tree 3099defaf443113295568a51fe6bbab72b34542c
parent 13fd8a5dc3cfaf0699262a3b5ad4898752fe64da
author Sasha Levin <sasha.levin@oracle.com> 1384900382 -0500
committer Benjamin LaHaise <bcrl@kvack.org> 1384900848 -0500

aio: prevent double free in ioctx_alloc

ioctx_alloc() calls aio_setup_ring() to allocate a ring. If aio_setup_ring()
fails to do so it would call aio_free_ring() before returning, but
ioctx_alloc() would call aio_free_ring() again causing a double free of
the ring.

This is easily reproducible from userspace.

Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>