From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr2-f1.google.com (mail-wr2-f1.google.com [74.125.225.65]) (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 B174D35676A for ; Sat, 1 Aug 2026 17:38:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.225.65 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785605893; cv=none; b=EzJMF4TNweAviGKbNcgSHgUmtB0uNTXMPuapQFGt3llWuqsoGWRZP6rKOi7XffTqea+bzRsCKo3FpiaRhyL/zLJ5uJGT90K3F6UoyOzmbsDtBqtORPjr4YCg2dlARlq+PawU4mKrw8Z0eA3NuPWNlrVZqk9/ypkhSqzp4irA41I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785605893; c=relaxed/simple; bh=h1I5cBGaL4NNtruvUDMk6k72yunOA/sUN+iC6Di/G7Q=; h=Mime-Version:Content-Type:Date:Message-Id:Cc:Subject:From:To: References:In-Reply-To; b=UcogRpAFgLsVRwMRVXyLs1Lo86914tEPHAb4faxvqVV47UQEEpnj++3EOS0tfTMmb2DFCDxUe+AVRLIkAWE5e9C0S4H7It1sAQ1NoOTz/xi1KS4hWbJEABQRQprVwRjT9vn6TV8ruaJUZhHfbdt/ya8j0eBEC4IioDPi+c7Rbws= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=mGgsdVI6; arc=none smtp.client-ip=74.125.225.65 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="mGgsdVI6" Received: by mail-wr2-f1.google.com with SMTP id ffacd0b85a97d-47fd1b2021fso662980f8f.1 for ; Sat, 01 Aug 2026 10:38:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1785605890; x=1786210690; darn=vger.kernel.org; h=in-reply-to:references:to:from:subject:cc:message-id:date :content-type:content-transfer-encoding:mime-version:from:to:cc :subject:date:message-id:reply-to:content-type; bh=3nDM0mc96Bzr18k4xoBHNsXxvKjDpatYOwOhRrLaoyo=; b=mGgsdVI6YR+M1FrcqYnt02Rc/Y6TDJiSbOtcpg9qQhYb3gX3LcDq7b50KPjgOXraAq cCtEJQhPKQsAOdEHqUTajSXGtrUsGOH7TY5ZpDwezW4+utkwxAXSs/ATE0x3BFIKs/ar JoCbExesPFxGzYMprEhIw91wrN6PNauKjXXGDdYT1oPGOJ2SnzWqaojmns3DQunFOcca /SQlzIKrgGm/9pchfYIChDj1KRS0PbksPIHmAMMzw/RGxfqyiGh1qRhG7T3bRIXVCmsd wlso9lP0WFhVUh4i1WeVluz/kJgs/NU3YGDlK7iIKff8nUa74XCBWUjkJtR5Mufv0sOW ZANg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785605890; x=1786210690; h=in-reply-to:references:to:from:subject:cc:message-id:date :content-type:content-transfer-encoding:mime-version:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=3nDM0mc96Bzr18k4xoBHNsXxvKjDpatYOwOhRrLaoyo=; b=nzBz8sQC9m5TKn+6YjN1+3RM5tXErJCDCxgGBIlT2Agqf3MxXC1dlZdS+rKAy4GAwF EkYyL1iLNU0GGpmI02bCNhww7b/n3GBaUPgwYppTlTjKCxUmKktHQPDgFE3X5zBj7D61 SqZSMMdIOd7hx3p6eP2UBrYxgmgnqWEc6nthoiCdCUrZrDH9Q/eowID9abpp6EWakjVv EyOCNiGdKNGeSvbfmCPl6ngJT+e3ALV3rB1z/BLT8MswDMRjMZujCaCmiV7odnsKmXdo 6rFBCQWKxbAfmaxfXdm64fU8cdZ0ZW+C3qRkNAd5KodqpdksdODZ4/vjVQ38yFCrk2Zp Mb+g== X-Forwarded-Encrypted: i=1; AHgh+RpWLbotgXkk7X7Xmr+bHqbOutPpiS+Op4FgjTw9aFmonoPrE6ZQKVZZka6nSJoNtzfPx2zrGcRL2Y+yMv4=@vger.kernel.org