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ui/clipboard: fix use-after-free regression 

The same info may be used to update the clipboard, and may be freed
before being ref'ed again.

Fixes: 70a54b0169 ("ui: avoid compiler warnings from unused clipboard info variable")

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220214115917.1679568-1-marcandre.lureau@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Marc-André Lureau 2022-02-14 15:59:17 +04:00 committed by Gerd Hoffmann
parent cb8962c146
commit 02a8ee2e18
1 changed files with 4 additions and 2 deletions
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6
ui/clipboard.c
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@ -66,8 +66,10 @@ void qemu_clipboard_update(QemuClipboardInfo *info)
notifier_list_notify(&clipboard_notifiers, &notify);
qemu_clipboard_info_unref(cbinfo[info->selection]);
cbinfo[info->selection] = qemu_clipboard_info_ref(info);
if (cbinfo[info->selection] != info) {
qemu_clipboard_info_unref(cbinfo[info->selection]);
cbinfo[info->selection] = qemu_clipboard_info_ref(info);
}
}
QemuClipboardInfo *qemu_clipboard_info(QemuClipboardSelection selection)