From nobody Sat May 18 21:00:17 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1591356512; cv=none; d=zohomail.com; s=zohoarc; b=GxIlhLL6dmYoKv7+PfiW4lz2oAYOR3QDj9eNLEaFcgHw9Q3kwr/khr0rdjdL5b+HHBSZYxV11NrzpzkH3T2KrMP5jVx7e0yq4Vv2RKLChmnEnaJ3mMcJqT7vXD8VpOgHl19lnA2WrXBT3u2rgukchSMpL4R8KqTwVEpwWpx2xTU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1591356512; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=QWTx3Iur+g/wLWbDzYDLshZvaZWBO0zM7EOG0uIUw90=; b=dncEmIv7OWMf2gHyChXTUiDTKMAl6TKcDRZZCXs1YRYyFlGNDaUVDvJQkXLO9ut3NWRsFnxY5c6kx8tX0LLCkhXm4+nDI0DDjmD+UNCmeWfFvqD3P/sYfLpqXsPsuje0jFls1YsSifc5/16w+z+RElBhi3JhTkUDLfpiyQMIoWQ= ARC-Authentication-Results: i=1; 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Fri, 05 Jun 2020 07:27:39 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-101-sSjkiy1TPpy4WkZiG_9TPw-1; Fri, 05 Jun 2020 07:27:35 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 3E05B18A8223; Fri, 5 Jun 2020 11:27:34 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-113-50.ams2.redhat.com [10.36.113.50]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0CAE760BE2; Fri, 5 Jun 2020 11:27:31 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id ED4721750A; Fri, 5 Jun 2020 13:27:24 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1591356457; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QWTx3Iur+g/wLWbDzYDLshZvaZWBO0zM7EOG0uIUw90=; b=UlM8lffs+57/nu7fZLFl0iObEr2rreXJRy6K9jpYg7TdOBKmmcsJivfuoH763gZrxxjOSB v9lb6nl/gFNzjh7Oi1UXQnNDSnlLF7e5+AElAjHgNoNICTcrGQ1JI4UwKXaBTRtvBaCQ3b ii++xJH+Ifp+F5JWdAmT4aMlvZS9NTk= X-MC-Unique: sSjkiy1TPpy4WkZiG_9TPw-1 From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PULL 1/2] ati-vga: check mm_index before recursive call (CVE-2020-13800) Date: Fri, 5 Jun 2020 13:27:23 +0200 Message-Id: <20200605112724.18622-2-kraxel@redhat.com> In-Reply-To: <20200605112724.18622-1-kraxel@redhat.com> References: <20200605112724.18622-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=207.211.31.81; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/05 03:40:54 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Gerd Hoffmann , Prasad J Pandit Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) From: Prasad J Pandit While accessing VGA registers via ati_mm_read/write routines, a guest may set 's->regs.mm_index' such that it leads to infinite recursion. Check mm_index value to avoid such recursion. Log an error message for wrong values. Reported-by: Ren Ding Reported-by: Hanqing Zhao Reported-by: Yi Ren Message-id: 20200604090830.33885-1-ppandit@redhat.com Suggested-by: BALATON Zoltan Suggested-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Prasad J Pandit Signed-off-by: Gerd Hoffmann --- hw/display/ati.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/hw/display/ati.c b/hw/display/ati.c index 065f197678e4..67604e68deb1 100644 --- a/hw/display/ati.c +++ b/hw/display/ati.c @@ -285,8 +285,11 @@ static uint64_t ati_mm_read(void *opaque, hwaddr addr,= unsigned int size) if (idx <=3D s->vga.vram_size - size) { val =3D ldn_le_p(s->vga.vram_ptr + idx, size); } - } else { + } else if (s->regs.mm_index > MM_DATA + 3) { val =3D ati_mm_read(s, s->regs.mm_index + addr - MM_DATA, size= ); + } else { + qemu_log_mask(LOG_GUEST_ERROR, + "ati_mm_read: mm_index too small: %u\n", s->regs.mm_index); } break; case BIOS_0_SCRATCH ... BUS_CNTL - 1: @@ -520,8 +523,11 @@ static void ati_mm_write(void *opaque, hwaddr addr, if (idx <=3D s->vga.vram_size - size) { stn_le_p(s->vga.vram_ptr + idx, size, data); } - } else { + } else if (s->regs.mm_index > MM_DATA + 3) { ati_mm_write(s, s->regs.mm_index + addr - MM_DATA, data, size); + } else { + qemu_log_mask(LOG_GUEST_ERROR, + "ati_mm_write: mm_index too small: %u\n", s->regs.mm_index= ); } break; case BIOS_0_SCRATCH ... BUS_CNTL - 1: --=20 2.18.4 From nobody Sat May 18 21:00:17 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1591356511; cv=none; d=zohomail.com; s=zohoarc; b=ZCiyl7smNHIbFWa8grTgKj+GT2ypE/+LHLKWcHHwg03V0ZdUgKBFxK6IWtMO091wxR4HplQ+FoJUSgR20cbEsBx2hVaB9do1M/EjPr705PpfWbrS+MzSGAWSc57GDPEinq8uptkdkQO5aaoTQ96ac/pt80KTCzEtEDPifQYrlGU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1591356511; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=PxnD1ipOIfJOImfKqY1XLovMdEfu/muCG2eTysnLsiw=; b=Vp7pM+Eq2pk7ONwkNc6ziweqwopCdyPr4NxDjkopQIxT+bXs1SlcgH24qg/MuSAy+ENFYi7mD6TlLrLIVm5n51FuNkiAJRI0QVGsMDvEMPPF4VDCb78/grOFuhLlUUVYCbqK6a6hBEpwfaaqNzwhQzgDzgBcYbLFR6ws9vpLVpM= ARC-Authentication-Results: i=1; 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Fri, 05 Jun 2020 07:27:36 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-469-bWSR-hh3NVmSfwVYlUaVGw-1; Fri, 05 Jun 2020 07:27:31 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 60A51464; Fri, 5 Jun 2020 11:27:30 +0000 (UTC) Received: from sirius.home.kraxel.org (ovpn-113-50.ams2.redhat.com [10.36.113.50]) by smtp.corp.redhat.com (Postfix) with ESMTP id 121827CCFD; Fri, 5 Jun 2020 11:27:29 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 0203617510; Fri, 5 Jun 2020 13:27:25 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1591356453; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=PxnD1ipOIfJOImfKqY1XLovMdEfu/muCG2eTysnLsiw=; b=EPh0z3qSD+5NRtWceOUq0su1+Eiz6jWIDcNUdjCJnmLqyrD2SuctGEw0ijlC6ZoibA5eDL cbrdARB8al9Q0D5oMzHThKFCYYIeBbW9kM+2ntEfvof0UAIEPVPq5JzsOjOspeoCFMohhY vz967RIeEawxM0h9dXQWcZfTu4bTg1k= X-MC-Unique: bWSR-hh3NVmSfwVYlUaVGw-1 From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PULL 2/2] hw/display/cirrus_vga: Fix code mis-indentation Date: Fri, 5 Jun 2020 13:27:24 +0200 Message-Id: <20200605112724.18622-3-kraxel@redhat.com> In-Reply-To: <20200605112724.18622-1-kraxel@redhat.com> References: <20200605112724.18622-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=207.211.31.81; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/05 03:40:54 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Gerd Hoffmann , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) From: Philippe Mathieu-Daud=C3=A9 While replacing fprintf() by qemu_log_mask() in commit 2b55f4d3504, we incorrectly used a 'tab =3D 4 spaces' alignment, leading to misindented new code. Fix now. Reported-by: Peter Maydell Signed-off-by: Philippe Mathieu-Daud=C3=A9 Message-id: 20200529165436.23573-1-f4bug@amsat.org Signed-off-by: Gerd Hoffmann --- hw/display/cirrus_vga.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/hw/display/cirrus_vga.c b/hw/display/cirrus_vga.c index 92c197cdde1d..212d6f5e6145 100644 --- a/hw/display/cirrus_vga.c +++ b/hw/display/cirrus_vga.c @@ -1032,9 +1032,9 @@ static void cirrus_bitblt_start(CirrusVGAState * s) } else { if (s->cirrus_blt_mode & CIRRUS_BLTMODE_TRANSPARENTCOMP) { if (s->cirrus_blt_pixelwidth > 2) { - qemu_log_mask(LOG_GUEST_ERROR, - "cirrus: src transparent without colorexpand " - "must be 8bpp or 16bpp\n"); + qemu_log_mask(LOG_GUEST_ERROR, + "cirrus: src transparent without colorex= pand " + "must be 8bpp or 16bpp\n"); goto bitblt_ignore; } if (s->cirrus_blt_mode & CIRRUS_BLTMODE_BACKWARDS) { --=20 2.18.4