X-Gm-Message-State: AOJu0YxLHri/haQYKd9PC1/tzSwXADqncf5bW2jL/1xwPTRc9aNmLitN GNyBVZd4csQ2pq7JNrRfvME9Q5kDT365FtlGcZkiltGeUzpaX3Yq05mJ X-Gm-Gg: AR+sD11sgG6SLXKXSn1Fjf2EzADw9WXKM9O5fiXBuYcZ9Cgxq17LHdibVwA5YBzOo6u HddtkttsEqkR8ibIyT/9whWo1KEyBCd64Sca7nGuS3PwwttVp+WqdREM/5vB0qpUV8iLQSpqcka 7NBL1TAcF9iWd+28IozPLmpp7EzvzrjSC0wF4q6j6IbiclxoPXuEysMBngfclPYMXIgQ963fPUv P8Cwk1APK8lmrffr/lRHeC28NCWrcBUg2uTJcpg3SorT4y+IMvaHtJ5mWTkb5EIMYZRGquQYLPC n7KDwbywiYQaWOruImh4fkdgYlBGskL+/b8COnyratlsXIufbHM9ikPPyzk77Y5niHpaylqdF3I 0Q0CcIJsZToUUSIpq4WvNkLtpXFoRAnV8/ZuIokvDtYWugnM9c3vbThCFJ1TdJK2TYocHj1ztqw fQjAXZy1TKuTEffOofvd8Ptr4xXeOuAZQ7/sPCK0Mkrc5R8iBqCEj3UIgpl14lVgxm7ZY7fye25 ivh4yU3LYSr8ju6LByaOv8z07b99ih/d/8dikYETo0hjSzk4vB852ywXNOATlvoQGn9r44Z8rGL wsx0zDqBjlZKwZ71BzmqKnRfXOY= X-Received: by 2002:a5d:4acf:0:b0:47d:f441:5f93 with SMTP id ffacd0b85a97d-47fd72c560bmr6890615f8f.25.1785605889988; Sat, 01 Aug 2026 10:38:09 -0700 (PDT) Received: from localhost (nat-icclus-192-26-29-3.epfl.ch. [192.26.29.3]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-47fd41d17f2sm20504660f8f.2.2026.08.01.10.38.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 01 Aug 2026 10:38:09 -0700 (PDT) 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 Date: Sat, 01 Aug 2026 19:38:08 +0200 Message-Id: Cc: , , , "Alexei Starovoitov" , "Daniel Borkmann" , "Andrii Nakryiko" , "Eduard Zingerman" , "Martin KaFai Lau" , "Song Liu" , "Yonghong Song" , "Emil Tsalapatis" , "Jiri Olsa" , Subject: Re: [PATCH] fsverity: Fix bpf_get_fsverity_digest() dynptr assumptions From: "Kumar Kartikeya Dwivedi" To: "Eric Biggers" X-Mailer: aerc 0.21.0 References: <20260731003925.2728977-1-ebiggers@kernel.org> <20260801171549.GB3567@quark> In-Reply-To: On Sat Aug 1, 2026 at 7:35 PM CEST, Kumar Kartikeya Dwivedi wrote: > On Sat Aug 1, 2026 at 7:15 PM CEST, Eric Biggers wrote: >> On Sat, Aug 01, 2026 at 06:52:45PM +0200, Kumar Kartikeya Dwivedi wrote: >>> > Also correctly handle sizes over INT_MAX, which previously caused an >>> > integer overflow and crash. __bpf_dynptr_size() returns a u64. >>> > >>> >>> I guess this occurs when using file dynptrs? Otherwise the size is capp= ed to >>> DYNPTR_SIZE_MASK. >> >> Yes, though it looks like __bpf_dynptr_data_rw() excludes file dynptrs. >> So this particular issue might be unreachable. Still seems like a good >> idea to match the u64 type that __bpf_dynptr_size() returns though. >> > > I don't see this in patchwork, so you might have to resend this with [PAT= CH > bpf-next] subject again to trigger CI if you want this to go through bpf = tree. > Sorry, [PATCH bpf], rather. >> - Eric