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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2016-11-21 15:34:00 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-11-22 15:02:24 +0800 |
| commit | 8acf7a106326eb94e143552de81f34308149121c (patch) | |
| tree | 4d96cad9eef7f8f4eb502c3766cfa03f813460e3 /crypto | |
| parent | a8348bca2944d397a528772f5c0ccb47a8b58af4 (diff) | |
| download | linux-stable-8acf7a106326eb94e143552de81f34308149121c.tar.gz linux-stable-8acf7a106326eb94e143552de81f34308149121c.tar.bz2 linux-stable-8acf7a106326eb94e143552de81f34308149121c.zip | |
crypto: algif_hash - Fix result clobbering in recvmsg
Recently an init call was added to hash_recvmsg so as to reset
the hash state in case a sendmsg call was never made.
Unfortunately this ended up clobbering the result if the previous
sendmsg was done with a MSG_MORE flag. This patch fixes it by
excluding that case when we make the init call.
Fixes: a8348bca2944 ("algif_hash - Fix NULL hash crash with shash")
Reported-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/algif_hash.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c index 05e21b464433..d19b09cdf284 100644 --- a/crypto/algif_hash.c +++ b/crypto/algif_hash.c @@ -214,7 +214,7 @@ static int hash_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, ahash_request_set_crypt(&ctx->req, NULL, ctx->result, 0); - if (!result) { + if (!result && !ctx->more) { err = af_alg_wait_for_completion( crypto_ahash_init(&ctx->req), &ctx->completion); |