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 curl block driver.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
state->buf_start = start;
state->buf_len = acb->end + s->readahead_size;
end = MIN(start + state->buf_len, s->len) - 1;
- state->orig_buf = g_malloc(state->buf_len);
+ state->orig_buf = g_try_malloc(state->buf_len);
+ if (state->buf_len && state->orig_buf == NULL) {
+ curl_clean_state(state);
+ acb->common.cb(acb->common.opaque, -ENOMEM);
+ qemu_aio_release(acb);
+ return;
+ }
state->acb[0] = acb;
snprintf(state->range, 127, "%zd-%zd", start, end);