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authorChuck Lever <chuck.lever@oracle.com>2024-03-21 11:21:47 -0400
committerChuck Lever <chuck.lever@oracle.com>2024-03-22 09:52:00 -0400
commit6978bd6a913825eaf06629a02fc820d240d5fec6 (patch)
tree87b62408b20438b9a78cfa4d497142335e1e5857 /net
parent9fe6e9e7b58944037714442384075c17cfde1c56 (diff)
SUNRPC: Revert 561141dd494382217bace4d1a51d08168420eace
Scott reports an occasional scatterlist BUG that is triggered by the RFC 8009 Kunit test, then says: > Looking through the git history of the auth_gss code, there are various > places where static buffers were replaced by dynamically allocated ones > because they're being used with scatterlists. Reported-by: Scott Mayhew <smayhew@redhat.com> Fixes: 561141dd4943 ("SUNRPC: Use a static buffer for the checksum initialization vector") Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/auth_gss/gss_krb5_crypto.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/net/sunrpc/auth_gss/gss_krb5_crypto.c b/net/sunrpc/auth_gss/gss_krb5_crypto.c
index b2c1b683a88e..d2b02710ab07 100644
--- a/net/sunrpc/auth_gss/gss_krb5_crypto.c
+++ b/net/sunrpc/auth_gss/gss_krb5_crypto.c
@@ -921,8 +921,6 @@ out_err:
* Caller provides the truncation length of the output token (h) in
* cksumout.len.
*
- * Note that for RPCSEC, the "initial cipher state" is always all zeroes.
- *
* Return values:
* %GSS_S_COMPLETE: Digest computed, @cksumout filled in
* %GSS_S_FAILURE: Call failed
@@ -933,19 +931,22 @@ u32 krb5_etm_checksum(struct crypto_sync_skcipher *cipher,
int body_offset, struct xdr_netobj *cksumout)
{
unsigned int ivsize = crypto_sync_skcipher_ivsize(cipher);
- static const u8 iv[GSS_KRB5_MAX_BLOCKSIZE];
struct ahash_request *req;
struct scatterlist sg[1];
+ u8 *iv, *checksumdata;
int err = -ENOMEM;
- u8 *checksumdata;
checksumdata = kmalloc(crypto_ahash_digestsize(tfm), GFP_KERNEL);
if (!checksumdata)
return GSS_S_FAILURE;
+ /* For RPCSEC, the "initial cipher state" is always all zeroes. */
+ iv = kzalloc(ivsize, GFP_KERNEL);
+ if (!iv)
+ goto out_free_mem;
req = ahash_request_alloc(tfm, GFP_KERNEL);
if (!req)
- goto out_free_cksumdata;
+ goto out_free_mem;
ahash_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP, NULL, NULL);
err = crypto_ahash_init(req);
if (err)
@@ -969,7 +970,8 @@ u32 krb5_etm_checksum(struct crypto_sync_skcipher *cipher,
out_free_ahash:
ahash_request_free(req);
-out_free_cksumdata:
+out_free_mem:
+ kfree(iv);
kfree_sensitive(checksumdata);
return err ? GSS_S_FAILURE : GSS_S_COMPLETE;
}