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Commit c73f6fdf authored by Linus Torvalds's avatar Linus Torvalds
Browse files

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()
parents 7ee2d2d6 c27a3e4d

drivers/block/rbd.c

+4 −2
Original line number Diff line number Diff line
@@ -5087,9 +5087,11 @@ static int rbd_dev_device_setup(struct rbd_device *rbd_dev) 
	set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);

	set_disk_ro(rbd_dev->disk, rbd_dev->mapping.read_only);



	rbd_dev->rq_wq = alloc_workqueue(rbd_dev->disk->disk_name, 0, 0);

	if (!rbd_dev->rq_wq)

	rbd_dev->rq_wq = alloc_workqueue("%s", 0, 0, rbd_dev->disk->disk_name);

	if (!rbd_dev->rq_wq) {

		ret = -ENOMEM;

		goto err_out_mapping;

	}



	ret = rbd_bus_add_dev(rbd_dev);

	if (ret)

net/ceph/auth_x.c

+135 −121
Original line number Diff line number Diff line
@@ -13,8 +13,6 @@ 
#include "auth_x.h"

#include "auth_x_protocol.h"



#define TEMP_TICKET_BUF_LEN	256



static void ceph_x_validate_tickets(struct ceph_auth_client *ac, int *pneed);



static int ceph_x_is_authenticated(struct ceph_auth_client *ac)
@@ -64,7 +62,7 @@ static int ceph_x_encrypt(struct ceph_crypto_key *secret, 
}



static int ceph_x_decrypt(struct ceph_crypto_key *secret,

			  void **p, void *end, void *obuf, size_t olen)

			  void **p, void *end, void **obuf, size_t olen)

{

	struct ceph_x_encrypt_header head;

	size_t head_len = sizeof(head);
@@ -75,8 +73,14 @@ static int ceph_x_decrypt(struct ceph_crypto_key *secret, 
		return -EINVAL;



	dout("ceph_x_decrypt len %d\n", len);

	ret = ceph_decrypt2(secret, &head, &head_len, obuf, &olen,

			    *p, len);

	if (*obuf == NULL) {

		*obuf = kmalloc(len, GFP_NOFS);

		if (!*obuf)

			return -ENOMEM;

		olen = len;

	}



	ret = ceph_decrypt2(secret, &head, &head_len, *obuf, &olen, *p, len);

	if (ret)

		return ret;

	if (head.struct_v != 1 || le64_to_cpu(head.magic) != CEPHX_ENC_MAGIC)
@@ -129,55 +133,35 @@ static void remove_ticket_handler(struct ceph_auth_client *ac, 
	kfree(th);

}



static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,

static int process_one_ticket(struct ceph_auth_client *ac,

			      struct ceph_crypto_key *secret,

				    void *buf, void *end)

			      void **p, void *end)

{

	struct ceph_x_info *xi = ac->private;

	int num;

	void *p = buf;

	int ret;

	char *dbuf;

	char *ticket_buf;

	u8 reply_struct_v;



	dbuf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);

	if (!dbuf)

		return -ENOMEM;



	ret = -ENOMEM;

	ticket_buf = kmalloc(TEMP_TICKET_BUF_LEN, GFP_NOFS);

	if (!ticket_buf)

		goto out_dbuf;



	ceph_decode_need(&p, end, 1 + sizeof(u32), bad);

	reply_struct_v = ceph_decode_8(&p);

	if (reply_struct_v != 1)

		goto bad;

	num = ceph_decode_32(&p);

	dout("%d tickets\n", num);

	while (num--) {

	int type;

	u8 tkt_struct_v, blob_struct_v;

	struct ceph_x_ticket_handler *th;

	void *dbuf = NULL;

	void *dp, *dend;

	int dlen;

	char is_enc;

	struct timespec validity;

	struct ceph_crypto_key old_key;

	void *ticket_buf = NULL;

	void *tp, *tpend;

	struct ceph_timespec new_validity;

	struct ceph_crypto_key new_session_key;

	struct ceph_buffer *new_ticket_blob;

	unsigned long new_expires, new_renew_after;

	u64 new_secret_id;

	int ret;



		ceph_decode_need(&p, end, sizeof(u32) + 1, bad);

	ceph_decode_need(p, end, sizeof(u32) + 1, bad);



		type = ceph_decode_32(&p);

	type = ceph_decode_32(p);

	dout(" ticket type %d %s\n", type, ceph_entity_type_name(type));



		tkt_struct_v = ceph_decode_8(&p);

	tkt_struct_v = ceph_decode_8(p);

	if (tkt_struct_v != 1)

		goto bad;
@@ -188,15 +172,14 @@ static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, 
	}



