@@ -165,9 +165,9 @@ DEFINE_CEPH_FEATURE(58, 1, FS_FILE_LAYOUT_V2) // overlap
DEFINE_CEPH_FEATURE(59, 1, FS_BTIME)
DEFINE_CEPH_FEATURE(59, 1, FS_CHANGE_ATTR) // overlap
DEFINE_CEPH_FEATURE(59, 1, MSG_ADDR2) // overlap
-DEFINE_CEPH_FEATURE(60, 1, BLKIN_TRACING) // *do not share this bit*
+DEFINE_CEPH_FEATURE(60, 1, OSD_RECOVERY_DELETES) // *do not share this bit*
+DEFINE_CEPH_FEATURE(61, 1, CEPHX_V2) // *do not share this bit*
-DEFINE_CEPH_FEATURE(61, 1, RESERVED2) // unused, but slow down!
DEFINE_CEPH_FEATURE(62, 1, RESERVED) // do not use; used as a sentinal
DEFINE_CEPH_FEATURE_DEPRECATED(63, 1, RESERVED_BROKEN, LUMINOUS) // client-facing
@@ -210,7 +210,8 @@ DEFINE_CEPH_FEATURE_DEPRECATED(63, 1, RESERVED_BROKEN, LUMINOUS) // client-facin
CEPH_FEATURE_SERVER_JEWEL | \
CEPH_FEATURE_MON_STATEFUL_SUB | \
CEPH_FEATURE_CRUSH_TUNABLES5 | \
- CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING)
+ CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING | \
+ CEPH_FEATURE_CEPHX_V2)
#define CEPH_FEATURES_REQUIRED_DEFAULT \
(CEPH_FEATURE_NOSRCADDR | \
@@ -9,6 +9,7 @@
#include <linux/ceph/decode.h>
#include <linux/ceph/auth.h>
+#include <linux/ceph/ceph_features.h>
#include <linux/ceph/libceph.h>
#include <linux/ceph/messenger.h>
@@ -803,26 +804,64 @@ static int calc_signature(struct ceph_x_authorizer *au, struct ceph_msg *msg,
__le64 *psig)
{
void *enc_buf = au->enc_buf;
- struct {
- __le32 len;
- __le32 header_crc;
- __le32 front_crc;
- __le32 middle_crc;
- __le32 data_crc;
- } __packed *sigblock = enc_buf + ceph_x_encrypt_offset();
int ret;
- sigblock->len = cpu_to_le32(4*sizeof(u32));
- sigblock->header_crc = msg->hdr.crc;
- sigblock->front_crc = msg->footer.front_crc;
- sigblock->middle_crc = msg->footer.middle_crc;
- sigblock->data_crc = msg->footer.data_crc;
- ret = ceph_x_encrypt(&au->session_key, enc_buf, CEPHX_AU_ENC_BUF_LEN,
- sizeof(*sigblock));
- if (ret < 0)
- return ret;
+ if (!CEPH_HAVE_FEATURE(msg->con->peer_features, CEPHX_V2)) {
+ struct {
+ __le32 len;
+ __le32 header_crc;
+ __le32 front_crc;
+ __le32 middle_crc;
+ __le32 data_crc;
+ } __packed *sigblock = enc_buf + ceph_x_encrypt_offset();
+
+ sigblock->len = cpu_to_le32(4*sizeof(u32));
+ sigblock->header_crc = msg->hdr.crc;
+ sigblock->front_crc = msg->footer.front_crc;
+ sigblock->middle_crc = msg->footer.middle_crc;
+ sigblock->data_crc = msg->footer.data_crc;
+
+ ret = ceph_x_encrypt(&au->session_key, enc_buf,
+ CEPHX_AU_ENC_BUF_LEN, sizeof(*sigblock));
+ if (ret < 0)
+ return ret;
+
+ *psig = *(__le64 *)(enc_buf + sizeof(u32));
+ } else {
+ struct {
+ __le32 header_crc;
+ __le32 front_crc;
+ __le32 front_len;
+ __le32 middle_crc;
+ __le32 middle_len;
+ __le32 data_crc;
+ __le32 data_len;
+ __le32 seq_lower_word;
+ } __packed *sigblock = enc_buf;
+ struct {
+ __le64 a, b, c, d;
+ } __packed *penc = enc_buf;
+ int ciphertext_len;
+
+ sigblock->header_crc = msg->hdr.crc;
+ sigblock->front_crc = msg->footer.front_crc;
+ sigblock->front_len = msg->hdr.front_len;
+ sigblock->middle_crc = msg->footer.middle_crc;
+ sigblock->middle_len = msg->hdr.middle_len;
+ sigblock->data_crc = msg->footer.data_crc;
+ sigblock->data_len = msg->hdr.data_len;
+ sigblock->seq_lower_word = *(__le32 *)&msg->hdr.seq;
+
+ /* no leading len, no ceph_x_encrypt_header */
+ ret = ceph_crypt(&au->session_key, true, enc_buf,
+ CEPHX_AU_ENC_BUF_LEN, sizeof(*sigblock),
+ &ciphertext_len);
+ if (ret)
+ return ret;
+
+ *psig = penc->a ^ penc->b ^ penc->c ^ penc->d;
+ }
- *psig = *(__le64 *)(enc_buf + sizeof(u32));
return 0;
}
Derive the signature from the entire buffer (both AES cipher blocks) instead of using just the first half of the first block, leaving out data_crc entirely. This addresses CVE-2018-1129. Link: http://tracker.ceph.com/issues/24837 Signed-off-by: Ilya Dryomov <idryomov@gmail.com> --- include/linux/ceph/ceph_features.h | 7 ++-- net/ceph/auth_x.c | 73 +++++++++++++++++++++++++++++--------- 2 files changed, 60 insertions(+), 20 deletions(-)