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=1792566291; b=udKLnmkSyrWGs6UGFftolGIe/R22I/qrTucbAbkmfIlanqlOVfu0cPkfhgXsPivJn7Mr 2SUNFNpQOk/q+PQ9Ft6C1H0sXkGYyzkN91lfr1fKrRoqzBqz3MZ7PiT0IQ4iXzhRp+KHu hPGjYI23MyAjgqH2X9hZTR7hG//KgaRrUksjB5uGDb5YsJ0V8WHqAakgtfzioJ9l43YhR nvmWjvONLau6hIJdE21UKtzSz28IoGeYbRp+XnEkhSylXORLvE6wH13LhxoKMFTwXe5kF NWuwJLS6ziMqt+R8Yw+rRj9bJm2LaZ4DAL67ppHlahFo1RQJHqGU01LWZf39h8tIYCQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792566291; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=zDjpm/149iKkzGXPRUz3PfYm6wk52G43lilXI+OIJ0k=; b=sBnT+xuHCgxXtDqjwGFnwxPyrvg1C1LvI/S9pvaoSnbGEaahZgJ5N5D6d6BgyGRmMTZj SHNh2V7zEf2Y1wVIsAVP0Q+UAiaVpH/E7JX9/XR5kYtEtkAuRBhi0DX503PraNc78ytKC 6y/uU1QJPnHWIww+xGtiPV2b2k8O2nkAWeIUww0tPabsxpnQagoSFZZjc9ZcRqlEgo3XW a1DZBY2npQpHiA8giXjM6KQ6b6cUPOJWW/ORtEen03g6gpR5yLURiML+06nSFpJZaaNGq BGCBW1zPZo2NdZI2uYLjI0yHQJqOzmLS58D66Lsu1XcQ/DJ/KngvRhMnV0SOydkjC2g== 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=B2UsvbCt; 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 C0B44606A319; Wed, 21 Oct 2026 07:04:50 +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=B2UsvbCt Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4C9031F000C9; Wed, 21 Oct 2026 07:04:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792566290; bh=zDjpm/149iKkzGXPRUz3PfYm6wk52G43lilXI+OIJ0k=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=B2UsvbCtnwmrpkgD4PNMKuakLy4+xvxTrNhmi+xxtjfKv6caIl7bQpqZR07m9Y1V9 vI5HcXRSen1yzeu7PnKh9wSIlDF3Vs3y0Gb5/LbDEliYcTTP22d7r96kPCCl1w6kVm bY39LbNdO3U/I3niOch95KB2m6XrdwXDkzm+s+xvoTXu0KOIv7/MIazR+GkGIxau+i 4G2AVt8CPrWJPbPhCGeY0TOLstm1VbFNOAl4Utwr7Qh0H8dFV1rESIQ8MsMILQJbdh nZJsTTBPj1K1bxFc/CQlLs+Q/9O6SzjeAfKKgLfKOuCUhLmvbpXA97w/EOhKtabsOm mqN14lIYItK6A== Date: Wed, 21 Oct 2026 00:04:49 -0700 From: Wei Liu To: Jiale Yao Cc: Haiyang Zhang , Wei Liu , Dexuan Cui , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] Drivers: hv: vmbus: Check ACPI companion before use Message-ID: <20261021070449.GA851443@liuwe-devbox-debian-v2.local> References: <20261017064313.3816553-1-yaojiale02@163.com> 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 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261017064313.3816553-1-yaojiale02@163.com> On Sat, Oct 17, 2026 at 02:43:13PM +0800, Jiale Yao wrote: > Platform drivers can be forced to bind to devices outside their match > tables through driver_override. vmbus_acpi_add() assumes that every bound > device has an ACPI companion and dereferences it without checking. > > Return -ENODEV when the companion is absent to avoid a NULL pointer > dereference. > > Signed-off-by: Jiale Yao Applied. Thanks.