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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2011-06-27 15:45:19 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2011-06-30 07:44:06 +0800 |
| commit | 269230e7c52623cda279010c8032a6f5b59caaaf (patch) | |
| tree | 4acb3b9d9e4b1f7b3151d8e91e3201524140893a | |
| parent | 36ca239b245dbdec3b0c94976e956226bdd4108c (diff) | |
| download | linux-269230e7c52623cda279010c8032a6f5b59caaaf.tar.bz2 | |
crypto: algif_hash - Handle initial af_alg_make_sg error correctly
When the first call to af_alg_make_sg fails, we may return garbage
instead of the real error. This patch fixes it by setting the error
if "copied" is zero.
Based on a patch by Jesper Juhl.
Reported-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/algif_hash.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c index 62122a1a2f7a..ef5356cd280a 100644 --- a/crypto/algif_hash.c +++ b/crypto/algif_hash.c @@ -68,8 +68,10 @@ static int hash_sendmsg(struct kiocb *unused, struct socket *sock, int newlen; newlen = af_alg_make_sg(&ctx->sgl, from, len, 0); - if (newlen < 0) + if (newlen < 0) { + err = copied ? 0 : newlen; goto unlock; + } ahash_request_set_crypt(&ctx->req, ctx->sgl.sg, NULL, newlen); |