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Thu, 11 Jun 2026 15:37:32 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Thu, 11 Jun 2026 18:37:30 -0400 Message-Id: Cc: , , , , , , , Subject: Re: [PATCH] selftests/bpf: Add test for sleepable lsm_cgroup rejection From: "Emil Tsalapatis" To: "David Windsor" , , , , , , X-Mailer: aerc 0.21.0-0-g5549850facc2 References: <20260611143549.703914-1-dwindsor@gmail.com> In-Reply-To: <20260611143549.703914-1-dwindsor@gmail.com> On Thu Jun 11, 2026 at 10:35 AM EDT, David Windsor wrote: > Confirm the verifier rejects loading a sleepable BPF_LSM_CGROUP program, > as introduced in commit 5b038319be44 ("bpf: Reject sleepable > BPF_LSM_CGROUP programs at load time"). > > Signed-off-by: David Windsor Reviewed-by: Emil Tsalapatis > --- > tools/testing/selftests/bpf/progs/verifier_lsm.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/tools/testing/selftests/bpf/progs/verifier_lsm.c b/tools/tes= ting/selftests/bpf/progs/verifier_lsm.c > index 38e8e9176862..2f8103bfa14e 100644 > --- a/tools/testing/selftests/bpf/progs/verifier_lsm.c > +++ b/tools/testing/selftests/bpf/progs/verifier_lsm.c > @@ -188,4 +188,13 @@ int BPF_PROG(null_check, struct file *file) > return 0; > } > =20 > +SEC("lsm_cgroup/file_open") > +__description("sleepable lsm_cgroup program is rejected") > +__failure __msg("Program of this type cannot be sleepable") > +__flag(BPF_F_SLEEPABLE) > +int BPF_PROG(sleepable_lsm_cgroup) > +{ > + return 0; > +} > + > char _license[] SEC("license") =3D "GPL"; > > base-commit: 30dee2c176e7954f63d1fa3e52d172f30beb9bfb