From 4b6af3d58a73193017926dd59de3b3e7b4890323 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Wed, 21 May 2014 18:05:47 +0200 Subject: raw-win32: 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 raw-win32 block driver. Signed-off-by: Kevin Wolf Reviewed-by: Stefan Hajnoczi --- block/win32-aio.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'block/win32-aio.c') diff --git a/block/win32-aio.c b/block/win32-aio.c index 8e417f70ae..5030e3274d 100644 --- a/block/win32-aio.c +++ b/block/win32-aio.c @@ -139,7 +139,10 @@ BlockDriverAIOCB *win32_aio_submit(BlockDriverState *bs, 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); } @@ -168,6 +171,7 @@ BlockDriverAIOCB *win32_aio_submit(BlockDriverState *bs, out_dec_count: aio->count--; +out: qemu_aio_release(waiocb); return NULL; } -- cgit v1.2.3