diff options
Diffstat (limited to 'meta/recipes-devtools/qemu/qemu/CVE-2020-25625.patch')
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu/CVE-2020-25625.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2020-25625.patch b/meta/recipes-devtools/qemu/qemu/CVE-2020-25625.patch new file mode 100644 index 0000000000..374d7c4562 --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/CVE-2020-25625.patch @@ -0,0 +1,42 @@ +From 1be90ebecc95b09a2ee5af3f60c412b45a766c4f Mon Sep 17 00:00:00 2001 +From: Prasad J Pandit <pjp@fedoraproject.org> +Date: Tue, 15 Sep 2020 23:52:59 +0530 +Subject: [PATCH] hw: usb: hcd-ohci: check for processed TD before retire + +While servicing OHCI transfer descriptors(TD), ohci_service_iso_td +retires a TD if it has passed its time frame. It does not check if +the TD was already processed once and holds an error code in TD_CC. +It may happen if the TD list has a loop. Add check to avoid an +infinite loop condition. + +Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org> +Reviewed-by: Li Qiang <liq3ea@gmail.com> +Message-id: 20200915182259.68522-3-ppandit@redhat.com +Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> + +Upstream-Status: Backport +CVE: CVE-2020-25625 +Signed-off-by: Armin Kuster <akuster@mvista.com> + +--- + hw/usb/hcd-ohci.c | 4 ++++ + 1 file changed, 4 insertions(+) + +diff --git a/hw/usb/hcd-ohci.c b/hw/usb/hcd-ohci.c +index 9dc59101f9..8b912e95d3 100644 +--- a/hw/usb/hcd-ohci.c ++++ b/hw/usb/hcd-ohci.c +@@ -691,6 +691,10 @@ static int ohci_service_iso_td(OHCIState *ohci, struct ohci_ed *ed, + the next ISO TD of the same ED */ + trace_usb_ohci_iso_td_relative_frame_number_big(relative_frame_number, + frame_count); ++ if (OHCI_CC_DATAOVERRUN == OHCI_BM(iso_td.flags, TD_CC)) { ++ /* avoid infinite loop */ ++ return 1; ++ } + OHCI_SET_BM(iso_td.flags, TD_CC, OHCI_CC_DATAOVERRUN); + ed->head &= ~OHCI_DPTR_MASK; + ed->head |= (iso_td.next & OHCI_DPTR_MASK); +-- +2.25.1 + |