am 311edc8c: Merge "Add SELinux restorecon calls on ASEC containers."
* commit '311edc8cb2dd5c86bad49f9696333874b400f9c4':
Add SELinux restorecon calls on ASEC containers.
diff --git a/VolumeManager.cpp b/VolumeManager.cpp
index 40f58fa..95263a8 100644
--- a/VolumeManager.cpp
+++ b/VolumeManager.cpp
@@ -211,6 +211,12 @@
int VolumeManager::getAsecMountPath(const char *id, char *buffer, int maxlen) {
char asecFileName[255];
+ if (!isLegalAsecId(id)) {
+ SLOGE("getAsecMountPath: Invalid asec id \"%s\"", id);
+ errno = EINVAL;
+ return -1;
+ }
+
if (findAsec(id, asecFileName, sizeof(asecFileName))) {
SLOGE("Couldn't find ASEC %s", id);
return -1;
@@ -235,6 +241,12 @@
int VolumeManager::getAsecFilesystemPath(const char *id, char *buffer, int maxlen) {
char asecFileName[255];
+ if (!isLegalAsecId(id)) {
+ SLOGE("getAsecFilesystemPath: Invalid asec id \"%s\"", id);
+ errno = EINVAL;
+ return -1;
+ }
+
if (findAsec(id, asecFileName, sizeof(asecFileName))) {
SLOGE("Couldn't find ASEC %s", id);
return -1;
@@ -260,6 +272,12 @@
struct asec_superblock sb;
memset(&sb, 0, sizeof(sb));
+ if (!isLegalAsecId(id)) {
+ SLOGE("createAsec: Invalid asec id \"%s\"", id);
+ errno = EINVAL;
+ return -1;
+ }
+
const bool wantFilesystem = strcmp(fstype, "none");
bool usingExt4 = false;
if (wantFilesystem) {
@@ -483,6 +501,12 @@
char loopDevice[255];
char mountPoint[255];
+ if (!isLegalAsecId(id)) {
+ SLOGE("finalizeAsec: Invalid asec id \"%s\"", id);
+ errno = EINVAL;
+ return -1;
+ }
+
if (findAsec(id, asecFileName, sizeof(asecFileName))) {
SLOGE("Couldn't find ASEC %s", id);
return -1;
@@ -540,6 +564,12 @@
return -1;
}
+ if (!isLegalAsecId(id)) {
+ SLOGE("fixupAsecPermissions: Invalid asec id \"%s\"", id);
+ errno = EINVAL;
+ return -1;
+ }
+
if (findAsec(id, asecFileName, sizeof(asecFileName))) {
SLOGE("Couldn't find ASEC %s", id);
return -1;
@@ -659,6 +689,18 @@
const char *dir;
+ if (!isLegalAsecId(id1)) {
+ SLOGE("renameAsec: Invalid asec id1 \"%s\"", id1);
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (!isLegalAsecId(id2)) {
+ SLOGE("renameAsec: Invalid asec id2 \"%s\"", id2);
+ errno = EINVAL;
+ return -1;
+ }
+
if (findAsec(id1, asecFilename1, sizeof(asecFilename1), &dir)) {
SLOGE("Couldn't find ASEC %s", id1);
return -1;
@@ -715,6 +757,12 @@
char asecFileName[255];
char mountPoint[255];
+ if (!isLegalAsecId(id)) {
+ SLOGE("unmountAsec: Invalid asec id \"%s\"", id);
+ errno = EINVAL;
+ return -1;
+ }
+
if (findAsec(id, asecFileName, sizeof(asecFileName))) {
SLOGE("Couldn't find ASEC %s", id);
return -1;
@@ -839,6 +887,12 @@
char asecFileName[255];
char mountPoint[255];
+ if (!isLegalAsecId(id)) {
+ SLOGE("destroyAsec: Invalid asec id \"%s\"", id);
+ errno = EINVAL;
+ return -1;
+ }
+
if (findAsec(id, asecFileName, sizeof(asecFileName))) {
SLOGE("Couldn't find ASEC %s", id);
return -1;
@@ -871,6 +925,38 @@
return 0;
}
+/*
+ * Legal ASEC ids consist of alphanumeric characters, '-',
+ * '_', or '.'. ".." is not allowed. The first or last character
+ * of the ASEC id cannot be '.' (dot).
+ */
+bool VolumeManager::isLegalAsecId(const char *id) const {
+ size_t i;
+ size_t len = strlen(id);
+
+ if (len == 0) {
+ return false;
+ }
+ if ((id[0] == '.') || (id[len - 1] == '.')) {
+ return false;
+ }
+
+ for (i = 0; i < len; i++) {
+ if (id[i] == '.') {
+ // i=0 is guaranteed never to have a dot. See above.
+ if (id[i-1] == '.') return false;
+ continue;
+ }
+ if (id[i] == '_' || id[i] == '-') continue;
+ if (id[i] >= 'a' && id[i] <= 'z') continue;
+ if (id[i] >= 'A' && id[i] <= 'Z') continue;
+ if (id[i] >= '0' && id[i] <= '9') continue;
+ return false;
+ }
+
+ return true;
+}
+
bool VolumeManager::isAsecInDirectory(const char *dir, const char *asecName) const {
int dirfd = open(dir, O_DIRECTORY);
if (dirfd < 0) {
@@ -895,6 +981,12 @@
const int idLen = strlen(id);
char *asecName;
+ if (!isLegalAsecId(id)) {
+ SLOGE("findAsec: Invalid asec id \"%s\"", id);
+ errno = EINVAL;
+ return -1;
+ }
+
if (asprintf(&asecName, "%s.asec", id) < 0) {
SLOGE("Couldn't allocate string to write ASEC name");
return -1;
@@ -931,6 +1023,12 @@
char asecFileName[255];
char mountPoint[255];
+ if (!isLegalAsecId(id)) {
+ SLOGE("mountAsec: Invalid asec id \"%s\"", id);
+ errno = EINVAL;
+ return -1;
+ }
+
if (findAsec(id, asecFileName, sizeof(asecFileName))) {
SLOGE("Couldn't find ASEC %s", id);
return -1;
diff --git a/VolumeManager.h b/VolumeManager.h
index 9d69d6a..cc8958d 100644
--- a/VolumeManager.h
+++ b/VolumeManager.h
@@ -154,6 +154,7 @@
void readInitialState();
bool isMountpointMounted(const char *mp);
bool isAsecInDirectory(const char *dir, const char *asec) const;
+ bool isLegalAsecId(const char *id) const;
};
extern "C" {