From 0097143c12e279f5d454e0f636a02afff102cc6a Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Mon, 12 Mar 2012 13:29:05 -0400 Subject: [PATCH] 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 --- net/sunrpc/auth_gss/gss_krb5_crypto.c | 7 +++++-- 1 file 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 -- 2.20.1