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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph fixes from Sage Weil: "The main thing here is a set of three patches that fix a buffer overrun for large authentication tickets (sigh). There is also a trivial warning fix and an error path fix that are both regressions" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: libceph: do not hard code max auth ticket len libceph: add process_one_ticket() helper libceph: gracefully handle large reply messages from the mon rbd: fix error return code in rbd_dev_device_setup() rbd: avoid format-security warning inside alloc_workqueue()
This commit is contained in:
Linus Torvalds
commit
c73f6fdf2f
@ -5087,9 +5087,11 @@ static int rbd_dev_device_setup(struct rbd_device *rbd_dev)
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set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);
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set_disk_ro(rbd_dev->disk, rbd_dev->mapping.read_only);
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rbd_dev->rq_wq = alloc_workqueue(rbd_dev->disk->disk_name, 0, 0);
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if (!rbd_dev->rq_wq)
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rbd_dev->rq_wq = alloc_workqueue("%s", 0, 0, rbd_dev->disk->disk_name);
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if (!rbd_dev->rq_wq) {
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ret = -ENOMEM;
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goto err_out_mapping;
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}
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ret = rbd_bus_add_dev(rbd_dev);
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if (ret)
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@ -13,8 +13,6 @@
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#include "auth_x.h"
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#include "auth_x_protocol.h"
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#define TEMP_TICKET_BUF_LEN 256
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static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed);
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static int ceph_x_is_authenticated(struct ceph_auth_client *ac)
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@ -64,7 +62,7 @@ static int ceph_x_encrypt(struct ceph_crypto_key *secret,
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}
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static int ceph_x_decrypt(struct ceph_crypto_key *secret,
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void **p, void *end, void *obuf, size_t olen)
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void **p, void *end, void **obuf, size_t olen)
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{
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struct ceph_x_encrypt_header head;
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size_t head_len = sizeof(head);
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@ -75,8 +73,14 @@ static int ceph_x_decrypt(struct ceph_crypto_key *secret,
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return -EINVAL;
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dout("ceph_x_decrypt len %d\n", len);
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ret = ceph_decrypt2(secret, &head, &head_len, obuf, &olen,
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*p, len);
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if (*obuf == NULL) {
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*obuf = kmalloc(len, GFP_NOFS);
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if (!*obuf)
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return -ENOMEM;
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olen = len;
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}
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ret = ceph_decrypt2(secret, &head, &head_len, *obuf, &olen, *p, len);
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if (ret)
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return ret;
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if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC)
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@ -129,139 +133,120 @@ static void remove_ticket_handler(struct ceph_auth_client *ac,
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kfree(th);
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}
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static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
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struct ceph_crypto_key *secret,
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void *buf, void *end)
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static int process_one_ticket(struct ceph_auth_client *ac,
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struct ceph_crypto_key *secret,
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void **p, void *end)
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{
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struct ceph_x_info *xi = ac->private;
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int num;
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void *p = buf;
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int type;
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u8 tkt_struct_v, blob_struct_v;
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struct ceph_x_ticket_handler *th;
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void *dbuf = NULL;
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void *dp, *dend;
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int dlen;
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char is_enc;
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struct timespec validity;
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struct ceph_crypto_key old_key;
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void *ticket_buf = NULL;
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void *tp, *tpend;
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struct ceph_timespec new_validity;
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struct ceph_crypto_key new_session_key;
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struct ceph_buffer *new_ticket_blob;
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unsigned long new_expires, new_renew_after;
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u64 new_secret_id;
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int ret;
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char *dbuf;
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char *ticket_buf;
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u8 reply_struct_v;
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dbuf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
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if (!dbuf)
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return -ENOMEM;
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ceph_decode_need(p, end, sizeof(u32) + 1, bad);
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ret = -ENOMEM;
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ticket_buf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);
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if (!ticket_buf)
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goto out_dbuf;
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type = ceph_decode_32(p);
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dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));
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ceph_decode_need(&p, end, 1 + sizeof(u32), bad);
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reply_struct_v = ceph_decode_8(&p);
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if (reply_struct_v != 1)
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tkt_struct_v = ceph_decode_8(p);
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if (tkt_struct_v != 1)
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goto bad;
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num = ceph_decode_32(&p);
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dout("%d tickets\n", num);
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while (num--) {
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int type;
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u8 tkt_struct_v, blob_struct_v;
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struct ceph_x_ticket_handler *th;
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void *dp, *dend;
