From nobody Wed Feb 11 06:56:54 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1770726197474608.9657869539635; Tue, 10 Feb 2026 04:23:17 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vpmhh-0006N9-Ls; Tue, 10 Feb 2026 07:18:54 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vpmff-0002LK-L5; Tue, 10 Feb 2026 07:16:51 -0500 Received: from isrv.corpit.ru ([212.248.84.144]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vpmfc-0000YT-1x; Tue, 10 Feb 2026 07:16:47 -0500 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 44590187DB5; Tue, 10 Feb 2026 15:14:46 +0300 (MSK) Received: from think4mjt.tls.msk.ru (mjtthink.wg.tls.msk.ru [192.168.177.146]) by tsrv.corpit.ru (Postfix) with ESMTP id D3F09360CDA; Tue, 10 Feb 2026 15:15:41 +0300 (MSK) From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Elhrj Saad , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Michael Tokarev Subject: [Stable-10.1.4 77/95] hw/adc: Fix out-of-bounds write in Aspeed ADC model Date: Tue, 10 Feb 2026 15:14:59 +0300 Message-ID: <20260210121526.68598-3-mjt@tls.msk.ru> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: MIME-Version: 1.0 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=212.248.84.144; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1770726198176154100 From: C=C3=A9dric Le Goater The 'regs' array has ASPEED_ADC_NR_REGS (52) elements, while the memory region covers offsets 0x00-0xFC. The aspeed_adc_engine_write() function has an out-of-bounds write vulnerability when accessing unimplemented registers. Fix this by using 'return' instead of 'break' in the default case, which prevents execution from reaching the s->regs[reg] assignment for unimplemented registers. Reported-by: Elhrj Saad Fixes: 5857974d5d11 ("hw/adc: Add basic Aspeed ADC model") Reviewed-by: Philippe Mathieu-Daud=C3=A9 Link: https://lore.kernel.org/qemu-devel/20260126141820.719492-1-clg@redhat= .com Signed-off-by: C=C3=A9dric Le Goater (cherry picked from commit 4c6521296d2b6820ab1f8c59d3a80cd0c138b2d8) Signed-off-by: Michael Tokarev diff --git a/hw/adc/aspeed_adc.c b/hw/adc/aspeed_adc.c index 3e820cae1e..5f2b8566f5 100644 --- a/hw/adc/aspeed_adc.c +++ b/hw/adc/aspeed_adc.c @@ -228,7 +228,8 @@ static void aspeed_adc_engine_write(void *opaque, hwadd= r addr, uint64_t value, qemu_log_mask(LOG_UNIMP, "%s: engine[%u]: " "0x%" HWADDR_PRIx " 0x%" PRIx64 "\n", __func__, s->engine_id, addr, value); - break; + /* Do not update the regs[] array */ + return; } =20 s->regs[reg] =3D value; --=20 2.47.3