From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zeniv.linux.org.uk (zeniv.linux.org.uk [62.89.141.173]) (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 B86DE20CCDC; Wed, 6 May 2026 02:21:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=62.89.141.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778034096; cv=none; b=Qr8Xg6icc5lLZzEk8a0N0mTN8Dyh/+sPfvdv2biHeXN1OHphKCIoyvzgRL3a+YNarI9ZW3auFfTRlOV/ScZ3oLtX7G/G/ZOTXzppmrM6Vq8XfrIJ7tZsF98UgFnUloYzS04w/LmVm4TxoWlDQcqel4J8Jv8dwD3dUlqQMk4YQmE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778034096; c=relaxed/simple; bh=x3WgQ0GtPAwyxJvEgtzHUnkMpQn2VPK21q2th5XcYpo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=BAw5Xuqk8rPSSRkmWWkcQJMFRAA2zqd39yORTrUv2n5DWfm/ynJM6Ht1tp/1xZveCygBwUME7i8qmdG5VaggjEQ3oSsNqdI+AZ7zDSWA3FV3msu/ojnLhMLR+V4BRxcU29+LLzmIzQB4ad1ehEZWA7P7DMt1BC7965YFh4tQmFg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk; spf=none smtp.mailfrom=ftp.linux.org.uk; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b=QWXBzqSg; arc=none smtp.client-ip=62.89.141.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zeniv.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=ftp.linux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b="QWXBzqSg" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linux.org.uk; s=zeniv-20220401; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=OjX7yfRjM0ugHVZowd3jdpL3yzhZGjOSZE42HlX8msw=; b=QWXBzqSg1EHQHZMULm3DllkIir ttVIIgnx2FjdGZARnidTj1I69A385Zl5PgQzNMTRbL8jQH+uUwDP8706mFqJ7jSaG5OlBWzCxqRGa SVx49hM15UzvFkGRY49XNj0TTriSQEzwgpahMxGSPgTY6sJUR6V/uxUtFaKE50w9DSQMmzmed3tId BCRq/+Z8UKCWYPSZlG12eZjhP6yW7GhXwjEo6RNTI2jLyZ+BF+B42HyfpxYXaFNwnDYptnT6jU6QP Iht3OlIflRb7s2g2wWbhmnDvOejaur4vlFOSQ22B5xivyLeloWJkFk5iF7oCph2vGPQUg1NxjrMg+ jgLQK+oQ==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.99.1 #2 (Red Hat Linux)) id 1wKRtY-0000000BQSr-3fJX; Wed, 06 May 2026 02:21:53 +0000 Date: Wed, 6 May 2026 03:21:52 +0100 From: Al Viro To: Vineet Agarwal Cc: Jori Koolstra , brauner@kernel.org, jack@suse.cz, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzbot Subject: Re: [PATCH] fs/namespace: fix NULL pointer dereference in do_lock_mount() Message-ID: <20260506022152.GK3518998@ZenIV> References: <20260505095156.178351-1-agarwal.vineet2006@gmail.com> <20260506021230.GJ3518998@ZenIV> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260506021230.GJ3518998@ZenIV> Sender: Al Viro On Wed, May 06, 2026 at 03:12:30AM +0100, Al Viro wrote: > Do you have a reproducer? Which kernel it is and what .config is used? > Incidentally, do the checks in your patch actually trigger on the setup > you are testing? While we are at it, could you post the stack traces of these oopsen?