From 6065d5484a092d55b274876d1fafb8223041842a Mon Sep 17 00:00:00 2001 From: Max Reitz Date: Tue, 2 Dec 2014 18:32:45 +0100 Subject: [PATCH] block: Check create_opts before image creation If a driver supports image creation, it needs to set the .create_opts field. We can use that to make sure .create_opts for both drivers involved is not NULL in bdrv_img_create(), which is important so that the create_opts pointer in that function is not NULL after the qemu_opts_append() calls and when going into qemu_opts_create(). Cc: qemu-stable@nongnu.org Signed-off-by: Max Reitz Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf (cherry picked from commit c6149724080af7b3d5d61eac8942655e6d212783) Signed-off-by: Michael Roth --- block.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/block.c b/block.c index a6197da71f..07f58fcf1b 100644 --- a/block.c +++ b/block.c @@ -5534,6 +5534,18 @@ void bdrv_img_create(const char *filename, const char *fmt, return; } + if (!drv->create_opts) { + error_setg(errp, "Format driver '%s' does not support image creation", + drv->format_name); + return; + } + + if (!proto_drv->create_opts) { + error_setg(errp, "Protocol driver '%s' does not support image creation", + proto_drv->format_name); + return; + } + create_opts = qemu_opts_append(create_opts, drv->create_opts); create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); -- 2.11.4.GIT