Some code in the block layer makes potentially huge allocations. Failure
is not completely unexpected there, so avoid aborting qemu and handle
out-of-memory situations gracefully.
This patch addresses the allocations in the raw-win32 block driver.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
waiocb->is_read = (type == QEMU_AIO_READ);
if (qiov->niov > 1) {
- waiocb->buf = qemu_blockalign(bs, qiov->size);
+ waiocb->buf = qemu_try_blockalign(bs, qiov->size);
+ if (waiocb->buf == NULL) {
+ goto out;
+ }
if (type & QEMU_AIO_WRITE) {
iov_to_buf(qiov->iov, qiov->niov, 0, waiocb->buf, qiov->size);
}
out_dec_count:
aio->count--;
+out:
qemu_aio_release(waiocb);
return NULL;
}