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authortim <tim.c.chen@linux.intel.com>2016-12-05 11:46:31 -0800
committerHerbert Xu <herbert@gondor.apana.org.au>2016-12-07 19:55:37 +0800
commit48a992727d82cb7db076fa15d372178743b1f4cd (patch)
tree2cc24a02c43a2d4d6382916f4614b118b82d27b4 /net/irda
parent0c1e16cd1ec41987cc6671a2bff46ac958c41eb5 (diff)
crypto: mcryptd - Check mcryptd algorithm compatibility
Algorithms not compatible with mcryptd could be spawned by mcryptd with a direct crypto_alloc_tfm invocation using a "mcryptd(alg)" name construct. This causes mcryptd to crash the kernel if an arbitrary "alg" is incompatible and not intended to be used with mcryptd. It is an issue if AF_ALG tries to spawn mcryptd(alg) to expose it externally. But such algorithms must be used internally and not be exposed. We added a check to enforce that only internal algorithms are allowed with mcryptd at the time mcryptd is spawning an algorithm. Link: http://marc.info/?l=linux-crypto-vger&m=148063683310477&w=2 Cc: stable@vger.kernel.org Reported-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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