LSM: Support ptrace sidechannel access checks
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- v6 Latest5 patches 1 replyIn review
- v55 patches 22 repliesSuperseded
Patches in v6 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/5 | AppArmor: Prepare for PTRACE_MODE_SCHEDsecurity/ security/ security/ +1 more | +10 | 0 replies | |
| 2/5 | Smack: Prepare for PTRACE_MODE_SCHEDsecurity/ | +2 | 0 replies | |
| 3/5 | SELinux: Prepare for PTRACE_MODE_SCHEDsecurity/ | +2 | 0 replies | |
| 4/5 | Capability: Complete PTRACE_MODE_SCHEDkernel/ security/ | +2 | 0 replies | |
| 5/5 | sidechannel: Linux Security Module for sidechannelinclude/ security/ security/ +4 more | +111 | 1 reply |
Reviews trailers per patch
No Reviewed-by, Acked-by or Tested-by trailers for v6 yet.
Cover letter [PATCH v6 0/5] LSM: Support ptrace sidechannel access checks
V6: Based on Tim Chen's "[Patch v4 00/18] Provide process property
based options to enable Spectre v2 userspace-userspace protection*" patch set.
v5: Revamped to match Jiri Kosina <[email protected]>
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.
--- 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 | 3 +- 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(+), 11 deletions(-)