From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 02 Jul 2026 09:08:43 +0200 Received: from mx1.white.stw.pengutronix.de ([185.203.200.13]) by lore.white.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wfBXP-00CAlL-0j for lore@lore.pengutronix.de; Thu, 02 Jul 2026 09:08:43 +0200 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by mx1.white.stw.pengutronix.de (Postfix) with ESMTPS id 0DAF32003DD for ; Thu, 02 Jul 2026 09:08:43 +0200 (CEST) Authentication-Results: mx1.white.stw.pengutronix.de; dkim=pass header.d=lists.infradead.org header.s=bombadil.20210309 header.b=DecJFsUA; spf=pass (mx1.white.stw.pengutronix.de: domain of "barebox-bounces+lore=pengutronix.de@lists.infradead.org" designates 2607:7c80:54:3::133 as permitted sender) smtp.mailfrom="barebox-bounces+lore=pengutronix.de@lists.infradead.org"; dmarc=none DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:Date:Message-Id:Subject:References:In-Reply-To:To: From:Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=dt/LNFVSun4VBBWWVeIFCaLMsEFG+XDynJRd8gBGK+s=; b=DecJFsUASVFZUKwvzrbjQPbb8U YtnACHVyOL2Xvri0k4bWysEV5or64Lca0mHHcLNBbAuaO8mBzNrJIvBHqyps91GH4khtBWq555JZw rFZBd+Dr8pt5OPjv8EKETXRFS7RPWgwnVcnd151L31DcL4+3pgNXQIOSF9f8kkKIXl9qpDbT87GN9 FtheeFR34q7XM07unDuz1CJAPybHtvzz69MWZ/tXCyFhbNs7NzqTrcDwd2cNrxOJ7BiAlr5ZjAeX+ Kste0gdo64uFN3lR8/7R9BDsqJUS+ZYmLlrXgOmEqD3fWnpQMF7is7bD2JLllM5CCEOnJkNDmDVRk zbGyI4gw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wfBWP-00000003hII-2X4w; Thu, 02 Jul 2026 07:07:41 +0000 Received: from mx1.white.stw.pengutronix.de ([185.203.200.13]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wfBWM-00000003hHZ-0LHD for barebox@lists.infradead.org; Thu, 02 Jul 2026 07:07:40 +0000 Received: from drehscheibe.grey.stw.pengutronix.de (drehscheibe.grey.stw.pengutronix.de [IPv6:2a0a:edc0:0:c01:1d::a2]) (Authenticated sender: relay-from-drehscheibe.grey.stw.pengutronix.de) by mx1.white.stw.pengutronix.de (Postfix) with ESMTPSA id 29EF92003DD; Thu, 02 Jul 2026 09:07:36 +0200 (CEST) Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1wfBWK-005hy6-0E; Thu, 02 Jul 2026 09:07:36 +0200 Received: from [::1] (helo=dude02.red.stw.pengutronix.de) by dude02.red.stw.pengutronix.de with esmtp (Exim 4.98.2) (envelope-from ) id 1wfBWK-00000008VEJ-00mS; Thu, 02 Jul 2026 09:07:36 +0200 From: Sascha Hauer To: barebox@lists.infradead.org, Johannes Schneider In-Reply-To: <20260619160918.88315-1-johannes.schneider@leica-geosystems.com> References: <20260619160918.88315-1-johannes.schneider@leica-geosystems.com> Subject: Re: [PATCH 212/212] dma: make dma_mapping_error NULL-device safe Message-Id: <178297605600.2026638.4084219943269273902.b4-ty@pengutronix.de> Date: Thu, 02 Jul 2026 09:07:36 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Mailer: b4 0.14.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260702_000738_279902_C4C23397 X-CRM114-Status: UNSURE ( 3.77 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.9 (-) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: On Fri, 19 Jun 2026 16:09:18 +0000, Johannes Schneider wrote: > PBL callers often pass NULL as dev; NULL deref of dev->dma_mask > reads i.MX8M boot ROM and returns junk byte causing false 'mapping > [...] Content analysis details: (-1.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 0.0 DMARC_MISSING Missing DMARC policy X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-Rspamd-Queue-Id: 0DAF32003DD X-Spamd-Result: default: False [-6.71 / 15.00]; BAYES_HAM(-3.00)[99.99%]; DWL_DNSWL_MED(-2.00)[infradead.org:dkim]; RCVD_DKIM_ARC_DNSWL_MED(-0.50)[]; RCVD_IN_DNSWL_MED(-0.40)[2607:7c80:54:3::133:from,2a0a:edc0:0:1101:1d::28:received]; R_DKIM_ALLOW(-0.20)[lists.infradead.org:s=bombadil.20210309]; MAILLIST(-0.20)[mailman]; R_SPF_ALLOW(-0.20)[+mx:c]; RCVD_IN_DNSWL_LOW(-0.10)[2a0a:edc0:0:c01:1d::a2:received]; MIME_GOOD(-0.10)[text/plain]; HAS_LIST_UNSUB(-0.01)[]; RCVD_TLS_LAST(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; RECEIVED_HELO_LOCALHOST(0.00)[]; ARC_NA(0.00)[]; DMARC_NA(0.00)[pengutronix.de]; MIME_TRACE(0.00)[0:+]; TAGGED_FROM(0.00)[lore=pengutronix.de]; FORGED_RECIPIENTS_MAILLIST(0.00)[]; TO_DN_SOME(0.00)[]; RCVD_COUNT_FIVE(0.00)[5]; FROM_NEQ_ENVFROM(0.00)[s.hauer@pengutronix.de,barebox-bounces@lists.infradead.org]; FROM_HAS_DN(0.00)[]; DKIM_TRACE(0.00)[lists.infradead.org:+]; NEURAL_HAM(-0.00)[-1.000]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; ASN(0.00)[asn:7247, ipnet:2607:7c80:54::/48, country:US]; FORGED_SENDER_MAILLIST(0.00)[] X-Rspamd-Action: no action X-Stat-Signature: 6g6o6eqecumb6xdeb39i4ejeieu5rjej X-Rspamd-Server: mx1 On Fri, 19 Jun 2026 16:09:18 +0000, Johannes Schneider wrote: > PBL callers often pass NULL as dev; NULL deref of dev->dma_mask > reads i.MX8M boot ROM and returns junk byte causing false 'mapping > error'. Treat NULL dev as 'no constraint'. > > Applied, thanks! [212/212] dma: make dma_mapping_error NULL-device safe https://git.pengutronix.de/cgit/barebox/commit/?id=d058dbc760ff (link may not be stable) Best regards, -- Sascha Hauer