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 B14B81A3A80 for ; Sat, 3 Oct 2026 01:36:04 +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=1790991366; cv=none; b=PMzBkwSHdEmbN1Ku1YXphLigc3Yz6pduel+naANC4gkAuuj6Ce96s7O1tyhzXzITW91lPP4tKS2MBjAU85k/6pudaznN2njw0kzlQBMHMLgRCb2g+mwuzr5M9kW4fEwyEMxFjzNxosuoKogPOyMC6nwek2QQAaM6XkRJv8cIRBg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790991366; c=relaxed/simple; bh=kS+IMdw/zJVLAbeVBvaSXrpRl8fAJb1pSq2iXRg8Mp4=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=SN/Ntbt2sOLjLeKJjYoRSSkDGhERx0eopWQiBQpcxmBFCop/qGp1PY1Y54L/pTrjYQ1fEmE1PePESTx0HdD3DQOmZcfRnurPCGah9jYshoqewRQdfy6bETRS90vTVCXIRgviN4vtTMWyxSRUj5X13s8l+kDxwmhiTwuiscsFq60= 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 5614622812f47-4b38ea4c6acso34949b6e.1 for ; Fri, 02 Oct 2026 18:36:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1790991363; x=1791596163; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=9YZq8p0clnNKu9eLZZykt9E/56jKgTEN0eN3DxrL4oI=; b=P88a/TNT/m6PkmXlV7zDOb7pp+eEFOnpnWRWZqCvPO84KQb6IuttMZGwoqepIAqw0a I7EdpIHD3yziTLa5QRDizN8SnNEL21+CzA3KtDPVjBRweThBArqpWhw+LgVoOeNWNiuI mEP7tIE+u1aXIgDPHatRLW/2YPtWhJP0L1ciaE5u7rA1cMWV8wG2v7+DLYpWJcr1CK49 RM3nELqM6cQCJRgOb6QyZXnMV4WSq43/pLU0dU66StOmeq7EMUQBBtClYAmD5D1o5X4V gOQs49zgenJfus3wlFR/cuAzf6oRDmuHsAdThnJksApe057DN99oUdJW3EUaTAkDBBnj cVXQ== X-Forwarded-Encrypted: i=1; AKwUvBygJdVK2YdrxRPH6o862JMwTXvKIs1I38w07Bf8MUIb4Zsvi6JIl8o6eNW7z2mTwMH65F96Nln+7a0nY6U=@vger.kernel.org X-Gm-Message-State: AFuF++mlj4F1G3r+rcwUM5IJFA9TPBa7gczgHfmwvwhC25hdtbrbumlQ Xje2GHWxKgoUusTcMn9emmhi1SpqPHfjx/VPcKq30sA5SCbjC3TRpQIdjAtOyUAuOp9RRlutzuY decdTp2J/ub4MmyJMV15ul304+W9GHQhktVY/INEGl++0dHcCzw/P+scYLko= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1315:b0:4e6:76eb:b997 with SMTP id 5614622812f47-4f52a5776f4mr3361491b6e.62.1790991363655; Fri, 02 Oct 2026 18:36:03 -0700 (PDT) Date: Fri, 02 Oct 2026 18:36:03 -0700 In-Reply-To: <20261002230311.102330-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ac05c03.34119e79.2f92f3.000c.GAE@google.com> Subject: Re: [syzbot] [wireless?] KASAN: slab-use-after-free Read in tasklet_action_common From: syzbot To: kartikey406@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: INFO: task hung in ath9k_hif_usb_disconnect INFO: task kworker/1:4:5768 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:24512 pid:5768 tgid:5768 ppid:2 task_flags:0x4288060 flags:0x00080000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 schedule_timeout+0xc0/0x2c0 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common kernel/sched/completion.c:121 [inline] wait_for_common kernel/sched/completion.c:132 [inline] wait_for_completion+0x2ca/0x5e0 kernel/sched/completion.c:153 ath9k_hif_usb_disconnect+0xb8/0x250 drivers/net/wireless/ath/ath9k/hif_usb.c:1419 usb_unbind_interface+0x295/0x9f0 drivers/usb/core/driver.c:461 device_remove drivers/base/dd.c:618 [inline] __device_release_driver drivers/base/dd.c:1349 [inline] device_release_driver_internal+0x4f5/0x880 drivers/base/dd.c:1372 bus_remove_device+0x444/0x560 drivers/base/bus.c:664 device_del+0x524/0x8f0 drivers/base/core.c:3965 usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1478 usb_disconnect+0x346/0x9a0 drivers/usb/core/hub.c:2350 hub_port_connect drivers/usb/core/hub.c:5420 [inline] hub_port_connect_change drivers/usb/core/hub.c:5720 [inline] port_event drivers/usb/core/hub.c:5884 [inline] hub_event+0x1bbb/0x4d30 drivers/usb/core/hub.c:5966 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Showing all locks held in the system: locks held by kworker/0:1/10: 4, on CPU#0: #0: ffff88801b06b140 ((wq_completion)events){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffff88801b06b140 ((wq_completion)events){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffff88801b06b140 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline] #0: ffff88801b06b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479 #1: ffffc900000f7c40 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #1: ffffc900000f7c40 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffffc900000f7c40 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline] #1: ffffc900000f7c40 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479 #2: ffff8880b863bb20 (&rq->__lock){-.