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From bba21b64c47889ee3a11b3f011fab73b84697e16 Mon Sep 17 00:00:00 2001
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From: Gerd Hoffmann <kraxel@redhat.com>
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Date: Fri, 11 Jul 2014 14:20:37 +0200
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Subject: [PATCH 04/43] usb-redir: fix use-after-free
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Message-id: <1405088470-24115-5-git-send-email-kraxel@redhat.com>
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Patchwork-id: 59819
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O-Subject: [RHEL-7.1 qemu-kvm PATCH 04/37] usb-redir: fix use-after-free
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Bugzilla: 1046574 1088116
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: Hans de Goede <hdegoede@redhat.com>
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Markus Armbruster <armbru@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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Reinitialize dev->cs to NULL after deleting it, to make sure it isn't
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used afterwards.
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Reported-by: Martin Cerveny <M.Cerveny@computer.org>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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(cherry picked from commit a14ff8a650b5943ee6221b952494661f7cb3b5e2)
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---
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hw/usb/redirect.c | 1 +
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1 file changed, 1 insertion(+)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/usb/redirect.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
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index 8b8c010..e3b9f32 100644
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--- a/hw/usb/redirect.c
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+++ b/hw/usb/redirect.c
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@@ -1334,6 +1334,7 @@ static void usbredir_handle_destroy(USBDevice *udev)
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USBRedirDevice *dev = DO_UPCAST(USBRedirDevice, dev, udev);
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qemu_chr_delete(dev->cs);
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+ dev->cs = NULL;
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/* Note must be done after qemu_chr_close, as that causes a close event */
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qemu_bh_delete(dev->chardev_close_bh);
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--
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1.8.3.1
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