tree 4c50c7acecd3d79c6efb6beee4a359bfdb3322f1
parent 76f4afb40fa076ed23fe0ab42c7a768ddb71123f
author Alberto Garcia <berto@igalia.com> 1433780265 +0200
committer Stefan Hajnoczi <stefanha@redhat.com> 1434114000 +0100

throttle: acquire the ThrottleGroup lock in bdrv_swap()

bdrv_swap() touches the fields of a BlockDriverState that are
protected by the ThrottleGroup lock. Although those fields end up in
their original place, they are temporarily swapped in the process,
so there's a chance that an operation on a member of the same group
happening on a different thread can try to use them.

Signed-off-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: d92dc40d7c4f1fc5cda5cbbf4ffb7a4670b79d17.1433779731.git.berto@igalia.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>