diff options
Diffstat (limited to 'security/selinux/ss/policydb.c')
| -rw-r--r-- | security/selinux/ss/policydb.c | 132 |
1 files changed, 129 insertions, 3 deletions
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c index 57363562f0f..7102457661d 100644 --- a/security/selinux/ss/policydb.c +++ b/security/selinux/ss/policydb.c @@ -123,6 +123,11 @@ static struct policydb_compat_info policydb_compat[] = { .sym_num = SYM_NUM, .ocon_num = OCON_NUM, }, + { + .version = POLICYDB_VERSION_FILENAME_TRANS, + .sym_num = SYM_NUM, + .ocon_num = OCON_NUM, + }, }; static struct policydb_compat_info *policydb_lookup_compat(int version) @@ -497,7 +502,7 @@ static int policydb_index(struct policydb *p) goto out; rc = flex_array_prealloc(p->type_val_to_struct_array, 0, - p->p_types.nprim - 1, GFP_KERNEL | __GFP_ZERO); + p->p_types.nprim, GFP_KERNEL | __GFP_ZERO); if (rc) goto out; @@ -514,7 +519,7 @@ static int policydb_index(struct policydb *p) goto out; rc = flex_array_prealloc(p->sym_val_to_name[i], - 0, p->symtab[i].nprim - 1, + 0, p->symtab[i].nprim, GFP_KERNEL | __GFP_ZERO); if (rc) goto out; @@ -704,6 +709,7 @@ void policydb_destroy(struct policydb *p) int i; struct role_allow *ra, *lra = NULL; struct role_trans *tr, *ltr = NULL; + struct filename_trans *ft, *nft; for (i = 0; i < SYM_NUM; i++) { cond_resched(); @@ -781,6 +787,15 @@ void policydb_destroy(struct policydb *p) } flex_array_free(p->type_attr_map_array); } + + ft = p->filename_trans; + while (ft) { + nft = ft->next; + kfree(ft->name); + kfree(ft); + ft = nft; + } + ebitmap_destroy(&p->policycaps); ebitmap_destroy(&p->permissive_map); @@ -1788,6 +1803,72 @@ out: return rc; } +static int filename_trans_read(struct policydb *p, void *fp) +{ + struct filename_trans *ft, *last; + u32 nel, len; + char *name; + __le32 buf[4]; + int rc, i; + + if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS) + return 0; + + rc = next_entry(buf, fp, sizeof(u32)); + if (rc) + goto out; + nel = le32_to_cpu(buf[0]); + + last = p->filename_trans; + while (last && last->next) + last = last->next; + + for (i = 0; i < nel; i++) { + rc = -ENOMEM; + ft = kzalloc(sizeof(*ft), GFP_KERNEL); + if (!ft) + goto out; + + /* add it to the tail of the list */ + if (!last) + p->filename_trans = ft; + else + last->next = ft; + last = ft; + + /* length of the path component string */ + rc = next_entry(buf, fp, sizeof(u32)); + if (rc) + goto out; + len = le32_to_cpu(buf[0]); + + rc = -ENOMEM; + name = kmalloc(len + 1, GFP_KERNEL); + if (!name) + goto out; + + ft->name = name; + + /* path component string */ + rc = next_entry(name, fp, len); + if (rc) + goto out; + name[len] = 0; + + rc = next_entry(buf, fp, sizeof(u32) * 4); + if (rc) + goto out; + + ft->stype = le32_to_cpu(buf[0]); + ft->ttype = le32_to_cpu(buf[1]); + ft->tclass = le32_to_cpu(buf[2]); + ft->otype = le32_to_cpu(buf[3]); + } + rc = 0; +out: + return rc; +} + static int genfs_read(struct policydb *p, void *fp) { int i, j, rc; @@ -2251,6 +2332,10 @@ int policydb_read(struct policydb *p, void *fp) lra = ra; } + rc = filename_trans_read(p, fp); + if (rc) + goto bad; + rc = policydb_index(p); if (rc) goto bad; @@ -2286,7 +2371,7 @@ int policydb_read(struct policydb *p, void *fp) goto bad; /* preallocate so we don't have to worry about the put ever failing */ - rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim - 1, + rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim, GFP_KERNEL | __GFP_ZERO); if (rc) goto bad; @@ -3025,6 +3110,43 @@ static int range_write(struct policydb *p, void *fp) return 0; } +static int filename_trans_write(struct policydb *p, void *fp) +{ + struct filename_trans *ft; + u32 len, nel = 0; + __le32 buf[4]; + int rc; + + for (ft = p->filename_trans; ft; ft = ft->next) + nel++; + + buf[0] = cpu_to_le32(nel); + rc = put_entry(buf, sizeof(u32), 1, fp); + if (rc) + return rc; + + for (ft = p->filename_trans; ft; ft = ft->next) { + len = strlen(ft->name); + buf[0] = cpu_to_le32(len); + rc = put_entry(buf, sizeof(u32), 1, fp); + if (rc) + return rc; + + rc = put_entry(ft->name, sizeof(char), len, fp); + if (rc) + return rc; + + buf[0] = ft->stype; + buf[1] = ft->ttype; + buf[2] = ft->tclass; + buf[3] = ft->otype; + + rc = put_entry(buf, sizeof(u32), 4, fp); + if (rc) + return rc; + } + return 0; +} /* * Write the configuration data in a policy database * structure to a policy database binary representation @@ -3135,6 +3257,10 @@ int policydb_write(struct policydb *p, void *fp) if (rc) return rc; + rc = filename_trans_write(p, fp); + if (rc) + return rc; + rc = ocontext_write(p, info, fp); if (rc) return rc; |