From nobody Sat Dec 27 13:23:05 2025 Received: from mail-lf1-f47.google.com (mail-lf1-f47.google.com [209.85.167.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8CE5E1426B for ; Tue, 19 Dec 2023 10:02:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="bdNQYv38" Received: by mail-lf1-f47.google.com with SMTP id 2adb3069b0e04-50e34a72660so2899466e87.1 for ; Tue, 19 Dec 2023 02:02:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1702980143; x=1703584943; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=UDfnExpJZu5lDtrGL4NOnG533YvholurjpF0JSG0JHA=; b=bdNQYv38mRfK4iCTNmU55oIGvRLPtVPgbrdtFQj1YDWX2bl0DBQuk2I1FDxrgWyzLQ UPUds96MyOGz2mivRKI9x27qOgSg/ObxZyEvHm73s3E4iLbAK+rJL1cF7jj42RroDom8 gfblqRtPtBR+FFKl3EcVcaDk59MAqse8dpU0xBJQZFmI0em4QK4MQ5W3+WHRWtigcWkh yJ1Jy1shgztXZyIq66vdhhJJxKOsGMO713rNhmlUnG/PmC6K8QfgvFofngQy2i/lJYr2 GsfTeYhMu75kBq7ikbO9ZJEG4O0mbCGQbYGQWbKxuk/eOAoe4sHcq1ISgTJ7P2kh9e7i o5Ew== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702980143; x=1703584943; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=UDfnExpJZu5lDtrGL4NOnG533YvholurjpF0JSG0JHA=; b=xAnhSZJ5rAlCzAy+2HO5ES2WMSyovn8+ENDje2ewpYuueLy4G5aX7Ny2qW5kPQZlo/ w3rhov1xfiiWzcNeIIt1zT4NeAAxRVugu33PI6sVPxWfXx2d6vcYfncNc3JaNp+XQw+E aVhfItoY5TrY8/+65uj8uK1QiIWSbbS8632WMdcGCO9QaK2YBuGEZFvwcE9INdioL1w2 gQ6dMZeeyRcDcb63VmfbACtOH7XyyA5HTw/UCc8/tvNZ3TlEy+cerpThpfoOcy0w34n5 8o5FYb5kJaudascEA4iGk3IT/l9JEQjdXUJQQSlaltR7GIU9rCtmRQTEdDzqJrb0ohq+ Dx8A== X-Gm-Message-State: AOJu0YwcGdlxJ//wB+vR03oODmZBFTUkOtvtfteCf5UktoMdMi9ACkOU jCRigArI20Uf4GW4BVk+BfA= X-Google-Smtp-Source: AGHT+IGGyi36JojkdScUn6fM9cojSilK3uIeYR37ylgaQGGepsG17xKE2lLl8KGvgmI8cf12vBdpMA== X-Received: by 2002:ac2:5e35:0:b0:50e:35e5:f22a with SMTP id o21-20020ac25e35000000b0050e35e5f22amr1537214lfg.16.1702980143419; Tue, 19 Dec 2023 02:02:23 -0800 (PST) Received: from alsp.netis.cc ([2a02:2168:8a0b:bd00:ec0a:381e:719d:789d]) by smtp.googlemail.com with ESMTPSA id s11-20020a056512214b00b0050e4bf426desm42161lfr.246.2023.12.19.02.02.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 Dec 2023 02:02:23 -0800 (PST) From: Alexander Sapozhnikov To: Joerg Roedel , Suravee Suthikulpanit , ToWill Deacon Cc: Alexander Sapozhnikov , iommu@lists.linux.dev, linux-kernel@vger.kernel.org, lvc-project@linuxtesting.org Subject: [PATCH] iommu: amd: NULL value may be dereferenced Date: Tue, 19 Dec 2023 13:02:19 +0300 Message-Id: <20231219100219.17332-1-alsp705@gmail.com> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Pointer 'dom' which was dereferenced at iommu.c:1993=20 is compared to NULL value at iommu.c:1998. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Alexander Sapozhnikov --- drivers/iommu/amd/iommu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index a0924144bac8..64a88e67be9c 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -1985,6 +1985,9 @@ static void amd_iommu_domain_free(struct iommu_domain= *dom) { struct protection_domain *domain; =20 + if (!dom) + return; + domain =3D to_pdomain(dom); =20 if (domain->dev_cnt > 0) --=20 2.40.1