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82 lines
2.7 KiB
82 lines
2.7 KiB
From 6e4f68e9ba3fe75ca6f200f189f96bb402f0ee8e Mon Sep 17 00:00:00 2001
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From: Fiona Ebner <f.ebner@proxmox.com>
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Date: Wed, 24 Jan 2024 11:57:49 +0100
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Subject: [PATCH 02/20] ui/clipboard: add asserts for update and request
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Jon Maloy <jmaloy@redhat.com>
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RH-MergeRequest: 228: ui/clipboard: mark type as not available when there is no data
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RH-Jira: RHEL-19629
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RH-Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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RH-Acked-by: Gerd Hoffmann <None>
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RH-Commit: [2/2] 176b4b835fd8aa226f2fa93fd334b9384080cf21 (jmaloy/jmaloy-qemu-kvm-2)
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JIRA: https://issues.redhat.com/browse/RHEL-19629
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CVE: CVE-2023-6683
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Upstream: Merged
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ui/clipboard: add asserts for update and request
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commit 9c416582611b7495bdddb4c5456c7acb64b78938
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Author: Fiona Ebner <f.ebner@proxmox.com>
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Date: Wed Jan 24 11:57:49 2024 +0100
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ui/clipboard: add asserts for update and request
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Should an issue like CVE-2023-6683 ever appear again in the future,
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it will be more obvious which assumption was violated.
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Suggested-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
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Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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Message-ID: <20240124105749.204610-2-f.ebner@proxmox.com>
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Signed-off-by: Jon Maloy <jmaloy@redhat.com>
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---
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ui/clipboard.c | 14 ++++++++++++++
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1 file changed, 14 insertions(+)
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diff --git a/ui/clipboard.c b/ui/clipboard.c
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index b3f6fa3c9e..4264884a6c 100644
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--- a/ui/clipboard.c
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+++ b/ui/clipboard.c
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@@ -65,12 +65,24 @@ bool qemu_clipboard_check_serial(QemuClipboardInfo *info, bool client)
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void qemu_clipboard_update(QemuClipboardInfo *info)
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{
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+ uint32_t type;
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QemuClipboardNotify notify = {
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.type = QEMU_CLIPBOARD_UPDATE_INFO,
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.info = info,
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};
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assert(info->selection < QEMU_CLIPBOARD_SELECTION__COUNT);
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+ for (type = 0; type < QEMU_CLIPBOARD_TYPE__COUNT; type++) {
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+ /*
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+ * If data is missing, the clipboard owner's 'request' callback needs to
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+ * be set. Otherwise, there is no way to get the clipboard data and
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+ * qemu_clipboard_request() cannot be called.
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+ */
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+ if (info->types[type].available && !info->types[type].data) {
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+ assert(info->owner && info->owner->request);
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+ }
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+ }
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+
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notifier_list_notify(&clipboard_notifiers, ¬ify);
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if (cbinfo[info->selection] != info) {
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@@ -132,6 +144,8 @@ void qemu_clipboard_request(QemuClipboardInfo *info,
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!info->owner)
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return;
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+ assert(info->owner->request);
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+
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info->types[type].requested = true;
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info->owner->request(info, type);
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}
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--
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2.39.3
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