From nobody Sun Feb 8 11:40:45 2026 Received: from mail-lf1-f46.google.com (mail-lf1-f46.google.com [209.85.167.46]) (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 8081114E2E9 for ; Wed, 21 Aug 2024 16:29:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.46 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724257794; cv=none; b=tKldwIlqEO6OSOJxH/whUKndid5LyMDdnyEG3V4G0v9d2pZi/Hm8aILRiAuIQWyfuRmZLVnCoT23B8zMtu+UmAG3rYbxgNanR3R4dmP9Bgjfva9uVPGwC+bHDBXEmtzF7vO10LKGJBLYzM4ykwLIlm6mdVA5uaPArnOFLu83Blk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724257794; c=relaxed/simple; bh=+2F3YQaCGLitcTbNdWyuZTbsn8oeYp3wyShw7o+4Dfc=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=dFmgANvsY0/bgZnjTvM7r/cOXN341Af5El67echNQh7oLGmyEDRHugMcztSGXl1YUaWxyGDhnt8CJYwLd8zI1AnHMVXZkctwbp3ZZztXqmiQbUN/bBe1GPYIihwDeC+n6vZZsJICHA0b5n1Lj22NJROOnMwSY/2HYhhn4pDaJoY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=toblux.com; spf=none smtp.mailfrom=toblux.com; dkim=pass (2048-bit key) header.d=toblux-com.20230601.gappssmtp.com header.i=@toblux-com.20230601.gappssmtp.com header.b=Dntg5lUS; arc=none smtp.client-ip=209.85.167.46 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=toblux.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=toblux.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=toblux-com.20230601.gappssmtp.com header.i=@toblux-com.20230601.gappssmtp.com header.b="Dntg5lUS" Received: by mail-lf1-f46.google.com with SMTP id 2adb3069b0e04-5334832fb94so228861e87.0 for ; Wed, 21 Aug 2024 09:29:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=toblux-com.20230601.gappssmtp.com; s=20230601; t=1724257790; x=1724862590; 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=mQiMkF2LHLJ8ofvZ2BWlH/LDX2/cHbFn/G18VRaMIA0=; b=Dntg5lUSgD1wAJz+cQ0HICy+qFPjL26LwdcYD0DNIwJMeefaTInW2LCnWEIEI2mz74 R/S645kfbW3SbXEtXOeI+BHv7L+eznTVFKj4Xraf0JSnCiXRJYE+WdNZfkJGRMCkHjuM KYRyCyQ5MwAyrLgZqeHKf8oDmgN1owmaKxgUEdArrAykAil5dOealcVWSzp1O9FgI5aM fJBQT0wlAWx7lMkE9VCvjVJfwB2NvjQ7LSGwZizs2ldvTIchDAnM+MyK3Eht9/2T3u3s YGuUVEzhG7oXvvRHjqi9ncCIjvPQeecT5uKHd/bg5poF2ncRBRV2pMaFEdG0l0PgyjOP AZYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1724257790; x=1724862590; 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=mQiMkF2LHLJ8ofvZ2BWlH/LDX2/cHbFn/G18VRaMIA0=; b=AfQy2o8FIX8KY0scIA8Rv7G5adpxLzzUeNaCrR8HdkavyhEJ2oO0bt05iyy6vPc5Q0 brEMB6lC+TqQtgcEXStSzM202KOhmgG0noNAgTj4fEewfMSxEpJNbSx0OHIznQVVnjEL rkriZnpC19lHXpenf+FQ9R/AoOOGnMugC2GVOwk40WmRIn6AaJkPUg+W6/yA4aXhDhYE yFlrI2QfnRUJ0ZzdrzKlRuaGQbxjdJv/UL/sin6AgzU61eH5kT+Lrjjw19ikQ9KP9YAs LXyiSleqKFKyTV7ROvQ/F3GwfGynw2XKaMTdsDNVL4XEU+we2WtOjTf90XaxTLpggwjd qMPw== X-Forwarded-Encrypted: i=1; AJvYcCUjVPPIYozfvflXa22RJbjdBAbHkdKMGWVjiy3zk/eMPtSK/VyWfXAPW8Ijd43ibJHXofQtRkwhcqvvlKE=@vger.kernel.org X-Gm-Message-State: AOJu0YwosS1SxKJdjr0Wc22HoRzp+zK7XzgaE64/CbJDsy0Y65uxMO7+ 2vapYwwBRoqGNnCAXEXd61OXpjgGnTLREARkvsRjG8Uwq6ugfzcwiyh1YkyeOkw= X-Google-Smtp-Source: AGHT+IFHDSmUWk0dq5DuUAdcENAjlQn2DZw21ZX5ZsRsgXG0sXCieYPYQNvWnKVi23rjGRAUfxcBeA== X-Received: by 2002:a05:6512:b99:b0:52f:c438:883c with SMTP id 2adb3069b0e04-5334854a5cemr1026987e87.1.1724257789262; Wed, 21 Aug 2024 09:29:49 -0700 (PDT) Received: from fedora.fritz.box (aftr-82-135-80-228.dynamic.mnet-online.de. [82.135.80.228]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a8678ae3ee8sm105515666b.25.2024.08.21.09.29.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Aug 2024 09:29:48 -0700 (PDT) From: Thorsten Blum To: kent.overstreet@linux.dev, kees@kernel.org, gustavoars@kernel.org Cc: linux-bcachefs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org, Thorsten Blum Subject: [PATCH] bcachefs: Annotate struct bucket_array with __counted_by() Date: Wed, 21 Aug 2024 18:29:22 +0200 Message-ID: <20240821162921.86767-2-thorsten.blum@toblux.com> X-Mailer: git-send-email 2.46.0 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" Add the __counted_by compiler attribute to the flexible array member bucket to improve access bounds-checking via CONFIG_UBSAN_BOUNDS and CONFIG_FORTIFY_SOURCE. Signed-off-by: Thorsten Blum Reviewed-by: Kees Cook --- fs/bcachefs/buckets_types.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/bcachefs/buckets_types.h b/fs/bcachefs/buckets_types.h index c9698cdf866f..a19460a1bb7c 100644 --- a/fs/bcachefs/buckets_types.h +++ b/fs/bcachefs/buckets_types.h @@ -24,7 +24,7 @@ struct bucket_array { u16 first_bucket; size_t nbuckets; size_t nbuckets_minus_first; - struct bucket b[]; + struct bucket b[] __counted_by(nbuckets); }; =20 struct bucket_gens { --=20 2.46.0