diff --git a/security/selinux/ss/context.h b/security/selinux/ss/context.h index 0562bacb7b996f56432a63d3f6d03ebbca43bd50..2eee0dab524d831585624f722f40e8f3e86b61a3 100644 --- a/security/selinux/ss/context.h +++ b/security/selinux/ss/context.h @@ -55,6 +55,29 @@ static inline int mls_context_cpy(struct context *dst, struct context *src) return rc; } +/* + * Sets both levels in the MLS range of 'dst' to the low level of 'src'. + */ +static inline int mls_context_cpy_low(struct context *dst, struct context *src) +{ + int rc; + + if (!selinux_mls_enabled) + return 0; + + dst->range.level[0].sens = src->range.level[0].sens; + rc = ebitmap_cpy(&dst->range.level[0].cat, &src->range.level[0].cat); + if (rc) + goto out; + + dst->range.level[1].sens = src->range.level[0].sens; + rc = ebitmap_cpy(&dst->range.level[1].cat, &src->range.level[0].cat); + if (rc) + ebitmap_destroy(&dst->range.level[0].cat); +out: + return rc; +} + static inline int mls_context_cmp(struct context *c1, struct context *c2) { if (!selinux_mls_enabled) diff --git a/security/selinux/ss/mls.c b/security/selinux/ss/mls.c index b4f682dc13ff36b14736166e84b8471c436a875d..4a8bab2f3c712445f020fbe3a42a8aa4f172442c 100644 --- a/security/selinux/ss/mls.c +++ b/security/selinux/ss/mls.c @@ -270,7 +270,7 @@ int mls_context_to_sid(char oldc, if (!defcon) goto out; - rc = mls_copy_context(context, defcon); + rc = mls_context_cpy(context, defcon); goto out; } @@ -400,26 +400,6 @@ int mls_from_string(char *str, struct context *context, gfp_t gfp_mask) return rc; } -/* - * Copies the effective MLS range from `src' into `dst'. - */ -static inline int mls_scopy_context(struct context *dst, - struct context *src) -{ - int l, rc = 0; - - /* Copy the MLS range from the source context */ - for (l = 0; l < 2; l++) { - dst->range.level[l].sens = src->range.level[0].sens; - rc = ebitmap_cpy(&dst->range.level[l].cat, - &src->range.level[0].cat); - if (rc) - break; - } - - return rc; -} - /* * Copies the MLS range `range' into `context'. */ @@ -552,19 +532,19 @@ int mls_compute_sid(struct context *scontext, case AVTAB_CHANGE: if (tclass == SECCLASS_PROCESS) /* Use the process MLS attributes. */ - return mls_copy_context(newcontext, scontext); + return mls_context_cpy(newcontext, scontext); else /* Use the process effective MLS attributes. */ - return mls_scopy_context(newcontext, scontext); + return mls_context_cpy_low(newcontext, scontext); case AVTAB_MEMBER: /* Only polyinstantiate the MLS attributes if the type is being polyinstantiated */ if (newcontext->type != tcontext->type) { /* Use the process effective MLS attributes. */ - return mls_scopy_context(newcontext, scontext); + return mls_context_cpy_low(newcontext, scontext); } else { /* Use the related object MLS attributes. */ - return mls_copy_context(newcontext, tcontext); + return mls_context_cpy(newcontext, tcontext); } default: return -EINVAL; diff --git a/security/selinux/ss/mls.h b/security/selinux/ss/mls.h index 661d6fc76966bdf18a536b933238e4a659c09c90..096d1b4ef7fbb7cd7759cd9148840df3e0e2af5c 100644 --- a/security/selinux/ss/mls.h +++ b/security/selinux/ss/mls.h @@ -24,26 +24,6 @@ #include "context.h" #include "policydb.h" -/* - * Copies the MLS range from `src' into `dst'. - */ -static inline int mls_copy_context(struct context *dst, - struct context *src) -{ - int l, rc = 0; - - /* Copy the MLS range from the source context */ - for (l = 0; l < 2; l++) { - dst->range.level[l].sens = src->range.level[l].sens; - rc = ebitmap_cpy(&dst->range.level[l].cat, - &src->range.level[l].cat); - if (rc) - break; - } - - return rc; -} - int mls_compute_context_len(struct context *context); void mls_sid_to_context(struct context *context, char **scontext); int mls_context_isvalid(struct policydb *p, struct context *c); diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c index ee0581557966498d91435600b2e208a9a411b9d0..372eaade3ca6637a26fd91cc16dd67726bde30b6 100644 --- a/security/selinux/ss/services.c +++ b/security/selinux/ss/services.c @@ -1916,11 +1916,10 @@ int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid) newcon.user = context1->user; newcon.role = context1->role; newcon.type = context1->type; - rc = mls_copy_context(&newcon, context2); + rc = mls_context_cpy(&newcon, context2); if (rc) goto out_unlock; - /* Check the validity of the new context. */ if (!policydb_context_isvalid(&policydb, &newcon)) { rc = convert_context_handle_invalid_context(&newcon);