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authorEric Paris <eparis@redhat.com>2010-07-21 12:51:03 -0400
committerJames Morris <jmorris@namei.org>2010-08-02 01:35:06 -0400
commit692a8a231b212dfc68f612956d63f34abf098e0f (patch)
tree4af3c03535ebc49e38c3c0c8f67061adbdf44c72 /security
parentd1b43547e56b163bc5c622243c47d8a13626175b (diff)
SELinux: break ocontext reading into a separate function
Move the reading of ocontext type data out of policydb_read() in a separate function ocontext_read() Signed-off-by: Eric Paris <eparis@redhat.com> Acked-by: Stephen D. Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/ss/policydb.c244
1 files changed, 133 insertions, 111 deletions
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 4ea073eaf8bf..674ddfe0ba03 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -1901,6 +1901,136 @@ out:
1901 return rc; 1901 return rc;
1902} 1902}
1903 1903
1904static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
1905 void *fp)
1906{
1907 int i, j, rc;
1908 u32 nel, len;
1909 __le32 buf[3];
1910 struct ocontext *l, *c;
1911 u32 nodebuf[8];
1912
1913 for (i = 0; i < info->ocon_num; i++) {
1914 rc = next_entry(buf, fp, sizeof(u32));
1915 if (rc)
1916 goto out;
1917 nel = le32_to_cpu(buf[0]);
1918
1919 l = NULL;
1920 for (j = 0; j < nel; j++) {
1921 rc = -ENOMEM;
1922 c = kzalloc(sizeof(*c), GFP_KERNEL);
1923 if (!c)
1924 goto out;
1925 if (l)
1926 l->next = c;
1927 else
1928 p->ocontexts[i] = c;
1929 l = c;
1930
1931 switch (i) {
1932 case OCON_ISID:
1933 rc = next_entry(buf, fp, sizeof(u32));
1934 if (rc)
1935 goto out;
1936
1937 c->sid[0] = le32_to_cpu(buf[0]);
1938 rc = context_read_and_validate(&c->context[0], p, fp);
1939 if (rc)
1940 goto out;
1941 break;
1942 case OCON_FS:
1943 case OCON_NETIF:
1944 rc = next_entry(buf, fp, sizeof(u32));
1945 if (rc)
1946 goto out;
1947 len = le32_to_cpu(buf[0]);
1948
1949 rc = -ENOMEM;
1950 c->u.name = kmalloc(len + 1, GFP_KERNEL);
1951 if (!c->u.name)
1952 goto out;
1953
1954 rc = next_entry(c->u.name, fp, len);
1955 if (rc)
1956 goto out;
1957
1958 c->u.name[len] = 0;
1959 rc = context_read_and_validate(&c->context[0], p, fp);
1960 if (rc)
1961 goto out;
1962 rc = context_read_and_validate(&c->context[1], p, fp);
1963 if (rc)
1964 goto out;
1965 break;
1966 case OCON_PORT:
1967 rc = next_entry(buf, fp, sizeof(u32)*3);
1968 if (rc)
1969 goto out;
1970 c->u.port.protocol = le32_to_cpu(buf[0]);
1971 c->u.port.low_port = le32_to_cpu(buf[1]);
1972 c->u.port.high_port = le32_to_cpu(buf[2]);
1973 rc = context_read_and_validate(&c->context[0], p, fp);
1974 if (rc)
1975 goto out;
1976 break;
1977 case OCON_NODE:
1978 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
1979 if (rc)
1980 goto out;
1981 c->u.node.addr = nodebuf[0]; /* network order */
1982 c->u.node.mask = nodebuf[1]; /* network order */
1983 rc = context_read_and_validate(&c->context[0], p, fp);
1984 if (rc)
1985 goto out;
1986 break;
1987 case OCON_FSUSE:
1988 rc = next_entry(buf, fp, sizeof(u32)*2);
1989 if (rc)
1990 goto out;
1991
1992 rc = -EINVAL;
1993 c->v.behavior = le32_to_cpu(buf[0]);
1994 if (c->v.behavior > SECURITY_FS_USE_NONE)
1995 goto out;
1996
1997 rc = -ENOMEM;
1998 len = le32_to_cpu(buf[1]);
1999 c->u.name = kmalloc(len + 1, GFP_KERNEL);
2000 if (!c->u.name)
2001 goto out;
2002
2003 rc = next_entry(c->u.name, fp, len);
2004 if (rc)
2005 goto out;
2006 c->u.name[len] = 0;
2007 rc = context_read_and_validate(&c->context[0], p, fp);
2008 if (rc)
2009 goto out;
2010 break;
2011 case OCON_NODE6: {
2012 int k;
2013
2014 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2015 if (rc)
2016 goto out;
2017 for (k = 0; k < 4; k++)
2018 c->u.node6.addr[k] = nodebuf[k];
2019 for (k = 0; k < 4; k++)
2020 c->u.node6.mask[k] = nodebuf[k+4];
2021 rc = context_read_and_validate(&c->context[0], p, fp);
2022 if (rc)
2023 goto out;
2024 break;
2025 }
2026 }
2027 }
2028 }
2029 rc = 0;
2030out:
2031 return rc;
2032}
2033
1904/* 2034/*
1905 * Read the configuration data from a policy database binary 2035 * Read the configuration data from a policy database binary
1906 * representation file into a policy database structure. 2036 * representation file into a policy database structure.