	/* blob for me */

		dlen = ceph_x_decrypt(secret, &p, end, dbuf,

				      TEMP_TICKET_BUF_LEN);

	dlen = ceph_x_decrypt(secret, p, end, &dbuf, 0);

	if (dlen <= 0) {

		ret = dlen;

		goto out;

	}

	dout(" decrypted %d bytes\n", dlen);

		dend = dbuf + dlen;

	dp = dbuf;

	dend = dp + dlen;



	tkt_struct_v = ceph_decode_8(&dp);

	if (tkt_struct_v != 1)
@@ -215,23 +198,28 @@ static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, 
	     new_renew_after);



	/* ticket blob for service */

		ceph_decode_8_safe(&p, end, is_enc, bad);

		tp = ticket_buf;

	ceph_decode_8_safe(p, end, is_enc, bad);

	if (is_enc) {

		/* encrypted */

		dout(" encrypted ticket\n");

			dlen = ceph_x_decrypt(&old_key, &p, end, ticket_buf,

					      TEMP_TICKET_BUF_LEN);

		dlen = ceph_x_decrypt(&old_key, p, end, &ticket_buf, 0);

		if (dlen < 0) {

			ret = dlen;

			goto out;

		}

		tp = ticket_buf;

		dlen = ceph_decode_32(&tp);

	} else {

		/* unencrypted */

			ceph_decode_32_safe(&p, end, dlen, bad);

			ceph_decode_need(&p, end, dlen, bad);

			ceph_decode_copy(&p, ticket_buf, dlen);

		ceph_decode_32_safe(p, end, dlen, bad);

		ticket_buf = kmalloc(dlen, GFP_NOFS);

		if (!ticket_buf) {

			ret = -ENOMEM;

			goto out;

		}

		tp = ticket_buf;

		ceph_decode_need(p, end, dlen, bad);

		ceph_decode_copy(p, ticket_buf, dlen);

	}

	tpend = tp + dlen;

	dout(" ticket blob is %d bytes\n", dlen);
@@ -256,12 +244,9 @@ static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, 
	     type, ceph_entity_type_name(type), th->secret_id,

	     (int)th->ticket_blob->vec.iov_len);

	xi->have_keys |= th->service;

	}



	ret = 0;

out:

	kfree(ticket_buf);

out_dbuf:

	kfree(dbuf);

	return ret;
@@ -270,6 +255,34 @@ static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac, 
	goto out;

}



static int ceph_x_proc_ticket_reply(struct ceph_auth_client *ac,

				    struct ceph_crypto_key *secret,

				    void *buf, void *end)

{

	void *p = buf;

	u8 reply_struct_v;

	u32 num;

	int ret;



	ceph_decode_8_safe(&p, end, reply_struct_v, bad);

	if (reply_struct_v != 1)

		return -EINVAL;



	ceph_decode_32_safe(&p, end, num, bad);

	dout("%d tickets\n", num);



	while (num--) {

		ret = process_one_ticket(ac, secret, &p, end);

		if (ret)

			return ret;

	}



	return 0;



bad:

	return -EINVAL;

}



static int ceph_x_build_authorizer(struct ceph_auth_client *ac,

				   struct ceph_x_ticket_handler *th,

				   struct ceph_x_authorizer *au)
@@ -583,13 +596,14 @@ static int ceph_x_verify_authorizer_reply(struct ceph_auth_client *ac, 
	struct ceph_x_ticket_handler *th;

	int ret = 0;

	struct ceph_x_authorize_reply reply;

	void *preply = &reply;

	void *p = au->reply_buf;

	void *end = p + sizeof(au->reply_buf);



	th = get_ticket_handler(ac, au->service);

	if (IS_ERR(th))

		return PTR_ERR(th);

	ret = ceph_x_decrypt(&th->session_key, &p, end, &reply, sizeof(reply));

	ret = ceph_x_decrypt(&th->session_key, &p, end, &preply, sizeof(reply));

	if (ret < 0)

		return ret;

	if (ret != sizeof(reply))

net/ceph/mon_client.c

+8 −0
Original line number Diff line number Diff line
@@ -1181,7 +1181,15 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, 
	if (!m) {

		pr_info("alloc_msg unknown type %d\n", type);

		*skip = 1;

	} else if (front_len > m->front_alloc_len) {

		pr_warning("mon_alloc_msg front %d > prealloc %d (%u#%llu)\n",

			   front_len, m->front_alloc_len,

			   (unsigned int)con->peer_name.type,

			   le64_to_cpu(con->peer_name.num));

		ceph_msg_put(m);

		m = ceph_msg_new(type, front_len, GFP_NOFS, false);

	}



	return m;

}