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 iscsi block driver.
Signed-off-by: Kevin Wolf <kw...@redhat.com>
Acked-by: Paolo Bonzini <pbonz...@redhat.com>
Reviewed-by: Benoit Canet <ben...@irqsave.net>
Reviewed-by: Eric Blake <ebl...@redhat.com>
---
block/iscsi.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/block/iscsi.c b/block/iscsi.c
index 84aa22a..06afa78 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -893,7 +893,10 @@ coroutine_fn iscsi_co_write_zeroes(BlockDriverState *bs,
int64_t sector_num,
nb_blocks = sector_qemu2lun(nb_sectors, iscsilun);
if (iscsilun->zeroblock == NULL) {
- iscsilun->zeroblock = g_malloc0(iscsilun->block_size);
+ iscsilun->zeroblock = g_try_malloc0(iscsilun->block_size);
+ if (iscsilun->zeroblock == NULL) {
+ return -ENOMEM;
+ }
}
iscsi_co_init_iscsitask(iscsilun, &iTask);
--
1.8.3.1