-.}-{2:2}, at: sched_submit_work kernel/sched/core.c:7319 [inline] #2: ffff8880b863bb20 (&rq->__lock){-.-.}-{2:2}, at: schedule+0x90/0x2b0 kernel/sched/core.c:7375 #3: ffff8880b8624408 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x57/0x7d0 kernel/sched/psi.c:933 locks held by ksoftirqd/0/15: 2, last CPU#0: #0: ffff8880b863bb20 (&rq->__lock){-.-.}-{2:2}, at: finish_lock_switch kernel/sched/core.c:5261 [inline] #0: ffff8880b863bb20 (&rq->__lock){-.-.}-{2:2}, at: finish_task_switch+0x159/0xc60 kernel/sched/core.c:5382 #1: ffff8880b8624408 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x57/0x7d0 kernel/sched/psi.c:933 locks held by khungtaskd/33: 1, last CPU#1: #0: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871 locks held by getty/5372: 2, on CPU#1: #0: ffff8880328b10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211 locks held by kworker/1:4/5768: 5, on CPU#1: #0: ffff888022aaf540 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffff888022aaf540 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffff888022aaf540 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline] #0: ffff888022aaf540 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479 #1: ffffc90003b9fc40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #1: ffffc90003b9fc40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffffc90003b9fc40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3361 [inline] #1: ffffc90003b9fc40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3479 #2: ffff88802a1b51d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #2: ffff88802a1b51d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4d30 drivers/usb/core/hub.c:5912 #3: ffff88807bbca1d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #3: ffff88807bbca1d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0xfc/0x9a0 drivers/usb/core/hub.c:2341 #4: ffff88807f7b41a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #4: ffff88807f7b41a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock drivers/base/dd.c:1171 [inline] #4: ffff88807f7b41a0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb9/0x880 drivers/base/dd.c:1369 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 33 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:123 nmi_trigger_cpumask_backtrace+0x17d/0x390 lib/nmi_backtrace.c:66 trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x135/0x170 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline] watchdog+0xfd7/0x1030 kernel/hung_task.c:561 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:check_preemption_disabled+0x19/0xd0 lib/smp_processor_id.c:53 Code: 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 65 8b 05 1b 4d ae 07 65 48 8b 0d eb 4c ae 07 85 c9 74 0c <5b> 41 5e 41 5f 5d c3 cc cc cc cc cc 9c 59 f7 c1 00 02 00 00 74 ea RSP: 0018:ffffc90000147bf8 EFLAGS: 00000006 RAX: 0000000000000000 RBX: ffff88801e299f40 RCX: 8000000000000100 RDX: 0000000000000000 RSI: ffffffff8e69f5c6 RDI: ffffffff8c6dad80 RBP: dffffc0000000000 R08: ffffffff907a627f R09: 1ffffffff20f4c4f R10: dffffc0000000000 R11: fffffbfff20f4c50 R12: ffff8880b8624080 R13: 0000000000000286 R14: ffff8880b8624088 R15: ffff88807c9cd158 FS: 0000000000000000(0000) GS:ffff888124cc7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f74059872c0 CR3: 000000000eb48000 CR4: 00000000003526f0 Call Trace: lockdep_recursion_finish kernel/locking/lockdep.c:470 [inline] lockdep_hardirqs_on_prepare+0x19f/0x270 kernel/locking/lockdep.c:4455 trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:78 __tasklet_schedule_common+0xc9/0x110 kernel/softirq.c:858 tasklet_action_common+0x2d7/0x490 kernel/softirq.c:961 handle_softirqs+0x226/0x860 kernel/softirq.c:645 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1099 smpboot_thread_fn+0x565/0xa70 kernel/smpboot.c:160 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Tested on: commit: ff47652a Merge tag 'cifs-fixes-7.3-rc6' of https://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=172edbf5580000 kernel config: https://syzkaller.appspot.com/x/.config?x=23e5acac5c98285f dashboard link: https://syzkaller.appspot.com/bug?extid=e91dc13b1b37759b3d9f compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=137c1725580000