From 4d5a3f888c7dbdd1bf892bab2a3fb5c1455ccc78 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Tue, 20 May 2014 13:30:49 +0200 Subject: [PATCH] iscsi: Handle failure for potentially large allocations 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 Acked-by: Paolo Bonzini Reviewed-by: Benoit Canet Reviewed-by: Eric Blake --- block/iscsi.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/block/iscsi.c b/block/iscsi.c index a7bb697..2c9cfc1 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); -- 2.7.4