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int dlen;
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char is_enc;
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struct timespec validity;
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struct ceph_crypto_key old_key;
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void *tp, *tpend;
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struct ceph_timespec new_validity;
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struct ceph_crypto_key new_session_key;
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struct ceph_buffer *new_ticket_blob;
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unsigned long new_expires, new_renew_after;
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u64 new_secret_id;
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ceph_decode_need(&p, end, sizeof(u32) + 1, bad);
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th = get_ticket_handler(ac, type);
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if (IS_ERR(th)) {
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ret = PTR_ERR(th);
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goto out;
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}
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type = ceph_decode_32(&p);
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dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));
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/* blob for me */
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dlen = ceph_x_decrypt(secret, p, end, &dbuf, 0);
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if (dlen <= 0) {
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ret = dlen;
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goto out;
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}
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dout(" decrypted %d bytes\n", dlen);
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dp = dbuf;
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dend = dp + dlen;
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tkt_struct_v = ceph_decode_8(&p);
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if (tkt_struct_v != 1)
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goto bad;
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tkt_struct_v = ceph_decode_8(&dp);
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if (tkt_struct_v != 1)
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goto bad;
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th = get_ticket_handler(ac, type);
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if (IS_ERR(th)) {
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ret = PTR_ERR(th);
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goto out;
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}
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memcpy(&old_key, &th->session_key, sizeof(old_key));
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ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
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if (ret)
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goto out;
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/* blob for me */
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dlen = ceph_x_decrypt(secret, &p, end, dbuf,
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TEMP_TICKET_BUF_LEN);
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if (dlen <= 0) {
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ceph_decode_copy(&dp, &new_validity, sizeof(new_validity));
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ceph_decode_timespec(&validity, &new_validity);
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new_expires = get_seconds() + validity.tv_sec;
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new_renew_after = new_expires - (validity.tv_sec / 4);
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dout(" expires=%lu renew_after=%lu\n", new_expires,
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new_renew_after);
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/* ticket blob for service */
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ceph_decode_8_safe(p, end, is_enc, bad);
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if (is_enc) {
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/* encrypted */
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dout(" encrypted ticket\n");
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dlen = ceph_x_decrypt(&old_key, p, end, &ticket_buf, 0);
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if (dlen < 0) {
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ret = dlen;
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goto out;
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}
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dout(" decrypted %d bytes\n", dlen);
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dend = dbuf + dlen;
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dp = dbuf;
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tkt_struct_v = ceph_decode_8(&dp);
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if (tkt_struct_v != 1)
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goto bad;
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memcpy(&old_key, &th->session_key, sizeof(old_key));
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ret = ceph_crypto_key_decode(&new_session_key, &dp, dend);
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if (ret)
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goto out;
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ceph_decode_copy(&dp, &new_validity, sizeof(new_validity));
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ceph_decode_timespec(&validity, &new_validity);
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new_expires = get_seconds() + validity.tv_sec;
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new_renew_after = new_expires - (validity.tv_sec / 4);
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dout(" expires=%lu renew_after=%lu\n", new_expires,
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new_renew_after);
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/* ticket blob for service */
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ceph_decode_8_safe(&p, end, is_enc, bad);
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tp = ticket_buf;
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if (is_enc) {
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/* encrypted */
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dout(" encrypted ticket\n");
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dlen = ceph_x_decrypt(&old_key, &p, end, ticket_buf,
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TEMP_TICKET_BUF_LEN);
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if (dlen < 0) {
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ret = dlen;
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goto out;
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}
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dlen = ceph_decode_32(&tp);
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} else {
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/* unencrypted */
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ceph_decode_32_safe(&p, end, dlen, bad);
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ceph_decode_need(&p, end, dlen, bad);
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ceph_decode_copy(&p, ticket_buf, dlen);
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}
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tpend = tp + dlen;
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dout(" ticket blob is %d bytes\n", dlen);
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ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad);
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blob_struct_v = ceph_decode_8(&tp);
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new_secret_id = ceph_decode_64(&tp);
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ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend);
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if (ret)
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dlen = ceph_decode_32(&tp);
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} else {
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/* unencrypted */
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ceph_decode_32_safe(p, end, dlen, bad);
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ticket_buf = kmalloc(dlen, GFP_NOFS);
