From nobody Tue Feb 10 16:27:11 2026 Received: from mail-wm1-f45.google.com (mail-wm1-f45.google.com [209.85.128.45]) (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 8A8D11FAC30 for ; Tue, 3 Dec 2024 17:26:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.45 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733246812; cv=none; b=gDKW+Q/BTQru/Z1cJPAAjTTdFPdRUi0RX96z+61PS/I66L2NL1Ur3RmoxxFJf0j7ZUSgCvE3vC9gkNAw0A9gY7QQvn+oW6csQ5vcGWKL+G4bHgT5dr+sZKajKI/AKNdLph0y9dMaxHyH0jYnD3myTxtUxDPLYTcLHpaKSDIZMZU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733246812; c=relaxed/simple; bh=3m/LMLlH/7jMESx6X9fIIIIib4hfJn5luoPUIkkkDds=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=NGeDuRYbj0u2KUyzyeGPmTjt7w8qcaJnFWy+OoBmPHUeXitj8C9ei09RTQ4NA4lPue3SkW3IbmSjyEK8V8phIcObu3H/zED3AlaeptABgcGS5mlkFDhSguedNNulqMOso5acdDOAUF8owRrmwQtSGXdvIpenXTJKg3o2QGco9Y8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=qygmHYjK; arc=none smtp.client-ip=209.85.128.45 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="qygmHYjK" Received: by mail-wm1-f45.google.com with SMTP id 5b1f17b1804b1-4349ea54db7so56575e9.0 for ; Tue, 03 Dec 2024 09:26:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1733246809; x=1733851609; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=uM3+RQXTMnOQ47ZFii0e33qP4d5w9EjJgy5PSo8ovks=; b=qygmHYjKQarvwNSRKLUHpG64+r89RJ9syZWWveMgWVAAr3lExgEHLY8Zdbj5etLAMI NjRZK/MfCjZFZvRVxm4ruMI0VMGFsgp6REnI/lQSrzIZKxH3fYlJdX4wQlY5pD9eDvzY /bX4sO2JofKUVjmO2z0Z/doBzyGn+0flHjImQbq/tueHYe8qqu0FkfSdMs84/ogb+hC8 /JMFFdD593bzZVSb7k852U4ikdcjLDQdEjRF99MNHVBRKmnIg9mQ5mfvcBfN0Bit0Itn vZBEGmOB2H7E1ZuIs4Tvv78gjrYabb0b2OSSn5xFKQ4/c4qzDLtZ5/dyIrhMj11wtFUh fY+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733246809; x=1733851609; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=uM3+RQXTMnOQ47ZFii0e33qP4d5w9EjJgy5PSo8ovks=; b=WwJCnnKX/XMiEEP5RJZhiRUadAUF4If1Zuo6QKLgcBcb4pc9tDIB8aNzrNTy+EEIMw lbCzYRimlk3WA5UDwhquakyv3swNbCy7vp83ofDm+lrgG7OBopeWF21/rZnK+IwOg6ux 7iXIMFoH17q2UBjLvTmTYkGgPpFqH5+bGtdNmjhMJTGjMKFEzXEEMRzEynPYx2t+J+Lz mE9GrvSA/VjMyiZt0722R3fL83ESTKeSjKt18h5dhpp1EQQ+mlDp4LgUphK5OQPP28eP oR8GS48qZ1lNOJIi7aA3dryCOtdDYiRdZ55La5K5Dg8tT5DM/CIYV7OxJ2KrGQVmwjTC mdaA== X-Forwarded-Encrypted: i=1; AJvYcCWjgFxRWaogYcRaUB1AEdwpU8SUUimXiTBf7nCqLQaEZNOENTiamTfwpcR+83LkgqPSa29uQHJSM0kfhbo=@vger.kernel.org X-Gm-Message-State: AOJu0YyJA89f1mvqn4oo7CzlE7WV9XHiBSw/+KXc3QULacGAgNzClK4M zO4n8j7+9kHvmXcqDVed0oS5eCQgxDNJM/TBDPYfXd6+vDsoaKEPNXmV7cflGw== X-Gm-Gg: ASbGncu0Ou76aDn1snvx505Mtfk+hmjTHus9P6MOqn86un4lCKv6FHD5NrUm5+jWtfK