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-posix block driver.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
* Ok, we have to do it the hard way, copy all segments into
* a single aligned buffer.
*/
- buf = qemu_blockalign(aiocb->bs, aiocb->aio_nbytes);
+ buf = qemu_try_blockalign(aiocb->bs, aiocb->aio_nbytes);
+ if (buf == NULL) {
+ return -ENOMEM;
+ }
+
if (aiocb->aio_type & QEMU_AIO_WRITE) {
char *p = buf;
int i;