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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-03-12 18:29:05 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-03-12 18:37:16 +0100 |
| commit | 0097143c12e279f5d454e0f636a02afff102cc6a (patch) | |
| tree | 4c8c6bc4d3901f1d210d5d3d900368be1705f217 /net/sunrpc/auth_gss | |
| parent | NFS: Check return value from rpc_queue_upcall() (diff) | |
| download | linux-0097143c12e279f5d454e0f636a02afff102cc6a.tar.xz linux-0097143c12e279f5d454e0f636a02afff102cc6a.zip | |
SUNRPC: Don't use variable length automatic arrays in kernel code
Replace the variable length array in the RPCSEC_GSS crypto code with
a fixed length one. The size should be bounded by the variable
GSS_KRB5_MAX_BLOCKSIZE, so use that.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/auth_gss')
| -rw-r--r-- | net/sunrpc/auth_gss/gss_krb5_crypto.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/sunrpc/auth_gss/gss_krb5_crypto.c b/net/sunrpc/auth_gss/gss_krb5_crypto.c index 9576f35ab701..0f43e894bc0a 100644 --- a/net/sunrpc/auth_gss/gss_krb5_crypto.c +++ b/net/sunrpc/auth_gss/gss_krb5_crypto.c @@ -600,11 +600,14 @@ gss_krb5_cts_crypt(struct crypto_blkcipher *cipher, struct xdr_buf *buf, u32 ret; struct scatterlist sg[1]; struct blkcipher_desc desc = { .tfm = cipher, .info = iv }; - u8 data[crypto_blkcipher_blocksize(cipher) * 2]; + u8 data[GSS_KRB5_MAX_BLOCKSIZE * 2]; struct page **save_pages; u32 len = buf->len - offset; - BUG_ON(len > crypto_blkcipher_blocksize(cipher) * 2); + if (len > ARRAY_SIZE(data)) { + WARN_ON(0); + return -ENOMEM; + } /* * For encryption, we want to read from the cleartext |