From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5A7A9C83F1B for ; Wed, 30 Aug 2023 18:39:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236628AbjH3Siv (ORCPT ); Wed, 30 Aug 2023 14:38:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39226 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242720AbjH3JVm (ORCPT ); Wed, 30 Aug 2023 05:21:42 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 69F1BCCF; Wed, 30 Aug 2023 02:21:39 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 07A126068B; Wed, 30 Aug 2023 09:21:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 241C4C433C8; Wed, 30 Aug 2023 09:21:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1693387298; bh=siIZODpxnuFofigGdK4dwZYoGFyU6ZVlCj0AGqstUXY=; h=From:To:Cc:Subject:Date:From; b=NgYUZygmBVLwFbvipWgScmV9bhRY4kEtxv+LxE1ZR+6xyl9Ra9l+OKjTkwsKUnCLD beOWKm9nyL1Va+AILsLgv0NtwJ2QtqXMLv8ynDEuGiIwgZVZMt16SIOHzWgxPuZsVN xeLpsiLkB27M4lZ/rwqit+jHi9YByXMQjBcgdZxxb19C2y+hzqxYHKYG7Sd6rgWYJB K58+CwM9JjdL3H3y/i5yaHv7FD8sfAfdnK17j8OSiwPXnt7bFmP5S7jI+0rEoCdy1F nppDZS0xW0zmchJck+DBVrBKJVLogG9rnkW+0dtk7EMGUAWgGLjnalXMzHZwviC1QH wy9DkZFZ+4FVw== From: Kalle Valo To: Ross Lagerwall , Bjorn Helgaas Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, ath11k@lists.infradead.org, regressions@lists.linux.dev Subject: [regression v6.5-rc1] PCI: comm "swapper/0" leaking memory Date: Wed, 30 Aug 2023 12:21:34 +0300 Message-ID: <878r9sga1t.fsf@kernel.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Hi, I noticed that starting from v6.5-rc1 my ath11k tests reported several memory leaks from swapper/0: unreferenced object 0xffff88810a02b7a8 (size 96): comm "swapper/0", pid 1, jiffies 4294671838 (age 98.120s) hex dump (first 32 bytes): 80 b8 02 0a 81 88 ff ff b8 72 07 00 00 c9 ff ff .........r...... c8 b7 02 0a 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace: unreferenced object 0xffff88810a02b880 (size 96): comm "swapper/0", pid 1, jiffies 4294671838 (age 98.120s) hex dump (first 32 bytes): 58 b9 02 0a 81 88 ff ff a8 b7 02 0a 81 88 ff ff X............... a0 b8 02 0a 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace: unreferenced object 0xffff88810a02b958 (size 96): comm "swapper/0", pid 1, jiffies 4294671838 (age 98.120s) hex dump (first 32 bytes): 30 ba 02 0a 81 88 ff ff 80 b8 02 0a 81 88 ff ff 0............... 78 b9 02 0a 81 88 ff ff 00 00 00 00 00 00 00 00 x............... backtrace: unreferenced object 0xffff88810a02ba30 (size 96): comm "swapper/0", pid 1, jiffies 4294671838 (age 98.120s) hex dump (first 32 bytes): 08 bb 02 0a 81 88 ff ff 58 b9 02 0a 81 88 ff ff ........X....... 50 ba 02 0a 81 88 ff ff 00 00 00 00 00 00 00 00 P............... backtrace: unreferenced object 0xffff88810a02bb08 (size 96): comm "swapper/0", pid 1, jiffies 4294671838 (age 98.120s) hex dump (first 32 bytes): e0 bb 02 0a 81 88 ff ff 30 ba 02 0a 81 88 ff ff ........0....... 28 bb 02 0a 81 88 ff ff 00 00 00 00 00 00 00 00 (............... backtrace: I can easily reproduce this by doing a simple insmod and rmmod of ath11k and it's dependencies (mac80211, MHI etc). I can reliability reproduce the leaks but I only see them once after a boot, I need to reboot the host to see the leaks again. v6.4 has no leaks. I did a bisect and found the commit below. I verified reverting the commit makes the leaks go away. commit e54223275ba1bc6f704a6bab015fcd2ae4f72572 Author: Ross Lagerwall AuthorDate: Thu May 25 16:32:48 2023 +0100 Commit: Bjorn Helgaas CommitDate: Fri Jun 9 15:06:16 2023 -0500 PCI: Release resource invalidated by coalescing Kalle