From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 192E660A6F74 for ; Tue, 3 Nov 2026 14:48:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=DTggYpfm; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=KNzIAkDc DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Reply-To:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Date: Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Cc:To:Subject: From:Message-ID:MIME-Version:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=IjXeEs0cvKJ9BEkMWj983otFpIRGB9/uiTG6eTej6SY=; b=DTggYpfmDSpBjShzxA6bP2+95W 9nJnIe8oC3GucgbNo+elJqHzIa34WejkH2tligZ7/huZBNy9/PGylUTmtgH/pTfp216E+3pOiwVZ0 15yPr1lRAlBcy9ZhvRULkav/f+OkT5w/+lx7cKDvRmHygdqXblJIPEazDo6NTJe1bTZMu+NVDaER8 xSH31aoz/p5b9UTnVZ3foQ1xs3W52gMy/YMwT2Bg/epSiflLf7JpxudUhswvga4bzoJ55agdMybKW 0284fxzyy2/CWmI9paOsEuaP5SpoBEwwY1JDpMrXWx7I/e3YQsiCOnVYP+6feGTXhypCY4ScS2cgO AQzgzzDw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xOFo8-00000002lLU-3ExV; Tue, 03 Nov 2026 14:48:16 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xOFo4-00000002lFT-1RfA for kexec@lists.infradead.org; Tue, 03 Nov 2026 14:48:12 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id C4448609EF; Tue, 3 Nov 2026 14:48:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1EA6E1F00919; Tue, 3 Nov 2026 14:48:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793717291; bh=IjXeEs0cvKJ9BEkMWj983otFpIRGB9/uiTG6eTej6SY=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=KNzIAkDcTAyZi+bMDBEDiJ2ueX6+YuNBqQcpX4aSHRAYfT+9O1WnTJ+pT4zRQBBHX p25i441sJ/pPELfnxtK22X3a1lcSIwpcUY38RMAWCOPurdhPZg+7wIe+xltR5RL31U u481RToVHFbarFTlUWzAE9MGCxYh1xelMTlElM9jsoGQWFc05EGBAhMboLFT0D6o3c ZdwQlbqPOxICYuQsuQoNiBroU5anKaeSmXCKUvubsHl3FSv4AlbNXkVjqgO6mUx1pR swIa23i3wGX82qen6c30FEla74FnYQVAcQdkulRdqS/OXs8CaHc0ie+cdiYQ5eL3YC V7rdW/Ghfh0qg== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH RFC 22/38] proc: warn about entries left in /proc/net of a dying namespace 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-v1-22-59422ed3e465@kernel.org> References: <20261102-work-procfs-bugfixes-v1-0-59422ed3e465@kernel.org> <20261102-work-procfs-bugfixes-v1-22-59422ed3e465@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Tue, 03 Nov 2026 14:48:09 +0000 X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev Sender: "kexec" X-Spam-Status: No, score=-10.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 X-Archived-By: > proc_net_ns_exit() runs after all the other pernet exits and frees > net->proc_net right after removing "stat" from it. An entry that some > pernet exit forgot to remove is left with a freed ->parent, and so > PDE_NET() hands seq_open_net() and single_open_net() a freed struct net > when the entry is opened through a file descriptor that someone kept. >=20 > There is no such entry in the tree that we know of, but nothing would > tell us about one either. So warn about it like remove_proc_entry() > does for a directory that isn't empty. >=20 > Reported-by: Chris Mason > Fixes: e9720acd728a ("[NET]: Make /proc/net a symlink on /proc/self/net (= v3)") > 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=3D22