@@ -1909,10 +2039,8 @@ int policydb_read(struct policydb *p, void *fp)
1909{ 2039{
1910 struct role_allow *ra, *lra; 2040 struct role_allow *ra, *lra;
1911 struct role_trans *tr, *ltr; 2041 struct role_trans *tr, *ltr;
1912 struct ocontext *l, *c;
1913 int i, j, rc; 2042 int i, j, rc;
1914 __le32 buf[4]; 2043 __le32 buf[4];
1915 u32 nodebuf[8];
1916 u32 len, nprim, nel; 2044 u32 len, nprim, nel;
1917 2045
1918 char *policydb_str; 2046 char *policydb_str;
@@ -2117,115 +2245,9 @@ int policydb_read(struct policydb *p, void *fp)
2117 if (!p->process_trans_perms) 2245 if (!p->process_trans_perms)
2118 goto bad; 2246 goto bad;
2119 2247
2120 for (i = 0; i < info->ocon_num; i++) { 2248 rc = ocontext_read(p, info, fp);
2121 rc = next_entry(buf, fp, sizeof(u32)); 2249 if (rc)
2122 if (rc < 0) 2250 goto bad;
2123 goto bad;
2124 nel = le32_to_cpu(buf[0]);
2125 l = NULL;
2126 for (j = 0; j < nel; j++) {
2127 c = kzalloc(sizeof(*c), GFP_KERNEL);
2128 if (!c) {
2129 rc = -ENOMEM;
2130 goto bad;
2131 }
2132 if (l)
2133 l->next = c;
2134 else
2135 p->ocontexts[i] = c;
2136 l = c;
2137 rc = -EINVAL;
2138 switch (i) {
2139 case OCON_ISID:
2140 rc = next_entry(buf, fp, sizeof(u32));
2141 if (rc < 0)
2142 goto bad;
2143 c->sid[0] = le32_to_cpu(buf[0]);
2144 rc = context_read_and_validate(&c->context[0], p, fp);
2145 if (rc)
2146 goto bad;
2147 break;
2148 case OCON_FS:
2149 case OCON_NETIF:
2150 rc = next_entry(buf, fp, sizeof(u32));
2151 if (rc < 0)
2152 goto bad;
2153 len = le32_to_cpu(buf[0]);
2154 c->u.name = kmalloc(len + 1, GFP_KERNEL);
2155 if (!c->u.name) {
2156 rc = -ENOMEM;
2157 goto bad;
2158 }
2159 rc = next_entry(c->u.name, fp, len);
2160 if (rc < 0)
2161 goto bad;
2162 c->u.name[len] = 0;
2163 rc = context_read_and_validate(&c->context[0], p, fp);
2164 if (rc)
2165 goto bad;
2166 rc = context_read_and_validate(&c->context[1], p, fp);
2167 if (rc)
2168 goto bad;
2169 break;
2170 case OCON_PORT:
2171 rc = next_entry(buf, fp, sizeof(u32)*3);
2172 if (rc < 0)
2173 goto bad;
2174 c->u.port.protocol = le32_to_cpu(buf[0]);
2175 c->u.port.low_port = le32_to_cpu(buf[1]);
2176 c->u.port.high_port = le32_to_cpu(buf[2]);
2177 rc = context_read_and_validate(&c->context[0], p, fp);
2178 if (rc)
2179 goto bad;
2180 break;
2181 case OCON_NODE:
2182 rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
2183 if (rc < 0)
2184 goto bad;
2185 c->u.node.addr = nodebuf[0]; /* network order */
2186 c->u.node.mask = nodebuf[1]; /* network order */
2187 rc = context_read_and_validate(&c->context[0], p, fp);
2188 if (rc)
2189 goto bad;
2190 break;
2191 case OCON_FSUSE:
2192 rc = next_entry(buf, fp, sizeof(u32)*2);
2193 if (rc < 0)
2194 goto bad;
2195 c->v.behavior = le32_to_cpu(buf[0]);
2196 if (c->v.behavior > SECURITY_FS_USE_NONE)
2197 goto bad;
2198 len = le32_to_cpu(buf[1]);
2199 c->u.name = kmalloc(len + 1, GFP_KERNEL);
2200 if (!c->u.name) {
2201 rc = -ENOMEM;
2202 goto bad;
2203 }
2204 rc = next_entry(c->u.name, fp, len);
2205 if (rc < 0)
2206 goto bad;
2207 c->u.name[len] = 0;
2208 rc = context_read_and_validate(&c->context[0], p, fp);
2209 if (rc)
2210 goto bad;
2211 break;
2212 case OCON_NODE6: {
2213 int k;
2214
2215 rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
2216 if (rc < 0)
2217 goto bad;
2218 for (k = 0; k < 4; k++)
2219 c->u.node6.addr[k] = nodebuf[k];
2220 for (k = 0; k < 4; k++)
2221 c->u.node6.mask[k] = nodebuf[k+4];
2222 if (context_read_and_validate(&c->context[0], p, fp))
2223 goto bad;
2224 break;
2225 }
2226 }
2227 }
2228 }
2229 2251
2230 rc = genfs_read(p, fp); 2252 rc = genfs_read(p, fp);
2231 if (rc) 2253 if (rc)
generated by cgit v1.2.2 (git 2.25.0) at 2024-09-28 09:27:27 -0400