From nobody Thu Aug 25 17:32:03 2022 X-Original-To: dev-commits-src-branches@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4MD95008SPz4b3FD; Thu, 25 Aug 2022 17:32:04 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4MD94z6bLYz3MSg; Thu, 25 Aug 2022 17:32:03 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1661448723; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=ciLmn8VY1dPVZmcr+qvI8CT0C3MIA+KUrK/KsqJPyaI=; b=kiFBFmLWTW98d3oiMfrANiTUb4Wg4z6jIOkvTVTAadQaSSSmdh4FzWyfU1ceNqQP2rBu5L zi9aJ434osvgiTBfXCe6NeMiIpaVYLatbxQdzUuu1i4X7d2M5lC8EVz3mO6cdtpsLlW4Oj ZJhTd3L8r1eE7K+0maJWiGMNdGQYx6gcyvnqyLCeICZN2XgJUX3uwWofXE9oPAxB2wilcq +wFz275j3rVP5PHhRQ1zwr0oWCjVyzCp5Lp9oMHYvOK3lMoyHYHlZ7xL08FT7tKlHnLiRw nC/a+U9IEwx/s0g4O3H6dYO3wTXHmRd027tb5qot2FXnUDvdnVj0cwkqTSfkyQ== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4MD94z5W6ZzwFs; Thu, 25 Aug 2022 17:32:03 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 27PHW3Uv046448; Thu, 25 Aug 2022 17:32:03 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 27PHW3PB046447; Thu, 25 Aug 2022 17:32:03 GMT (envelope-from git) Date: Thu, 25 Aug 2022 17:32:03 GMT Message-Id: <202208251732.27PHW3PB046447@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: John Baldwin Subject: git: 10affcbdac73 - stable/12 - bhyve: Validate host PAs used to map passthrough BARs. List-Id: Commits to the stable branches of the FreeBSD src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-branches List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-branches@freebsd.org X-BeenThere: dev-commits-src-branches@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: jhb X-Git-Repository: src X-Git-Refname: refs/heads/stable/12 X-Git-Reftype: branch X-Git-Commit: 10affcbdac737429d8b14697a126ddb2b405917c Auto-Submitted: auto-generated ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1661448723; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=ciLmn8VY1dPVZmcr+qvI8CT0C3MIA+KUrK/KsqJPyaI=; b=cqUw9c8PAdc8lvf5YzP4LMcvvBxIb3NzDE+eF3r6MV91HxNk6ZpfYIeUqElJAWyjGWfQAd VlyU7ERbxypxsSEh6eIaZRr1Jj17e+mbbN4Zd1+te+TWhmNVRJuVDYM1ahTam5kBS4b3jg NJ5f2DFQRtPwXPvy6VDhQ7McmpFbE4zBIPCkJSPz4wA6aNX1+AqDguWEwPuqKUU/wcpaBl 7VNA2u1TlVQSj7OxVGEmB/IphDmbDJUd8d9II2w8DB9IXWbOCxTYXRUbU/AQrX47T71Ewt yGaP3AdGfjg0dY2Xfa5qViy6JcSZXVY+5j2R+N1tthqD1XMl1j/vYZa6WG75iQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1661448723; a=rsa-sha256; cv=none; b=JgSvQofoBTsNPGuUCS7jkr6w2QKNP9TF1Ms6QguPotwfTpzKotY5k43vQbBWP0T0mB0OU4 AcaJVVYy6Fmvnca9pLnSSVESzfPV8tqcJi2eXYitUrFBfsn3utPlUrcx4+hwrmHjYzw67h gegHfTubMYIg49BLcxSUsxLGoNFk08WlDiAm3b3j3zKe02UD9TfEed0ACfGfFWLdFj4mP8 f9+D/238pvAJNsLxzC3QvJTtIADXQHcMqY2ldyKjG3yuMC0yWbR1E5DPlcK1ZNvwTHmj8j dWcj0jHAttqdT9BBxtzCm2SolxeWdZg3c5SPqDah1lSqtIq4cEOXf5m2DiKttw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N The branch stable/12 has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=10affcbdac737429d8b14697a126ddb2b405917c commit 10affcbdac737429d8b14697a126ddb2b405917c Author: John Baldwin AuthorDate: 2022-08-19 21:59:44 +0000 Commit: John Baldwin CommitDate: 2022-08-25 16:40:15 +0000 bhyve: Validate host PAs used to map passthrough BARs. Reject attempts to map host physical address ranges that are not subsets of a passthrough device's BAR into a guest. Reviewed by: markj, emaste MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D36238 (cherry picked from commit c94f30ea85b745a5137471876013f79689e0af03) --- sys/amd64/vmm/io/ppt.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/sys/amd64/vmm/io/ppt.c b/sys/amd64/vmm/io/ppt.c index 4de45ff6d6f9..ee60646db0e7 100644 --- a/sys/amd64/vmm/io/ppt.c +++ b/sys/amd64/vmm/io/ppt.c @@ -439,6 +439,23 @@ ppt_unassign_all(struct vm *vm) return (0); } +static bool +ppt_valid_bar_mapping(struct pptdev *ppt, vm_paddr_t hpa, size_t len) +{ + struct pci_map *pm; + pci_addr_t base, size; + + for (pm = pci_first_bar(ppt->dev); pm != NULL; pm = pci_next_bar(pm)) { + if (!PCI_BAR_MEM(pm->pm_value)) + continue; + base = pm->pm_value & PCIM_BAR_MEM_BASE; + size = (pci_addr_t)1 << pm->pm_size; + if (hpa >= base && hpa + len <= base + size) + return (true); + } + return (false); +} + int ppt_map_mmio(struct vm *vm, int bus, int slot, int func, vm_paddr_t gpa, size_t len, vm_paddr_t hpa) @@ -447,10 +464,17 @@ ppt_map_mmio(struct vm *vm, int bus, int slot, int func, struct pptseg *seg; struct pptdev *ppt; + if (len % PAGE_SIZE != 0 || len == 0 || gpa % PAGE_SIZE != 0 || + hpa % PAGE_SIZE != 0 || gpa + len < gpa || hpa + len < hpa) + return (EINVAL); + error = ppt_find(vm, bus, slot, func, &ppt); if (error) return (error); + if (!ppt_valid_bar_mapping(ppt, hpa, len)) + return (EINVAL); + for (i = 0; i < MAX_MMIOSEGS; i++) { seg = &ppt->mmio[i]; if (seg->len == 0) {