Eric Biggers
3ad85176e7
crypto: pcrypt - fix freeing pcrypt instances
...
commit d76c68109f37cb85b243a1cf0f40313afd2bae68 upstream.
pcrypt is using the old way of freeing instances, where the ->free()
method specified in the 'struct crypto_template' is passed a pointer to
the 'struct crypto_instance'. But the crypto_instance is being
kfree()'d directly, which is incorrect because the memory was actually
allocated as an aead_instance, which contains the crypto_instance at a
nonzero offset. Thus, the wrong pointer was being kfree()'d.
Fix it by switching to the new way to free aead_instance's where the
->free() method is specified in the aead_instance itself.
Reported-by: syzbot <syzkaller@googlegroups.com >
Fixes: 0496f56065 ("crypto: pcrypt - Add support for new AEAD interface")
Signed-off-by: Eric Biggers <ebiggers@google.com >
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au >
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org >
2018-01-10 09:27:09 +01:00
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