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=1793717302; b=Xjk8VYik8WsPMI/AU8W9IQio6rdFcJomxN8fxj/VSUvudCCerp4apAtwFLYHkUxAglfQ P2F/YNPXQf/Z3aS3rfIvPp1n7wN7xqecaIclEW6/9Ohm96STCJlWrdaQPH7K+F79uvj1x ayri+yws5sZtB4n6t+AbBpr/HIB9TdVglY8JQC0KSYAU75Ldg8HjBZv3gW1h85+BubMXA /7muCLzFSpTp+UxLGC8+8J5RLalkE54yTCCsihn+BIUkQLf+E5hoOgImVF1bgW6rsHgSi PBiXAOyuu3JOtGasjl/Bqbonjwa+pnnfrS4US43OenzrAp78MKNlpplc9zeTtQlWXEg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793717302; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=mDllQPiaDt7W9nUabOs1aaubEh71hf4xh0JVA1Ds0Qo=; b=L9uKBEc5yBV/dtRQX+hYEHbOYezRXzfD5LdBlMOz1TRsk474hoQR44XQsqlAuwdf3nEf a+nvKJtWeqTdCB/kI8xXGhIbd+QMG7UXtTEzdUSymosc8OIC8vXtwwvdJbyhy+RY39CzZ NmMOrcvDjfoJwELsJtZJW5EAWHCcw/tVJ/8S24hmxdkER1Fygql6JDcG+nwnGwBkNSBc2 BFXK2N5Ws9CKr4ISUNKOh74EOV7yqmCd1OKAfBlWODZs6VN062jeldJwzNF5KNc6ZtQLJ 5iI5iR8emGF4W10s8kRqw6AHHQ+c6vV2Q+0UOR6tVjeDbf2R/2vP3X2SjSjkhRUMUOg== 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=aZQFVLsQ; 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 64B4E606A7A0; Tue, 3 Nov 2026 14:48:22 +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=aZQFVLsQ Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2DEA1F00A1D; Tue, 3 Nov 2026 14:48:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793717302; bh=mDllQPiaDt7W9nUabOs1aaubEh71hf4xh0JVA1Ds0Qo=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=aZQFVLsQSM/JJy7diD15+tL/x+/slfZHNsBHLgIYPNtPog62JjqylkMBb6gBJkiXN 8YNZ5GHXUCxbBxxVc34SjciIfhd9qd03FXJbglkmblnJZ+ktUmrSf9jT9is7H2wS2x shULjdrAYy4v6TNHg87xWMouFG+YMuyhxCYuuodpdcLJxbVYVrIGw1sLPqhUrgPkqv yicgUOsjrgp6LNPHnHnviDvzZPOwY9GU5O3HAIomWFab2PQNIpoE+CSFrgCNxrrUvW hxLxx9Akzs2s93iXVT6Uyuw88VwCWCXGpW7OqZ8I+wEv0uBmmOA0DnKxLjt0OZKcWV tZCMxMvtLkKwg== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH RFC 27/38] sunrpc: make queue_wait a global wait queue again Reply-To: sashiko-reviews@lists.linux.dev To: "Christian Brauner" Cc: "Linus Torvalds" , "Jann Horn" , "Josef Bacik" , "Chris Mason" , "Jeff Layton" , NeilBrown , "Eric Dumazet" , "Thomas Gleixner" , "Al Viro" , "Jonathan Corbet" , "Christoph Hellwig" , "Greg Kroah-Hartman" , "Joel Granados" , "Kees Cook" , "Jan Kara" , "Jan Kara" , linux-s390@vger.kernel.org, coreteam@netfilter.org, kexec@lists.infradead.org, linux-pci@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-usb@vger.kernel.org, samba-technical@lists.samba.org, linux-m68k@lists.linux-m68k.org, linux-serial@vger.kernel.org, "Takashi Iwai" , linux-ext4@vger.kernel.org, "Chuck Lever" , tytso@mit.edu, "Heiko Carstens" , "Vasily Gorbik" , "Alexander Gordeev" , "Christian Borntraeger" In-Reply-To: <20261102-work-procfs-bugfixes-v1-27-59422ed3e465@kernel.org> References: <20261102-work-procfs-bugfixes-v1-0-59422ed3e465@kernel.org> <20261102-work-procfs-bugfixes-v1-27-59422ed3e465@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 03 Nov 2026 14:48:20 +0000 X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > Since commit 552d0e17ea04 ("sunrpc: convert queue_wait from global to > per-cache-detail waitqueue") poll() and epoll queue their waiters for a > channel file on the queue_wait head in struct cache_detail. But the > cache_detail can be freed while its channel file is still open and > waited on. >=20 > The procfs channel files of a network namespace are removed when the > namespace goes away. Removing a procfs file waits for the callers that > are in one of its methods right now and then calls ->release on every > file that is still open (cf. close_pdeo()). The waiters that poll() and > epoll left on the head stay queued until their file is really closed. > So: >=20 > sunrpc_exit_net() > -> ip_map_cache_destroy() > [ ... ] >=20 > Reported-by: Chris Mason > Fixes: 552d0e17ea04 ("sunrpc: convert queue_wait from global to per-cache= -detail waitqueue") > Cc: stable@vger.kernel.org > Signed-off-by: Christian Brauner (Amutable) Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261102-work-procf= s-bugfixes-v1-0-59422ed3e465@kernel.org?part=3D27