftests/capabilities/test_execve.c | 6 +-
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/tools/testing/selftests/capabilities/test_execve.c
> b/tools/testing/selftests/capabilities/test_execve.c
> index df0ef02b4036..8236150d377e 100644
> --- a/tools/testing/selftests/capabilities/test_execve.c
> +++ b/tools/testing/selftests/capabilities/test_execve.c
> @@ -96,11 +96,7 @@ static bool create_and_enter_ns(uid_t inner_uid)
> outer_uid = getuid();
> outer_gid = getgid();
>
> - /*
> - * TODO: If we're already root, we could skip creating the userns.
> - */
> -
> - if (unshare(CLONE_NEWNS) == 0) {
> + if (outer_uid == 0 && unshare(CLONE_NEWNS) == 0) {
> ksft_print_msg("[NOTE]\tUsing global UIDs for tests\n");
> if (prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0) != 0)
> ksft_exit_fail_msg("PR_SET_KEEPCAPS - %s\n",
> --
> 2.34.1
>
Hi Shuah,
Please review this patchset.
Thanks,
Swarup
[PATCH] selftests: capabilities: namespace create varies for root and normal user
Change namespace creation for root and non-root
user differently in create_and_enter_ns() function
Test result with root user:
$sudo make TARGETS="capabilities" kselftest
...
TAP version 13
1..1
timeout set to 45
selftests: capabilities: test_execve
TAP version 13
1..12
[RUN] +++ Tests with uid == 0 +++
[NOTE] Using global UIDs for tests
[RUN] Root => ep
...
ok 12 Passed
Totals: pass:12 fail:0 xfail:0 xpass:0 skip:0 error:0
==
TAP version 13
1..9
[RUN] +++ Tests with uid != 0 +++
[NOTE] Using global UIDs for tests
[RUN] Non-root => no caps
...
ok 9 Passed
Totals: pass:9 fail:0 xfail:0 xpass:0 skip:0 error:0
Test result without root or normal user:
$make TARGETS="capabilities" kselftest
...
timeout set to 45
selftests: capabilities: test_execve
TAP version 13
1..12
[RUN] +++ Tests with uid == 0 +++
[NOTE] Using a user namespace for tests
[RUN] Root => ep
validate_cap:: Capabilities after execve were correct
ok 1 Passed
Check cap_ambient manipulation rules
ok 2 PR_CAP_AMBIENT_RAISE failed on non-inheritable cap
ok 3 PR_CAP_AMBIENT_RAISE failed on non-permitted cap
ok 4 PR_CAP_AMBIENT_RAISE worked
ok 5 Basic manipulation appears to work
[RUN] Root +i => eip
validate_cap:: Capabilities after execve were correct
ok 6 Passed
[RUN] UID 0 +ia => eipa
validate_cap:: Capabilities after execve were correct
ok 7 Passed
ok 8 # SKIP SUID/SGID tests (needs privilege)
Planned tests != run tests (12 != 8)
Totals: pass:7 fail:0 xfail:0 xpass:0 skip:1 error:0
==
TAP version 13
1..9
[RUN] +++ Tests with uid != 0 +++
[NOTE] Using a user namespace for tests
[RUN] Non-root => no caps
validate_cap:: Capabilities after execve were correct
ok 1 Passed
Check cap_ambient manipulation rules
ok 2 PR_CAP_AMBIENT_RAISE failed on non-inheritable cap
ok 3 PR_CAP_AMBIENT_RAISE failed on non-permitted cap
ok 4 PR_CAP_AMBIENT_RAISE worked
ok 5 Basic manipulation appears to work
[RUN] Non-root +i => i
validate_cap:: Capabilities after execve were correct
ok 6 Passed
[RUN] UID 1 +ia => eipa
validate_cap:: Capabilities after execve were correct
ok 7 Passed
ok 8 # SKIP SUID/SGID tests (needs privilege)
Planned tests != run tests (9 != 8)
Totals: pass:7 fail:0 xfail:0 xpass:0 skip:1 error:0
Signed-off-by: Swarup Laxman Kotiaklapudi
---
tools/testing/selftests/capabilities/test_execve.c | 6 +-
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/tools/testing/selftests/capabilities/test_execve.c
b/tools/testing/selftests/capabilities/test_execve.c
index df0ef02b4036..8236150d377e 100644
--- a/tools/testing/selftests/capabilities/test_execve.c
+++ b/tools/testing/selftests/capabilities/test_execve.c
@@ -96,11 +96,7 @@ static bool create_and_enter_ns(uid_t inner_uid)
outer_uid = getuid();
outer_gid = getgid();
- /*
-* TODO: If we're already root, we could skip creating the userns.
-*/
-
- if (unshare(CLONE_NEWNS) == 0) {
+ if (outer_uid == 0 && unshare(CLONE_NEWNS) == 0) {
ksft_print_msg("[NOTE]\tUsing global UIDs for tests\n");
if (prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0) != 0)
ksft_exit_fail_msg("PR_SET_KEEPCAPS - %s\n",
--
2.34.1
