Date: Wed, 24 Jul 2019 12:56:07 +0000 (UTC) From: Gordon Tetlow <gordon@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r350285 - in releng: 11.2/usr.sbin/bhyve 11.3/usr.sbin/bhyve 12.0/usr.sbin/bhyve Message-ID: <201907241256.x6OCu7xM076540@repo.freebsd.org>
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Author: gordon Date: Wed Jul 24 12:56:06 2019 New Revision: 350285 URL: https://svnweb.freebsd.org/changeset/base/350285 Log: Fix byhve out-of-bounds read in XHCI device. Approved by: so Security: FreeBSD-SA-19:16.bhyve Security: CVE-2019-5604 Modified: releng/11.2/usr.sbin/bhyve/pci_xhci.c releng/11.3/usr.sbin/bhyve/pci_xhci.c releng/12.0/usr.sbin/bhyve/pci_xhci.c Modified: releng/11.2/usr.sbin/bhyve/pci_xhci.c ============================================================================== --- releng/11.2/usr.sbin/bhyve/pci_xhci.c Wed Jul 24 12:55:16 2019 (r350284) +++ releng/11.2/usr.sbin/bhyve/pci_xhci.c Wed Jul 24 12:56:06 2019 (r350285) @@ -1898,6 +1898,11 @@ pci_xhci_device_doorbell(struct pci_xhci_softc *sc, ui return; } + if (epid == 0 || epid >= XHCI_MAX_ENDPOINTS) { + DPRINTF(("pci_xhci: invalid endpoint %u\r\n", epid)); + return; + } + dev = XHCI_SLOTDEV_PTR(sc, slot); devep = &dev->eps[epid]; dev_ctx = pci_xhci_get_dev_ctx(sc, slot); @@ -1923,6 +1928,23 @@ pci_xhci_device_doorbell(struct pci_xhci_softc *sc, ui /* get next trb work item */ if (XHCI_EPCTX_0_MAXP_STREAMS_GET(ep_ctx->dwEpCtx0) != 0) { + struct xhci_stream_ctx *sctx; + + /* + * Stream IDs of 0, 65535 (any stream), and 65534 + * (prime) are invalid. + */ + if (streamid == 0 || streamid == 65534 || streamid == 65535) { + DPRINTF(("pci_xhci: invalid stream %u\r\n", streamid)); + return; + } + + sctx = NULL; + pci_xhci_find_stream(sc, ep_ctx, streamid, &sctx); + if (sctx == NULL) { + DPRINTF(("pci_xhci: invalid stream %u\r\n", streamid)); + return; + } sctx_tr = &devep->ep_sctx_trbs[streamid]; ringaddr = sctx_tr->ringaddr; ccs = sctx_tr->ccs; @@ -1931,6 +1953,10 @@ pci_xhci_device_doorbell(struct pci_xhci_softc *sc, ui streamid, ep_ctx->qwEpCtx2 & XHCI_TRB_3_CYCLE_BIT, trb->dwTrb3 & XHCI_TRB_3_CYCLE_BIT)); } else { + if (streamid != 0) { + DPRINTF(("pci_xhci: invalid stream %u\r\n", streamid)); + return; + } ringaddr = devep->ep_ringaddr; ccs = devep->ep_ccs; trb = devep->ep_tr; Modified: releng/11.3/usr.sbin/bhyve/pci_xhci.c ============================================================================== --- releng/11.3/usr.sbin/bhyve/pci_xhci.c Wed Jul 24 12:55:16 2019 (r350284) +++ releng/11.3/usr.sbin/bhyve/pci_xhci.c Wed Jul 24 12:56:06 2019 (r350285) @@ -1900,6 +1900,11 @@ pci_xhci_device_doorbell(struct pci_xhci_softc *sc, ui return; } + if (epid == 0 || epid >= XHCI_MAX_ENDPOINTS) { + DPRINTF(("pci_xhci: invalid endpoint %u\r\n", epid)); + return; + } + dev = XHCI_SLOTDEV_PTR(sc, slot); devep = &dev->eps[epid]; dev_ctx = pci_xhci_get_dev_ctx(sc, slot); @@ -1925,6 +1930,23 @@ pci_xhci_device_doorbell(struct pci_xhci_softc *sc, ui /* get next trb work item */ if (XHCI_EPCTX_0_MAXP_STREAMS_GET(ep_ctx->dwEpCtx0) != 0) { + struct xhci_stream_ctx *sctx; + + /* + * Stream IDs of 0, 65535 (any stream), and 65534 + * (prime) are invalid. + */ + if (streamid == 0 || streamid == 65534 || streamid == 65535) { + DPRINTF(("pci_xhci: invalid stream %u\r\n", streamid)); + return; + } + + sctx = NULL; + pci_xhci_find_stream(sc, ep_ctx, streamid, &sctx); + if (sctx == NULL) { + DPRINTF(("pci_xhci: invalid stream %u\r\n", streamid)); + return; + } sctx_tr = &devep->ep_sctx_trbs[streamid]; ringaddr = sctx_tr->ringaddr; ccs = sctx_tr->ccs; @@ -1933,6 +1955,10 @@ pci_xhci_device_doorbell(struct pci_xhci_softc *sc, ui streamid, ep_ctx->qwEpCtx2 & XHCI_TRB_3_CYCLE_BIT, trb->dwTrb3 & XHCI_TRB_3_CYCLE_BIT)); } else { + if (streamid != 0) { + DPRINTF(("pci_xhci: invalid stream %u\r\n", streamid)); + return; + } ringaddr = devep->ep_ringaddr; ccs = devep->ep_ccs; trb = devep->ep_tr; Modified: releng/12.0/usr.sbin/bhyve/pci_xhci.c ============================================================================== --- releng/12.0/usr.sbin/bhyve/pci_xhci.c Wed Jul 24 12:55:16 2019 (r350284) +++ releng/12.0/usr.sbin/bhyve/pci_xhci.c Wed Jul 24 12:56:06 2019 (r350285) @@ -1900,6 +1900,11 @@ pci_xhci_device_doorbell(struct pci_xhci_softc *sc, ui return; } + if (epid == 0 || epid >= XHCI_MAX_ENDPOINTS) { + DPRINTF(("pci_xhci: invalid endpoint %u\r\n", epid)); + return; + } + dev = XHCI_SLOTDEV_PTR(sc, slot); devep = &dev->eps[epid]; dev_ctx = pci_xhci_get_dev_ctx(sc, slot); @@ -1925,6 +1930,23 @@ pci_xhci_device_doorbell(struct pci_xhci_softc *sc, ui /* get next trb work item */ if (XHCI_EPCTX_0_MAXP_STREAMS_GET(ep_ctx->dwEpCtx0) != 0) { + struct xhci_stream_ctx *sctx; + + /* + * Stream IDs of 0, 65535 (any stream), and 65534 + * (prime) are invalid. + */ + if (streamid == 0 || streamid == 65534 || streamid == 65535) { + DPRINTF(("pci_xhci: invalid stream %u\r\n", streamid)); + return; + } + + sctx = NULL; + pci_xhci_find_stream(sc, ep_ctx, streamid, &sctx); + if (sctx == NULL) { + DPRINTF(("pci_xhci: invalid stream %u\r\n", streamid)); + return; + } sctx_tr = &devep->ep_sctx_trbs[streamid]; ringaddr = sctx_tr->ringaddr; ccs = sctx_tr->ccs; @@ -1933,6 +1955,10 @@ pci_xhci_device_doorbell(struct pci_xhci_softc *sc, ui streamid, ep_ctx->qwEpCtx2 & XHCI_TRB_3_CYCLE_BIT, trb->dwTrb3 & XHCI_TRB_3_CYCLE_BIT)); } else { + if (streamid != 0) { + DPRINTF(("pci_xhci: invalid stream %u\r\n", streamid)); + return; + } ringaddr = devep->ep_ringaddr; ccs = devep->ep_ccs; trb = devep->ep_tr;
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