From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f197.google.com (mail-oi1-f197.google.com [209.85.167.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 00DC25CDF1 for ; Sun, 18 Jan 2026 22:49:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768776544; cv=none; b=YmqUAL1h0ZTe7fDWwaKuOkvXgJz4OdaxP+qHjTAk7NCZ4ZJYLBiy+boVbBlcrO1OFAm5yJrGkw3wWEJgx/IDp3n3fHEgO2OS0iRdWrLSxLsxx6bRbuo7dq3VS2LWqb134j00UgFKhh5py3FxIhD8M5USesfSfUIzH4FJPrDe+so= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768776544; c=relaxed/simple; bh=rzXlPj2a8mz//0GJzQyQ1wB8CfNQCWgFaMR7Oph0igw=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=t6SJzUH3mNktNQd0bFrJSN+W07dGPONIng5r4KksTwohpHgUJsB79saBcy8Ax0T8lyPDxayb643NE3Haei9hkGQFbQx2rdMYn/qZPaZpPtBGJxmGDLer6qelxZhORQVXoc/gJfWyZPAsE6kJNXMt7MvzbPrXGTR8RWU5KcabZfs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.167.197 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oi1-f197.google.com with SMTP id 5614622812f47-45c9453a27aso4073924b6e.2 for ; Sun, 18 Jan 2026 14:49:02 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768776542; x=1769381342; h=content-transfer-encoding:to:from:subject:message-id:in-reply-to :date:mime-version:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=QjqoTpCRNZ8y4d9lJx7n8wvvs7drr7EYEKEv86F+76Y=; b=MrAVlXkPRsT8O0lLHS+c/QUGFWCE4do/6HZGOG/k35lncvqoZVejyqk4KFrfAwwWX0 wzW/UYtzlYgK93pMMZe2o/Hqgp823tyqhXLZTp5Sp0eFZhN76njRUhtJtJsCWMq1fc+S 2VfzLevyGDlN5ndnJl6+BjaDXB0etpNUgtnT6lRmaPT6ayiryR0aCyabhZQLFz8BgDGX kpbDzHviBvMgVcODGdXbqUuasGLlfLWJUiFaQ2tOfTPZ8lbpWSpVVGSallSRCLIRfvUK q0KZacA41jxany6CWS8lJYitWgLC6Ed02/01zVIAcea2baPIA/HcqZMSX2qhZDsUZmcZ uMrQ== X-Forwarded-Encrypted: i=1; AJvYcCWUf6hLV9x65x+XQHjRSXLd8HUUC6ApfCswFeBi2HjcWitcItcrc57WnfDgwTVEwIWkbst2ClYiXj5N1T0=@vger.kernel.org X-Gm-Message-State: AOJu0YyoS9kXcekXQbChdN/iV8kmEiiwBsIV3q5If/jbQ9DgOi8AaeWd 42zCJEsUdZ6QJDrgx7BUVfHMFS39d4R31unRufuLCJuuOI5ELwT2rcuY3gfG/HSYY4tQCiDoGEK y6ISEOBK5Zvyyy5hEojPB8mekGY9Frhpc6K+WtQ2uEHYqy/mgjsNn+1HGyQo= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:2290:b0:65f:7279:a5bf with SMTP id 006d021491bc7-66118885a6fmr3658764eaf.8.1768776541963; Sun, 18 Jan 2026 14:49:01 -0800 (PST) Date: Sun, 18 Jan 2026 14:49:01 -0800 In-Reply-To: <067fc23b-2d71-4f6c-906c-2ad1991e445an@googlegroups.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <696d635d.a70a0220.34546f.0350.GAE@google.com> Subject: Re: [syzbot] [mm?] INFO: rcu detected stall in sys_execve (6) From: syzbot To: kapoorarnav43@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, syzbot has tested the proposed patch but the reproducer is still triggering= an issue: BUG: workqueue lockup BUG: workqueue lockup - pool cpus=3D1 node=3D0 flags=3D0x0 nice=3D-20 stuck= for 141s! Showing busy workqueues and worker pools: workqueue events: flags=3D0x100 pwq 2: cpus=3D0 node=3D0 flags=3D0x0 nice=3D0 active=3D6 refcnt=3D7 pending: 3*nsim_dev_hwstats_traffic_work, psi_avgs_work, vmstat_shepher= d, ovs_dp_masks_rebalance pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D4 refcnt=3D5 in-flight: 5940:nsim_fib_event_work nsim_fib_event_work ,39:nsim_fib_ev= ent_work nsim_fib_event_work workqueue events_long: flags=3D0x100 pwq 2: cpus=3D0 node=3D0 flags=3D0x0 nice=3D0 active=3D4 refcnt=3D5 pending: 4*defense_work_handler workqueue events_unbound: flags=3D0x2 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D2 refcnt=3D3 in-flight: 3887:toggle_allocation_gate pending: flush_memcg_stats_dwork workqueue events_unbound: flags=3D0x2 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D8 refcnt=3D9 in-flight: 60:cfg80211_wiphy_work ,3910:nsim_dev_trap_report_work ,1136= :nsim_dev_trap_report_work ,4325:nsim_dev_trap_report_work ,3517:cfg80211_w= iphy_work ,1101:nsim_dev_trap_report_work ,3469:crng_reseed pending: nsim_dev_trap_report_work workqueue events_freezable: flags=3D0x104 pwq 2: cpus=3D0 node=3D0 flags=3D0x0 nice=3D0 active=3D1 refcnt=3D2 pending: update_balloon_stats_func workqueue events_power_efficient: flags=3D0x180 pwq 2: cpus=3D0 node=3D0 flags=3D0x0 nice=3D0 active=3D8 refcnt=3D9 in-flight: 794:reg_check_chans_work pending: