From 0ea5f594feca3a4240697685d25d6cb0d1e6fea0 Mon Sep 17 00:00:00 2001 From: Zhao Liu Date: Mon, 11 Mar 2024 11:38:06 +0800 Subject: block/virtio-blk: Fix missing ERRP_GUARD() for error_prepend() As the comment in qapi/error, passing @errp to error_prepend() requires ERRP_GUARD(): * = Why, when and how to use ERRP_GUARD() = * * Without ERRP_GUARD(), use of the @errp parameter is restricted: ... * - It should not be passed to error_prepend(), error_vprepend() or * error_append_hint(), because that doesn't work with &error_fatal. * ERRP_GUARD() lifts these restrictions. * * To use ERRP_GUARD(), add it right at the beginning of the function. * @errp can then be used without worrying about the argument being * NULL or &error_fatal. ERRP_GUARD() could avoid the case when @errp is &error_fatal, the user can't see this additional information, because exit() happens in error_setg earlier than information is added [1]. The virtio_blk_vq_aio_context_init() passes @errp to error_prepend(). Though its @errp points its caller's local @err variable, to follow the requirement of @errp, add missing ERRP_GUARD() at the beginning of virtio_blk_vq_aio_context_init(). [1]: Issue description in the commit message of commit ae7c80a7bd73 ("error: New macro ERRP_GUARD()"). Cc: Stefan Hajnoczi Cc: "Michael S. Tsirkin" Cc: Kevin Wolf Cc: Hanna Reitz Cc: qemu-block@nongnu.org Signed-off-by: Zhao Liu Reviewed-by: Stefan Hajnoczi Acked-by: "Michael S. Tsirkin" Message-ID: <20240311033822.3142585-14-zhao1.liu@linux.intel.com> Signed-off-by: Thomas Huth --- hw/block/virtio-blk.c | 1 + 1 file changed, 1 insertion(+) (limited to 'hw/block') diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c index 738cb2ac36..92de315f17 100644 --- a/hw/block/virtio-blk.c +++ b/hw/block/virtio-blk.c @@ -1682,6 +1682,7 @@ static bool apply_iothread_vq_mapping( /* Context: BQL held */ static bool virtio_blk_vq_aio_context_init(VirtIOBlock *s, Error **errp) { + ERRP_GUARD(); VirtIODevice *vdev = VIRTIO_DEVICE(s); VirtIOBlkConf *conf = &s->conf; BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev))); -- cgit v1.2.3