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bh=d0gCLMAdEl7pQfQ6TSrm/lELvECOWIakWq73URsq4yQ=; b=W2rdo71bRo4UdfuIxIPshCJe+vzGZ7SlvccPZZgStA1zJgth4lBT67cP6bh+7jEWAD0U4o tz0u+ht9Ck4LB+AefkYViPcjp3nRt+o+pUNwNH+RN/A7LWRUXEY0y6O3wq2Hs9qYkgzEDF RUGW3X0F+26KYjWr+o4aMwzHN5JBlas= X-MC-Unique: LdsMNu_cOKiE885BtM-B_A-1 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH 5/5] seccomp: block setns, unshare and execveat syscalls Date: Mon, 2 Aug 2021 14:03:03 +0100 Message-Id: <20210802130303.3300108-6-berrange@redhat.com> In-Reply-To: <20210802130303.3300108-1-berrange@redhat.com> References: <20210802130303.3300108-1-berrange@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=berrange@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.701, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eduardo Otubo , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1627909733366100001 setns/unshare are used to change namespaces which is not something QEMU needs to be able todo. execveat is a new variant of execve so should be blocked just like execve already is. Signed-off-by: Daniel P. Berrang=C3=A9 --- softmmu/qemu-seccomp.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/softmmu/qemu-seccomp.c b/softmmu/qemu-seccomp.c index a7bb5c350f..deaf8a4ef5 100644 --- a/softmmu/qemu-seccomp.c +++ b/softmmu/qemu-seccomp.c @@ -248,6 +248,11 @@ static const struct QemuSeccompSyscall denylist[] =3D { { SCMP_SYS(clone3), QEMU_SECCOMP_SET_SPAWN, 0, NULL, SCMP_ACT_ERRNO(ENOSYS) }, #endif +#ifdef __SNR_execveat + { SCMP_SYS(execveat), QEMU_SECCOMP_SET_SPAWN }, +#endif + { SCMP_SYS(setns), QEMU_SECCOMP_SET_SPAWN }, + { SCMP_SYS(unshare), QEMU_SECCOMP_SET_SPAWN }, /* resource control */ { SCMP_SYS(setpriority), QEMU_SECCOMP_SET_RESOURCECTL, 0, NULL, SCMP_ACT_ERRNO(EPERM) }, --=20 2.31.1