XmeViqNIop3YSNce/CtZTX8Y5HXgnbPHACv80m4RRvj4lR/HWnuEgcFIIXRpjUfctYqrlMqQ946 qPcjABE6qDPWFDkawQB8D8/fFX8OUgU3sfQp3ReFl2FVyTMD0jZhfGoTs+56rZBJA1KMIFAj3hY r7nbmbln0qEKSCV/RIFbmxwcFDcQp/Cr4rgMA== X-Google-Smtp-Source: AGHT+IHah3tfnWDLN3UKIDFtEX6OxzBKzVPQiPV9mkH1uPluyyoiP9zAGpDGGtbXeYMGH6VNL1bEUg== X-Received: by 2002:a7b:cc83:0:b0:434:9d76:5031 with SMTP id 5b1f17b1804b1-434d12b8d88mr1204455e9.1.1733246808530; Tue, 03 Dec 2024 09:26:48 -0800 (PST) Received: from localhost ([2a00:79e0:9d:4:92ba:3294:39ee:2d61]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-385ccd3a522sm15986910f8f.52.2024.12.03.09.26.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Dec 2024 09:26:48 -0800 (PST) From: Jann Horn Date: Tue, 03 Dec 2024 18:25:36 +0100 Subject: [PATCH 2/3] udmabuf: also check for F_SEAL_FUTURE_WRITE Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20241203-udmabuf-fixes-v1-2-f99281c345aa@google.com> References: <20241203-udmabuf-fixes-v1-0-f99281c345aa@google.com> In-Reply-To: <20241203-udmabuf-fixes-v1-0-f99281c345aa@google.com> To: Gerd Hoffmann , Vivek Kasireddy , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , Simona Vetter , John Stultz , Andrew Morton , "Joel Fernandes (Google)" Cc: dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, Jann Horn , stable@vger.kernel.org X-Mailer: b4 0.15-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1733246802; l=976; i=jannh@google.com; s=20240730; h=from:subject:message-id; bh=3m/LMLlH/7jMESx6X9fIIIIib4hfJn5luoPUIkkkDds=; b=C68RSNAz5tSn7/At1pT+/cqpyr2/1yVHxrn2ThIXppaycwhw+jpyJIrVQd0vwYT6uWunp7bMu gPYbSI141ikD1YI6YQFzt61WVCUN7ejJNigEshkNyhdAZUVB/Jcx0OG X-Developer-Key: i=jannh@google.com; a=ed25519; pk=AljNtGOzXeF6khBXDJVVvwSEkVDGnnZZYqfWhP1V+C8= When F_SEAL_FUTURE_WRITE was introduced, it was overlooked that udmabuf must reject memfds with this flag, just like ones with F_SEAL_WRITE. Fix it by adding F_SEAL_FUTURE_WRITE to SEALS_DENIED. Fixes: ab3948f58ff8 ("mm/memfd: add an F_SEAL_FUTURE_WRITE seal to memfd") Cc: stable@vger.kernel.org Signed-off-by: Jann Horn Acked-by: Vivek Kasireddy --- drivers/dma-buf/udmabuf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c index 662b9a26e06668bf59ab36d07c0648c7b02ee5ae..8ce77f5837d71a73be677cad014= e05f29706057d 100644 --- a/drivers/dma-buf/udmabuf.c +++ b/drivers/dma-buf/udmabuf.c @@ -297,7 +297,7 @@ static const struct dma_buf_ops udmabuf_ops =3D { }; =20 #define SEALS_WANTED (F_SEAL_SHRINK) -#define SEALS_DENIED (F_SEAL_WRITE) +#define SEALS_DENIED (F_SEAL_WRITE|F_SEAL_FUTURE_WRITE) =20 static int check_memfd_seals(struct file *memfd) { --=20 2.47.0.338.g60cca15819-goog