From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793355995; b=HXv5x3RX3+8MLsSdzxtc86bnRI32OiNr/kvswCv8YAub9ctqmhvG6MSTZcY/sECXc3Zs 8Fs4kMgt1ZIHifxQPV7QX1mfkLmQJ8L/9BzkYCyJ9k2Om3blk4dg/G7MQzp0CByIST9vO BPL36ffhkNsxKCQ3SOKu6cCbJDzKInKM7yqYO4/yNwWJ0b94qvyzBr7tZT7+OmHKUxKTR kgHroBHGlm/8JgFuk8QSSLm878Wjq4xPEZBSJpuWOxqXjvmla/aj1N2O7wW9jT8uGZTyF 2Tk0rf2ewM/udvWEAelkbkWTCYDuK6fYWZ2rZxRl4kFF+QoqFLQY2qPEMwk9K8F9S1Q== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793355995; h=Received:DKIM-Signature:Message-ID:Date:MIME-Version:User-Agent: Subject:To:Cc:References:From:Content-Language:In-Reply-To: Content-Type:Content-Transfer-Encoding; bh=x1C4pyluX7c2DRs0fRkG1SUAzDzrrUCWfmTDf8LAz2M=; b=ENn5+GrCRgEZXOhrTxkKY24bIXOIusIFFQ+KJF1SQHCG9Wrqt53oqwNxu4/FQaQKJAnd Y1DkBubIT2ck2lk2G7LvKBJVw8tXKCwhb29xL2Vgs/W1RFZn7bE3XIVz5nawwlpk8tFl/ ZPHF5vmY25szfWODW9EJWG68VQUoUO15fsrKLJC2JxTMZqAMa5doBR4RVAdVMEZZtj4n6 a3wF4ahifVXfto43UW+xuxovdZVWYlSpa0w5+EppdMT898Zau7FicF26FGFHz8A5nt/GR tOkDEtyxIZyrUvKN1LEnlvsaYwxm1xYvhf69QzG9YMcHO0PdoiSymurFtSam6Tr3IQg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=TH4abygU; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3E166606A31F; Fri, 30 Oct 2026 10:26:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=TH4abygU Received: by smtp.kernel.org (Postfix) with ESMTPSA id AABEF1F00A1B; Fri, 30 Oct 2026 10:26:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793355995; bh=x1C4pyluX7c2DRs0fRkG1SUAzDzrrUCWfmTDf8LAz2M=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=TH4abygUs/Bhz5FGSWuM+/1dmwO8Ylm9Nc6sPLcZsYk/iIC4EXuDBTh2l45MBuvlD kKLRX4d7HgC/UcETBg+C+N7dQ1PhHbj1jUoSZmS9Pyuhp3vTVWyRWIj7dkRA3SOLFF 1Ino0uuohfB2nriqZ0M8Q4KaKRmNWDzsfSxJWtbXUNgfghUPhwdt06LP6M2blPDbzn tQmOhQ5PH4tPH3Xf2JsdLNGpu5YqI6XofxsW3oa5RjqA5/6opuOjGdfMT3hhraomxQ pvA0UOvQyryvEqKPBSGPN4nVFKdPC/OFnhsPXF1+zevt971no3WHRZ0GnWGsKfs2hT 6AIwN9IeuiupQ== Message-ID: <5689c92c-318b-46cb-92d8-429fac9040c4@kernel.org> Date: Fri, 30 Oct 2026 11:26:31 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH bpf-next] bpftool: avoid sign extension in unsigned enum JSON dumps To: Hungyu Lin , bpf@vger.kernel.org Cc: andrii@kernel.org, ast@kernel.org, daniel@iogearbox.net, linux-kernel@vger.kernel.org References: <20261030090913.76944-1-dennylin0707@gmail.com> From: Quentin Monnet Content-Language: en-GB In-Reply-To: <20261030090913.76944-1-dennylin0707@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit 2026-10-30 09:09 UTC+0000 ~ Hungyu Lin > The BTF enum value is stored in a signed 32-bit field even when the > enum is unsigned. Passing it directly to jsonw_uint_field(), which > takes a uint64_t, sign-extends values with bit 31 set. For example, > 0xffffffffU is printed as 18446744073709551615 instead of 4294967295 > by bpftool -j btf dump. > > Cast the value to __u32 before widening it, matching the conversion > already used for plain-text output. > > Fixes: c93cc69004df ("bpftool: add ability to dump BTF types") > Signed-off-by: Hungyu Lin Looks correct, thank you. Acked-by: Quentin Monnet