From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E323B299920; Sat, 12 Sep 2026 09:50:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789206659; cv=none; b=IDJEIhn5p1sZQaBGgEtbdcuySoHPvFHhPQd3s8WXnW7qfOLiAK0/1mIyr6/5JrQnzeIt8bGr/ef+PM0aFjsPWivWp0w9THpWbUMDS0G9IHK3pHCwudS58bTUeH6v3y+Hl9nUF5RMQgRpeyKVvHYhmALlVKE/2718xoy4FhtpAew= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789206659; c=relaxed/simple; bh=RGGRaAdRtwdvHTJeK5qzp2AHt7ia0h0Jlq9ILpnRXrE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=fyc0Up04MWnboRRQ27xlVvAJi/y8QFCqvPkNhgsBCEjulWReZnl2vZLKfv1/7hnRxaB4vqJKNFkzyk0hGN5f1Q6Pjz0Zjrs3hAOkugYHGX31dbhqhnzjbQE6/V8we8yI4cDNdmyOhd+/D8xNFoYyqZnmd8J8EV/TvZIc1aJgf40= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=nBJyj8DI; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="nBJyj8DI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9B7A41F000FF; Sat, 12 Sep 2026 09:50:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789206657; bh=NcjWQ5gKZpDCu2mdwneoejr98unB7QIVOUZvpBTY+Hk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=nBJyj8DIc72fAMjozMz6fWbF7FdznHr2F/2KY7+sqxdIm0xdDEzz2enSmCYQ321qk p5JVhbQrPYdzc4gGEeyXSV+JNniaknxhtCtv2hLhYjTNZhNiPJBLfkW68RpPd1gJkm FhbacSXvqXlFauFRY7TgtQTnW7waHI5zDiwWRmEM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= , Thomas Gleixner , Sasha Levin Subject: [PATCH 6.18 0252/1518] y2038: uapi: Use 64-bit __kernel_old_timespec::tv_nsec on x32 Date: Sat, 12 Sep 2026 08:40:21 +0200 Message-ID: <20260912065629.183317888@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065623.398859879@linuxfoundation.org> References: <20260912065623.398859879@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thomas Weißschuh [ Upstream commit 79ced850e549e8c86b772a79ea417a1425b5c04b ] 'struct __kernel_old_timespec' represents the 'native' time ABI of the kernel. On 32-bit systems it uses 32-bit fields and on 64-bit systems it uses 64-bit fields. However the x86 x32 ABI uses the 64-bit time ABI natively. This is correctly handled for the 'tv_sec' fields, through the typedefs of '__kernel_old_time_t' -> '__kernel_long_t' -> 'long long'. The same treatment was missed for 'tv_nsec'. In practice this might not make much of a difference as the value of 'tv_nsec' will always fit into 32 bits and the missing bits fall into the padding of the structure. When introspecting the structure however, a difference can be observed. Switch to 64-bit tv_nsec on x32. No other architectures or ABIs are affected. While this could be interpreted as violating the POSIX requirement of 'timespec::tv_nsec' being 'long': * __kernel_old_timespec is not actually the POSIX timespec type * the requirement is gone in newer versions of POSIX * this matches glibc Fixes: 94c467ddb273 ("y2038: add __kernel_old_timespec and __kernel_old_time_t") Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://patch.msgid.link/20260504-timespec-x32-v2-1-0739c9047fc4@linutronix.de Signed-off-by: Sasha Levin --- include/uapi/linux/time_types.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/uapi/linux/time_types.h b/include/uapi/linux/time_types.h index bcc0002115d39..03a0d8aaadca5 100644 --- a/include/uapi/linux/time_types.h +++ b/include/uapi/linux/time_types.h @@ -30,7 +30,7 @@ struct __kernel_old_timeval { struct __kernel_old_timespec { __kernel_old_time_t tv_sec; /* seconds */ - long tv_nsec; /* nanoseconds */ + __kernel_long_t tv_nsec; /* nanoseconds */ }; struct __kernel_old_itimerval { -- 2.53.0