From: Gerd Hoffmann <kraxel@redhat.com>
To: qemu-devel@nongnu.org
Cc: Gerd Hoffmann <kraxel@redhat.com>
Subject: [Qemu-devel] [PATCH] usb-redir: fix use-after-free
Date: Wed, 31 Jul 2013 11:21:51 +0200 [thread overview]
Message-ID: <1375262511-28604-1-git-send-email-kraxel@redhat.com> (raw)
Reinitialize dev->cs to NULL after deleting it, to make sure it isn't
used afterwards.
Reported-by: Martin Cerveny <M.Cerveny@computer.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
hw/usb/redirect.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
index 8b8c010..e3b9f32 100644
--- a/hw/usb/redirect.c
+++ b/hw/usb/redirect.c
@@ -1334,6 +1334,7 @@ static void usbredir_handle_destroy(USBDevice *udev)
USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
qemu_chr_delete(dev->cs);
+ dev->cs = NULL;
/* Note must be done after qemu_chr_close, as that causes a close event */
qemu_bh_delete(dev->chardev_close_bh);
--
1.7.9.7
next reply other threads:[~2013-07-31 9:22 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-31 9:21 Gerd Hoffmann [this message]
2013-07-31 12:25 ` [Qemu-devel] [PATCH] usb-redir: fix use-after-free Laszlo Ersek
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