51 lines
1.8 KiB
Diff
51 lines
1.8 KiB
Diff
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From 0b38614471dbc44b87a1d2449e602df50c3ff535 Mon Sep 17 00:00:00 2001
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From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
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Date: Thu, 5 Sep 2019 08:50:37 +0100
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Subject: [PATCH 2/6] ehci: fix queue->dev null ptr dereference
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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: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Message-id: <20190905085037.5648-2-dgilbert@redhat.com>
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Patchwork-id: 90288
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O-Subject: [RHEL-AV-8.1 qemu-kvm PATCH 1/1] ehci: fix queue->dev null ptr dereference
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Bugzilla: 1746790
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RH-Acked-by: Peter Xu <peterx@redhat.com>
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RH-Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com>
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RH-Acked-by: Juan Quintela <quintela@redhat.com>
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From: Gerd Hoffmann <kraxel@redhat.com>
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In case we don't have a device for an active queue, just skip
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processing the queue (same we do for inactive queues) and log
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a guest bug.
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Reported-by: Guenter Roeck <linux@roeck-us.net>
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Tested-by: Guenter Roeck <linux@roeck-us.net>
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Message-id: 20190821085319.13711-1-kraxel@redhat.com
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(cherry picked from commit 1be344b7ad25d572dadeee46d80f0103354352b2)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/usb/hcd-ehci.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
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index 62dab05..5f089f3 100644
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--- a/hw/usb/hcd-ehci.c
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+++ b/hw/usb/hcd-ehci.c
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@@ -1834,6 +1834,9 @@ static int ehci_state_fetchqtd(EHCIQueue *q)
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ehci_set_state(q->ehci, q->async, EST_EXECUTING);
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break;
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}
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+ } else if (q->dev == NULL) {
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+ ehci_trace_guest_bug(q->ehci, "no device attached to queue");
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+ ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
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} else {
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p = ehci_alloc_packet(q);
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p->qtdaddr = q->qtdaddr;
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--
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1.8.3.1
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