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Two small fixes, one for crashes using nfs/krb5 with older enctypes, one 

that could prevent clients from reclaiming state after a kernel upgrade.
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Merge tag 'nfsd-5.0-2' of git://linux-nfs.org/~bfields/linux

Pull more nfsd fixes from Bruce Fields:
 "Two small fixes, one for crashes using nfs/krb5 with older enctypes,
  one that could prevent clients from reclaiming state after a kernel
  upgrade"

* tag 'nfsd-5.0-2' of git://linux-nfs.org/~bfields/linux:
  sunrpc: fix 4 more call sites that were using stack memory with a scatterlist
  Revert "nfsd4: return default lease period"
This commit is contained in:
Linus Torvalds 2019-02-16 17:38:01 -08:00
parent 55638c520b e7afe6c1d4
commit 88fe73cb80
2 changed files with 40 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/nfsd/nfsctl.c
View File

@ -1239,8 +1239,8 @@ static __net_init int nfsd_init_net(struct net *net)
retval = nfsd_idmap_init(net);
if (retval)
goto out_idmap_error;
nn->nfsd4_lease = 45; /* default lease time */
nn->nfsd4_grace = 45;
nn->nfsd4_lease = 90; /* default lease time */
nn->nfsd4_grace = 90;
nn->somebody_reclaimed = false;
nn->clverifier_counter = prandom_u32();
nn->clientid_counter = prandom_u32();

49
net/sunrpc/auth_gss/gss_krb5_seqnum.c
View File

@ -44,7 +44,7 @@ krb5_make_rc4_seq_num(struct krb5_ctx *kctx, int direction, s32 seqnum,
unsigned char *cksum, unsigned char *buf)
{
struct crypto_sync_skcipher *cipher;
unsigned char plain[8];
unsigned char *plain;
s32 code;
dprintk("RPC: %s:\n", __func__);
@ -52,6 +52,10 @@ krb5_make_rc4_seq_num(struct krb5_ctx *kctx, int direction, s32 seqnum,
if (IS_ERR(cipher))
return PTR_ERR(cipher);
plain = kmalloc(8, GFP_NOFS);
if (!plain)
return -ENOMEM;
plain[0] = (unsigned char) ((seqnum >> 24) & 0xff);
plain[1] = (unsigned char) ((seqnum >> 16) & 0xff);
plain[2] = (unsigned char) ((seqnum >> 8) & 0xff);
@ -67,6 +71,7 @@ krb5_make_rc4_seq_num(struct krb5_ctx *kctx, int direction, s32 seqnum,
code = krb5_encrypt(cipher, cksum, plain, buf, 8);
out:
kfree(plain);
crypto_free_sync_skcipher(cipher);
return code;
}
@ -77,12 +82,17 @@ krb5_make_seq_num(struct krb5_ctx *kctx,
u32 seqnum,
unsigned char *cksum, unsigned char *buf)
{
unsigned char plain[8];
unsigned char *plain;
s32 code;
if (kctx->enctype == ENCTYPE_ARCFOUR_HMAC)
return krb5_make_rc4_seq_num(kctx, direction, seqnum,
cksum, buf);
plain = kmalloc(8, GFP_NOFS);
if (!plain)
return -ENOMEM;
plain[0] = (unsigned char) (seqnum & 0xff);
plain[1] = (unsigned char) ((seqnum >> 8) & 0xff);
plain[2] = (unsigned char) ((seqnum >> 16) & 0xff);
@ -93,7 +103,9 @@ krb5_make_seq_num(struct krb5_ctx *kctx,
plain[6] = direction;
plain[7] = direction;
return krb5_encrypt(key, cksum, plain, buf, 8);
code = krb5_encrypt(key, cksum, plain, buf, 8);
kfree(plain);
return code;
}
static s32
@ -101,7 +113,7 @@ krb5_get_rc4_seq_num(struct krb5_ctx *kctx, unsigned char *cksum,
unsigned char *buf, int *direction, s32 *seqnum)
{
struct crypto_sync_skcipher *cipher;
unsigned char plain[8];
unsigned char *plain;
s32 code;
dprintk("RPC: %s:\n", __func__);
@ -113,20 +125,28 @@ krb5_get_rc4_seq_num(struct krb5_ctx *kctx, unsigned char *cksum,
if (code)
goto out;
plain = kmalloc(8, GFP_NOFS);
if (!plain) {
code = -ENOMEM;
goto out;
}
code = krb5_decrypt(cipher, cksum, buf, plain, 8);
if (code)
goto out;
goto out_plain;
if ((plain[4] != plain[5]) || (plain[4] != plain[6])
|| (plain[4] != plain[7])) {
code = (s32)KG_BAD_SEQ;
goto out;
goto out_plain;
}
*direction = plain[4];
*seqnum = ((plain[0] << 24) | (plain[1] << 16) |
(plain[2] << 8) | (plain[3]));
out_plain:
kfree(plain);
out:
crypto_free_sync_skcipher(cipher);
return code;
@ -139,7 +159,7 @@ krb5_get_seq_num(struct krb5_ctx *kctx,
int *direction, u32 *seqnum)
{
s32 code;
unsigned char plain[8];
unsigned char *plain;
struct crypto_sync_skcipher *key = kctx->seq;
dprintk("RPC: krb5_get_seq_num:\n");
@ -147,18 +167,25 @@ krb5_get_seq_num(struct krb5_ctx *kctx,
if (kctx->enctype == ENCTYPE_ARCFOUR_HMAC)
return krb5_get_rc4_seq_num(kctx, cksum, buf,
direction, seqnum);
plain = kmalloc(8, GFP_NOFS);
if (!plain)
return -ENOMEM;
if ((code = krb5_decrypt(key, cksum, buf, plain, 8)))
return code;
goto out;
if ((plain[4] != plain[5]) || (plain[4] != plain[6]) ||
(plain[4] != plain[7]))
return (s32)KG_BAD_SEQ;
(plain[4] != plain[7])) {
code = (s32)KG_BAD_SEQ;
goto out;
}
*direction = plain[4];
*seqnum = ((plain[0]) |
(plain[1] << 8) | (plain[2] << 16) | (plain[3] << 24));
return 0;
out:
kfree(plain);
return code;
}