From 0efc61eaee5471acd7399c8536feff280b4966dd Mon Sep 17 00:00:00 2001 From: Venkat Yekkirala Date: Tue, 12 Dec 2006 13:02:41 -0600 Subject: [PATCH] selinux: Delete mls_copy_context This deletes mls_copy_context() in favor of mls_context_cpy() and replaces mls_scopy_context() with mls_context_cpy_low(). Signed-off-by: Venkat Yekkirala Acked-by: Stephen Smalley Signed-off-by: James Morris --- security/selinux/ss/context.h | 23 +++++++++++++++++++++++ security/selinux/ss/mls.c | 30 +++++------------------------- security/selinux/ss/mls.h | 20 -------------------- security/selinux/ss/services.c | 3 +-- 4 files changed, 29 insertions(+), 47 deletions(-) diff --git a/security/selinux/ss/context.h b/security/selinux/ss/context.h index 0562bacb7b99..2eee0dab524d 100644 --- a/security/selinux/ss/context.h +++ b/security/selinux/ss/context.h @@ -55,6 +55,29 @@ out: 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 b4f682dc13ff..4a8bab2f3c71 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 661d6fc76966..096d1b4ef7fb 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 ee0581557966..372eaade3ca6 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); -- 2.30.2