File 0072-usb-ehci-fix-memory-leak-in-ehci_pr.patch of Package qemu.20756

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File 0072-usb-ehci-fix-memory-leak-in-ehci_pr.patch of Package qemu.20756

From: Li Qiang <liqiang6-s@360.cn>
Date: Sun, 18 Sep 2016 19:48:35 -0700
Subject: usb: ehci: fix memory leak in ehci_process_itd

While processing isochronous transfer descriptors(iTD), if the page
select(PG) field value is out of bands it will return. In this
situation the ehci's sg list is not freed thus leading to a memory
leak issue. This patch avoid this.

Signed-off-by: Li Qiang <liqiang6-s@360.cn>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(cherry picked from commit b16c129daf0fed91febbb88de23dae8271c8898a)
[BR: CVE-2016-7995 BSC#1003612]
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/usb/hcd-ehci.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c
index 43a8f7abcc592262c713d3887c7a..92241bbad79b1ddb3dcddbbea848 100644
--- a/hw/usb/hcd-ehci.c
+++ b/hw/usb/hcd-ehci.c
@@ -1426,6 +1426,7 @@ static int ehci_process_itd(EHCIState *ehci,
             if (off + len > 4096) {
                 /* transfer crosses page border */
                 if (pg == 6) {
+                    qemu_sglist_destroy(&ehci->isgl);
                     return -1;  /* avoid page pg + 1 */
                 }
                 ptr2 = (itd->bufptr[pg + 1] & ITD_BUFPTR_MASK);

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File 0072-usb-ehci-fix-memory-leak-in-ehci_pr.patch of Package qemu.20756

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