From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=178.62.254.231 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792587750; b=w5j7qrIDLiZzjpNPyFYjhG17gi/0obDu5Xhg4gfBmhNUaH/IUmlAl47DHzhCtiy8OtzI 5qNU02v2SfcdH2QdrLfSXl9H0nrtCA12S/TTM/uFCwvZpRfsrPcQahp9HhcbEfC6oyird i+hHFH9kJg8UABaFVfmMLnT8TYRYx1186wQQnS+ZB2poD5eYOZTwHsL+GnmI0f1Yi2LGv yIBnDqcw2fNaTeq8rIyHKWeqgOr+gzcnionDwZdTYzDFE38cXb6Xh44bN9JASvLmHr4Cz MrBIQt29BL/qxeGBar0XVetZg8gDDFyvRc56x6NPO9tkVrckekyPrmmhXyyEAd+JK4Q== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792587750; h=DMARC-Filter:DKIM-Signature:Received:Date:From:To:Cc:Subject: Message-ID:References:MIME-Version:Content-Type:Content-Disposition: In-Reply-To; bh=R48OF87czPw0TpGGjpU0V3r7D5EariSaDx8Cyx/9Vio=; b=wVGmwBuqCUcVJvaBTKy3GFaan8v+VafC3pkk7vrByXYTNK1vukryBKMuHnsXgDP8g5ln iMwwZk+EakKVqxabBdQAaRL29rOUkCWP/JfLTe0OW/RqO8KHl1IALEiYib4I7YVK8vxdb BfnV+Mz+NK9TvgONLJbhTT5DjbAYV5ZifQpYrRGDhQJMDBZ/vwMK8Aymjr+zhH+5blVEB /POzhurEc9rTl3lA7cMg6qVy4bAnvNEUE2sSmyfZ/akXxzxjW2niXqsai4corlmUiVEIR QBP2h3qushjSCkUjtvQeg2KvBUtJqpe4IxGHhxPkYbIeCltwsBAcGCkkfMG/ZGeOV5g== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=ilvokhin.com; spf=pass smtp.mailfrom=ilvokhin.com; dkim=pass header.d=ilvokhin.com header.i=@ilvokhin.com header.a=rsa-sha256 header.s=mail header.b=tOXjYJ8J; arc=none smtp.remote-ip=178.62.254.231 Received: from mail.ilvokhin.com (mail.ilvokhin.com [178.62.254.231]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 69A15606A319 for ; Wed, 21 Oct 2026 13:02:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 69A15606A319 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=ilvokhin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ilvokhin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=ilvokhin.com header.i=@ilvokhin.com header.a=rsa-sha256 header.s=mail header.b=tOXjYJ8J DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ilvokhin.com; s=mail; t=1792587742; bh=R48OF87czPw0TpGGjpU0V3r7D5EariSaDx8Cyx/9Vio=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=tOXjYJ8JY2P9XMGCzrJpYR52saFWfKXmioqyeU7N90wkTZfPJALrDZa/Q5EJ6AizU h5+PeII4FNATy7bsT7fVygC2i0xeFXdHF0ZtFUOlBqBIogfEaWDRdnt4o0RCXJ0IUO k1CBaJVHzqBVsgFoMUjRIK6S5UOG7B7Nhol3LaFs= Received: from shell.ilvokhin.com (shell.ilvokhin.com [138.68.190.75]) (Authenticated sender: d@ilvokhin.com) by mail.ilvokhin.com (Postfix) with ESMTPSA id 5F5F2FB941; Wed, 21 Oct 2026 13:02:22 +0000 (UTC) Date: Wed, 21 Oct 2026 13:02:18 +0000 From: Dmitry Ilvokhin To: Bart Van Assche Cc: linux-sparse@vger.kernel.org Subject: Re: [PATCH 02/20] ptrlist: Guard against null list in ptrlist operations Message-ID: References: <20261019175633.415493-1-bvanassche@acm.org> <20261019175633.415493-3-bvanassche@acm.org> X-Mailing-List: linux-sparse@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261019175633.415493-3-bvanassche@acm.org> On Mon, Oct 19, 2026 at 10:56:15AM -0700, Bart Van Assche wrote: > Guard against null list pointers before accessing list->rm in ptrlist.h > and ptrlist.c to eliminate undefined behavior and UBSan null member > access traps. > > Signed-off-by: Bart Van Assche Reviewed-by: Dmitry Ilvokhin