tree 929bde16dc4aa075f378f43a923dfa3dfe6aaefd
parent 53a5d5ddccf849dbc27a8c1bba0b43c3a45fb792
author Herbert Xu <herbert@gondor.apana.org.au> 1473749009 +0800
committer Herbert Xu <herbert@gondor.apana.org.au> 1473763497 +0800

crypto: skcipher - Fix blkcipher walk OOM crash

When we need to allocate a temporary blkcipher_walk_next and it
fails, the code is supposed to take the slow path of processing
the data block by block.  However, due to an unrelated change
we instead end up dereferencing the NULL pointer.

This patch fixes it by moving the unrelated bsize setting out
of the way so that we enter the slow path as inteded.

Fixes: 7607bd8ff03b ("[CRYPTO] blkcipher: Added blkcipher_walk_virt_block")
Cc: stable@vger.kernel.org
Reported-by: xiakaixu <xiakaixu@huawei.com>
Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>