commit 96ad8d508fcbe54ed2d559f03d1adaddf19b96e7
author Herbert Xu <herbert@gondor.apana.org.au> Sat Dec 07 22:15:15 2019 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Fri Feb 14 16:31:02 2020 -0500
tree 7192c4d9a8ef4f13e8963755d325bc6bc2611f77
parent df3168ec1350038c8aebb547fe8f62a7da47a683

crypto: api - Fix race condition in crypto_spawn_alg

commit 73669cc556462f4e50376538d77ee312142e8a8a upstream.

The function crypto_spawn_alg is racy because it drops the lock
before shooting the dying algorithm.  The algorithm could disappear
altogether before we shoot it.

This patch fixes it by moving the shooting into the locked section.

Fixes: 6bfd48096ff8 ("[CRYPTO] api: Added spawns")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>