archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-19 02:24:40 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8226406: JVM fails to detect mismatched or corrupt CDS archive

Browse source 
Check important archive header fields such as _jvm_ident before processing other fields.

Reviewed-by: iklam, jiangli
This commit is contained in:
Calvin Cheung 2019-07-12 08:40:37 -07:00
parent cca67cab99
commit a6b4e5c3d1
4 changed files with 143 additions and 55 deletions
Download patch file Download diff file Expand all files Collapse all files

83
src/hotspot/share/memory/filemap.cpp
View file

@ -155,6 +155,8 @@ template <int N> static void get_header_version(char (&header_version) [N]) {
const char *vm_version = VM_Version::internal_vm_info_string();
const int version_len = (int)strlen(vm_version);
memset(header_version, 0, JVM_IDENT_MAX);
if (version_len < (JVM_IDENT_MAX-1)) {
strcpy(header_version, vm_version);
@ -170,6 +172,8 @@ template <int N> static void get_header_version(char (&header_version) [N]) {
sprintf(&header_version[JVM_IDENT_MAX-9], "%08x", hash);
header_version[JVM_IDENT_MAX-1] = 0; // Null terminate.
}
assert(header_version[JVM_IDENT_MAX-1] == 0, "must be");
}
FileMapInfo::FileMapInfo(bool is_static) {
@ -730,10 +734,59 @@ bool FileMapInfo::init_from_file(int fd, bool is_static) {
fail_continue("Unable to read the file header.");
return false;
}
if (!Arguments::has_jimage()) {
FileMapInfo::fail_continue("The shared archive file cannot be used with an exploded module build.");
return false;
}
unsigned int expected_magic = is_static ? CDS_ARCHIVE_MAGIC : CDS_DYNAMIC_ARCHIVE_MAGIC;
if (_header->_magic != expected_magic) {
log_info(cds)("_magic expected: 0x%08x", expected_magic);
log_info(cds)(" actual: 0x%08x", _header->_magic);
FileMapInfo::fail_continue("The shared archive file has a bad magic number.");
return false;
}
if (_header->_version != CURRENT_CDS_ARCHIVE_VERSION) {
log_info(cds)("_version expected: %d", CURRENT_CDS_ARCHIVE_VERSION);
log_info(cds)(" actual: %d", _header->_version);
fail_continue("The shared archive file has the wrong version.");
return false;
}
if (_header->_header_size != sz) {
log_info(cds)("_header_size expected: " SIZE_FORMAT, sz);
log_info(cds)(" actual: " SIZE_FORMAT, _header->_header_size);
FileMapInfo::fail_continue("The shared archive file has an incorrect header size.");
return false;
}
if (_header->_jvm_ident[JVM_IDENT_MAX-1] != 0) {
FileMapInfo::fail_continue("JVM version identifier is corrupted.");
return false;
}
char header_version[JVM_IDENT_MAX];
get_header_version(header_version);
if (strncmp(_header->_jvm_ident, header_version, JVM_IDENT_MAX-1) != 0) {
log_info(cds)("_jvm_ident expected: %s", header_version);
log_info(cds)(" actual: %s", _header->_jvm_ident);
FileMapInfo::fail_continue("The shared archive file was created by a different"
" version or build of HotSpot");
return false;
}
if (VerifySharedSpaces) {
int expected_crc = _header->compute_crc();
if (expected_crc != _header->_crc) {
log_info(cds)("_crc expected: %d", expected_crc);
log_info(cds)(" actual: %d", _header->_crc);
FileMapInfo::fail_continue("Header checksum verification failed.");
return false;
}
}
_file_offset = n;
size_t info_size = _header->_paths_misc_info_size;
@ -748,10 +801,6 @@ bool FileMapInfo::init_from_file(int fd, bool is_static) {
_file_offset += n + _header->_base_archive_name_size; // accounts for the size of _base_archive_name
if (is_static) {
if (_header->_magic != CDS_ARCHIVE_MAGIC) {
fail_continue("Incorrect static archive magic number");
return false;
}
// just checking the last region is sufficient since the archive is written
// in sequential order
size_t len = lseek(fd, 0, SEEK_END);
@ -1589,33 +1638,7 @@ int FileMapHeader::compute_crc() {
// This function should only be called during run time with UseSharedSpaces enabled.
bool FileMapHeader::validate() {
if (VerifySharedSpaces && compute_crc() != _crc) {
FileMapInfo::fail_continue("Header checksum verification failed.");
return false;
}
if (!Arguments::has_jimage()) {
FileMapInfo::fail_continue("The shared archive file cannot be used with an exploded module build.");
return false;
}
if (_version != CURRENT_CDS_ARCHIVE_VERSION) {
FileMapInfo::fail_continue("The shared archive file is the wrong version.");
return false;
}
if (_magic != CDS_ARCHIVE_MAGIC && _magic != CDS_DYNAMIC_ARCHIVE_MAGIC) {
FileMapInfo::fail_continue("The shared archive file has a bad magic number.");
return false;
}
char header_version[JVM_IDENT_MAX];
get_header_version(header_version);
if (strncmp(_jvm_ident, header_version, JVM_IDENT_MAX-1) != 0) {
log_info(class, path)("expected: %s", header_version);
log_info(class, path)("actual: %s", _jvm_ident);
FileMapInfo::fail_continue("The shared archive file was created by a different"
" version or build of HotSpot");
return false;
}
if (_obj_alignment != ObjectAlignmentInBytes) {
FileMapInfo::fail_continue("The shared archive file's ObjectAlignmentInBytes of %d"
" does not equal the current ObjectAlignmentInBytes of " INTX_FORMAT ".",