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if (!ticket_buf) {
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ret = -ENOMEM;
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goto out;
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/* all is well, update our ticket */
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ceph_crypto_key_destroy(&th->session_key);
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if (th->ticket_blob)
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ceph_buffer_put(th->ticket_blob);
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th->session_key = new_session_key;
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th->ticket_blob = new_ticket_blob;
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th->validity = new_validity;
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th->secret_id = new_secret_id;
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th->expires = new_expires;
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th->renew_after = new_renew_after;
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dout(" got ticket service %d (%s) secret_id %lld len %d\n",
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type, ceph_entity_type_name(type), th->secret_id,
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(int)th->ticket_blob->vec.iov_len);
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xi->have_keys |= th->service;
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}
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tp = ticket_buf;
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ceph_decode_need(p, end, dlen, bad);
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ceph_decode_copy(p, ticket_buf, dlen);
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}
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tpend = tp + dlen;
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dout(" ticket blob is %d bytes\n", dlen);
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ceph_decode_need(&tp, tpend, 1 + sizeof(u64), bad);
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blob_struct_v = ceph_decode_8(&tp);
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new_secret_id = ceph_decode_64(&tp);
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ret = ceph_decode_buffer(&new_ticket_blob, &tp, tpend);
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if (ret)
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goto out;
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/* all is well, update our ticket */
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ceph_crypto_key_destroy(&th->session_key);
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if (th->ticket_blob)
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ceph_buffer_put(th->ticket_blob);
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th->session_key = new_session_key;
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th->ticket_blob = new_ticket_blob;
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th->validity = new_validity;
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th->secret_id = new_secret_id;
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th->expires = new_expires;
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th->renew_after = new_renew_after;
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dout(" got ticket service %d (%s) secret_id %lld len %d\n",
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type, ceph_entity_type_name(type), th->secret_id,
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(int)th->ticket_blob->vec.iov_len);
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xi->have_keys |= th->service;
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ret = 0;
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out:
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kfree(ticket_buf);
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out_dbuf:
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kfree(dbuf);
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return ret;
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@ -270,6 +255,34 @@ bad:
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goto out;
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}
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static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,
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struct ceph_crypto_key *secret,
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void *buf, void *end)
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{
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void *p = buf;
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u8 reply_struct_v;
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u32 num;
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int ret;
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ceph_decode_8_safe(&p, end, reply_struct_v, bad);
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if (reply_struct_v != 1)
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return -EINVAL;
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ceph_decode_32_safe(&p, end, num, bad);
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dout("%d tickets\n", num);
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while (num--) {
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ret = process_one_ticket(ac, secret, &p, end);
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if (ret)
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return ret;
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}
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return 0;
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bad:
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return -EINVAL;
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}
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static int ceph_x_build_authorizer(struct ceph_auth_client *ac,
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struct ceph_x_ticket_handler *th,
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struct ceph_x_authorizer *au)
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@ -583,13 +596,14 @@ static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac,
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struct ceph_x_ticket_handler *th;
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int ret = 0;
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struct ceph_x_authorize_reply reply;
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void *preply = &reply;
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void *p = au->reply_buf;
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void *end = p + sizeof(au->reply_buf);
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th = get_ticket_handler(ac, au->service);
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if (IS_ERR(th))
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return PTR_ERR(th);
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ret = ceph_x_decrypt(&th->session_key, &p, end, &reply, sizeof(reply));
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ret = ceph_x_decrypt(&th->session_key, &p, end, &preply, sizeof(reply));
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if (ret < 0)
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return ret;
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if (ret != sizeof(reply))
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@ -1181,7 +1181,15 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
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if (!m) {
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pr_info("alloc_msg unknown type %d\n", type);
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*skip = 1;
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} else if (front_len > m->front_alloc_len) {
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pr_warning("mon_alloc_msg front %d > prealloc %d (%u#%llu)\n",
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front_len, m->front_alloc_len,
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(unsigned int)con->peer_name.type,
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le64_to_cpu(con->peer_name.num));
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ceph_msg_put(m);
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m = ceph_msg_new(type, front_len, GFP_NOFS, false);
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}
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return m;
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}
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