From mboxrd@z Thu Jan 1 00:00:00 1970 From: casey.schaufler@intel.com (Casey Schaufler) Date: Wed, 26 Sep 2018 13:34:41 -0700 Subject: [PATCH v5 0/5] LSM: Support ptrace sidechannel access checks Message-ID: <20180926203446.2004-1-casey.schaufler@intel.com> To: linux-security-module@vger.kernel.org List-Id: linux-security-module.vger.kernel.org v5: Revamped to match Jiri Kosina Harden spectrev2 userspace-userspace protection v7 Fixed locking issues in the LSM code. Dropped the new LSM hook and use a ptrace hook instead. v4: select namespace checks if user namespaces are enabled and credential checks are request. v3: get_task_cred wasn't a good choice due to refcounts. Use lower level protection instead v2: SELinux access policy corrected. Use real_cred instead of cred. This patchset provide a mechanism by which a security module can advise the system about potential side-channel vulnerabilities. The existing security modules have been updated to avoid locking issues in the face of PTRACE_MODE_SCHED. A new security module is provided to make determinations regarding task attributes including namespaces. Signed-off-by: Casey Schaufler --- include/linux/lsm_hooks.h | 5 +++ kernel/ptrace.c | 2 - security/Kconfig | 1 + security/Makefile | 2 + security/apparmor/domain.c | 2 +- security/apparmor/include/ipc.h | 2 +- security/apparmor/ipc.c | 8 ++-- security/apparmor/lsm.c | 5 ++- security/commoncap.c | 2 + security/security.c | 1 + security/selinux/hooks.c | 2 + security/sidechannel/Kconfig | 13 ++++++ security/sidechannel/Makefile | 1 + security/sidechannel/sidechannel.c | 88 ++++++++++++++++++++++++++++++++++++++ security/smack/smack_lsm.c | 3 +- 15 files changed, 127 insertions(+), 10 deletions(-)