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| author | Stephen Smalley <stephen.smalley.work@gmail.com> | 2020-09-10 17:28:05 +0300 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2020-09-11 17:08:51 +0300 |
| commit | e8ba53d0023a76ba0f50e6ee3e6288c5442f9d33 (patch) | |
| tree | 041eb7d30a3154fc1f9f15d562a9d1e7c3b5d573 /security/selinux | |
| parent | 66ccd2560affc6e653ef7372ea36fb825743d186 (diff) | |
| download | linux-e8ba53d0023a76ba0f50e6ee3e6288c5442f9d33.tar.xz | |
selinux: access policycaps with READ_ONCE/WRITE_ONCE
Use READ_ONCE/WRITE_ONCE for all accesses to the
selinux_state.policycaps booleans to prevent compiler
mischief.
Signed-off-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'security/selinux')
| -rw-r--r-- | security/selinux/include/security.h | 14 | ||||
| -rw-r--r-- | security/selinux/ss/services.c | 3 |
2 files changed, 9 insertions, 8 deletions
diff --git a/security/selinux/include/security.h b/security/selinux/include/security.h index cbdd3c7aff8b..0ce2ef684ed0 100644 --- a/security/selinux/include/security.h +++ b/security/selinux/include/security.h @@ -164,49 +164,49 @@ static inline bool selinux_policycap_netpeer(void) { struct selinux_state *state = &selinux_state; - return state->policycap[POLICYDB_CAPABILITY_NETPEER]; + return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_NETPEER]); } static inline bool selinux_policycap_openperm(void) { struct selinux_state *state = &selinux_state; - return state->policycap[POLICYDB_CAPABILITY_OPENPERM]; + return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_OPENPERM]); } static inline bool selinux_policycap_extsockclass(void) { struct selinux_state *state = &selinux_state; - return state->policycap[POLICYDB_CAPABILITY_EXTSOCKCLASS]; + return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_EXTSOCKCLASS]); } static inline bool selinux_policycap_alwaysnetwork(void) { struct selinux_state *state = &selinux_state; - return state->policycap[POLICYDB_CAPABILITY_ALWAYSNETWORK]; + return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_ALWAYSNETWORK]); } static inline bool selinux_policycap_cgroupseclabel(void) { struct selinux_state *state = &selinux_state; - return state->policycap[POLICYDB_CAPABILITY_CGROUPSECLABEL]; + return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_CGROUPSECLABEL]); } static inline bool selinux_policycap_nnp_nosuid_transition(void) { struct selinux_state *state = &selinux_state; - return state->policycap[POLICYDB_CAPABILITY_NNP_NOSUID_TRANSITION]; + return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_NNP_NOSUID_TRANSITION]); } static inline bool selinux_policycap_genfs_seclabel_symlinks(void) { struct selinux_state *state = &selinux_state; - return state->policycap[POLICYDB_CAPABILITY_GENFS_SECLABEL_SYMLINKS]; + return READ_ONCE(state->policycap[POLICYDB_CAPABILITY_GENFS_SECLABEL_SYMLINKS]); } int security_mls_enabled(struct selinux_state *state); diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c index 8dc111fbe23a..9704c8a32303 100644 --- a/security/selinux/ss/services.c +++ b/security/selinux/ss/services.c @@ -2123,7 +2123,8 @@ static void security_load_policycaps(struct selinux_state *state, p = &policy->policydb; for (i = 0; i < ARRAY_SIZE(state->policycap); i++) - state->policycap[i] = ebitmap_get_bit(&p->policycaps, i); + WRITE_ONCE(state->policycap[i], + ebitmap_get_bit(&p->policycaps, i)); for (i = 0; i < ARRAY_SIZE(selinux_policycap_names); i++) pr_info("SELinux: policy capability %s=%d\n", |