neigh_managed_work, neigh_periodic_work, 2*check_lifetime, do_= cache_clean, 2*check_lifetime pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D3 in-flight: 5865:neigh_periodic_work ,24:gc_worker workqueue kvfree_rcu_reclaim: flags=3D0xa pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D2 refcnt=3D3 in-flight: 1013:kfree_rcu_monitor pending: kfree_rcu_monitor pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D2 in-flight: 1141:kfree_rcu_monitor workqueue mm_percpu_wq: flags=3D0x8 pwq 2: cpus=3D0 node=3D0 flags=3D0x0 nice=3D0 active=3D1 refcnt=3D2 pending: vmstat_update workqueue writeback: flags=3D0x4a pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D2 in-flight: 4346:wb_workfn workqueue kblockd: flags=3D0x18 pwq 3: cpus=3D0 node=3D0 flags=3D0x0 nice=3D-20 active=3D1 refcnt=3D2 pending: blk_mq_run_work_fn pwq 7: cpus=3D1 node=3D0 flags=3D0x0 nice=3D-20 active=3D2 refcnt=3D3 pending: blk_mq_timeout_work, blk_mq_requeue_work workqueue ipv6_addrconf: flags=3D0x6000a pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D231 in-flight: 340:addrconf_dad_work inactive: 221*addrconf_dad_work, addrconf_verify_work, addrconf_dad_wor= k, 4*addrconf_verify_work workqueue krxrpcd: flags=3D0x2001a pwq 9: cpus=3D0-1 node=3D0 flags=3D0x4 nice=3D-20 active=3D1 refcnt=3D9 pending: rxrpc_peer_keepalive_worker inactive: 5*rxrpc_peer_keepalive_worker workqueue bat_events: flags=3D0x6000a pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D40 pending: batadv_mcast_mla_update inactive: 4*batadv_mcast_mla_update, 7*batadv_iv_send_outstanding_bat_o= gm_packet, 5*batadv_purge_orig, 5*batadv_iv_send_outstanding_bat_ogm_packet= , 5*batadv_tt_purge, batadv_dat_purge, 2*batadv_bla_periodic_work, batadv_d= at_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_w= ork, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge workqueue hci0: flags=3D0x20012 pwq 9: cpus=3D0-1 node=3D0 flags=3D0x4 nice=3D-20 active=3D1 refcnt=3D4 pending: hci_conn_timeout workqueue hci2: flags=3D0x20012 pwq 9: cpus=3D0-1 node=3D0 flags=3D0x4 nice=3D-20 active=3D1 refcnt=3D4 pending: hci_conn_timeout workqueue wg-kex-wg0: flags=3D0x124 pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg0: flags=3D0x6 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg0: flags=3D0x128 pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_encrypt_worker workqueue wg-crypt-wg1: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x0 nice=3D0 active=3D1 refcnt=3D2 in-flight: 9:wg_packet_tx_worker workqueue wg-kex-wg2: flags=3D0x6 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg2: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x0 nice=3D0 active=3D2 refcnt=3D3 in-flight: 5963:wg_packet_tx_worker pending: wg_packet_encrypt_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D5 refcnt=3D6 in-flight: 6465:wg_packet_encrypt_worker wg_packet_encrypt_worker ,5964= :wg_packet_tx_worker wg_packet_tx_worker pending: wg_packet_decrypt_worker workqueue wg-kex-wg0: flags=3D0x6 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D3 refcnt=3D4 in-flight: 1045:wg_packet_handshake_send_worker ,13:wg_packet_handshake= _send_worker wg_packet_handshake_send_worker workqueue wg-crypt-wg1: flags=3D0x128 pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D3 pending: wg_packet_tx_worker, wg_packet_encrypt_worker pool 2: cpus=3D0 node=3D0 flags=3D0x0 nice=3D0 hung=3D64s workers=3D6 idle:= 5889 5941 10 pool 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 hung=3D65s workers=3D7 manag= er: 128 pool 8: cpus=3D0-1 flags=3D0x6 nice=3D0 hung=3D65s workers=3D18 manager: 36= idle: 12 1341 50 Showing backtraces of running workers in stalled CPU-bound worker pools: Tested on: commit: f40ddcc0 Revert "nfc/nci: Add the inconsistency check .. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=3D15a7db9a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3D323fe5bdde2384a= 5 dashboard link: https://syzkaller.appspot.com/bug?extid=3D8bb3e2bee8a429cc7= 6dd compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-= 1~exp1~20250708183702.136), Debian LLD 20.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D143ff5225800= 00