From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f79.google.com (mail-ot1-f79.google.com [209.85.210.79]) (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 96E66383327 for ; Tue, 12 May 2026 02:53:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778554408; cv=none; b=o+WqWToYeLAb8982ITKvQ4bHoBTWz93xrGkroek5egmwDa1FUd8DqckdBhZ1Z+uuMXmb1be5DfVGxq0SPtITVsLmTXbPkyciNQQln77SWP5yB6JcjyMlNxjZLK5pJbXXQ3CB1xVpXkgTCTx+M9RoR2oiHZiy4w+Sucr8samrhNc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778554408; c=relaxed/simple; bh=Nh26SE5G1RgBsUSxekyvCQjB89Y+EO+hgcOexzIPU5Q=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=tcm8/4p4QxBUiTJltV6eItm8FEFNyUxrIAboXPonL8xU5nFoiGAsry/RqhYEK36IkXCpad8aQ4CV8PEhCQIjMNySEGeXS+GMvrLzvKVS9W0k9faYlcjkkXyfOmMG4BsfZJL/t/KVPSGPOCPeiv0rAZS7sxh2rb8tcQZdJVWy/Tc= 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=209.85.210.79 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-ot1-f79.google.com with SMTP id 46e09a7af769-7e3a223b936so4375912a34.3 for ; Mon, 11 May 2026 19:53:26 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778554405; x=1779159205; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=/QGtzwCmqqwnunbQCdRaERUuzrE1eH9OvmwOqFeo0C4=; b=i7AWRdVSYNlvXdWW7XtsnDi7VFqtZYmmP3eOI7e+hJV55fY7+af2bi2VUXpGHUEHg0 KKj8iA9FGFLot70Fi9IJDFUiF83Q7/acMyvAGJtFjf7X5WIMH7q5weOv//NU4/Y42PeF Ox67Ov9RzHl38yVlP6N4bggSu0QK8ZTY0vMcylRNv3Z/fnL/Dtbar8iKvoCT1M08yudp ieK702rB4PZ+7PHEFtw5cVxsoWYWHrVtCrBZ/rpZqbyWmm1lR3Q+gv7qftr6205IzDsj Omu5rOjz7lJcwyg58K/90BQkSF0cF2Km8ZJH80TtwlC1wmQK0TCNxKzh0vUE9rHWcoU8 n0KA== X-Forwarded-Encrypted: i=1; AFNElJ/tqma9xH2x27pu87/6kjpp25eLi5POwfIVGaE3TZ1JjYUkwyplKShjQS5ZOu990Pk1asir4yAqyMLuars=@vger.kernel.org X-Gm-Message-State: AOJu0YzYoOHqwABueXgn7boXJAL7s0ZoO5xImcW2ZGcndvDulUx2YRCS A1s4r8+F7S5PpsrD4p0T31/6/ONUDINYjvxMD8XMcSfJB95HmnEBImB7SyiCgiMMBxxIY9PsWRT DpI3+9G9SmElJW45/nMgj8+b7ZzjNOY1suh+A1MteO4FldVZo0v/mrE+TwGQ= 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:c2c7:20b0:69b:5f97:de75 with SMTP id 006d021491bc7-69b5f97def0mr1875587eaf.21.1778554405604; Mon, 11 May 2026 19:53:25 -0700 (PDT) Date: Mon, 11 May 2026 19:53:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a029625.050a0220.14e4b1.0004.GAE@google.com> Subject: [syzbot] [arm?] WARNING in delayed_work_timer_fn (2) From: syzbot To: catalin.marinas@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, will@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 5cbb61bf4168 arm64/fpsimd: ptrace: zero target's fpsimd_st.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=10e45a73980000 kernel config: https://syzkaller.appspot.com/x/.config?x=a834c6344141a58b dashboard link: https://syzkaller.appspot.com/bug?extid=48fc5b35b350240fd465 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/04156ec16593/disk-5cbb61bf.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6bfa041e2c79/vmlinux-5cbb61bf.xz kernel image: https://storage.googleapis.com/syzbot-assets/a92d82d8a79e/Image-5cbb61bf.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+48fc5b35b350240fd465@syzkaller.appspotmail.com ------------[ cut here ]------------ workqueue: cannot queue hci_cmd_timeout on wq hci4 WARNING: kernel/workqueue.c:2298 at __queue_work+0xf6c/0x12f8 kernel/workqueue.c:2296, CPU#1: syz.3.1091/10273 Modules linked in: CPU: 1 UID: 0 PID: 10273 Comm: syz.3.1091 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __queue_work+0xf6c/0x12f8 kernel/workqueue.c:2296 lr : __queue_work+0xf6c/0x12f8 kernel/workqueue.c:2296 sp : ffff80008e8e7b10 x29: ffff80008e8e7b50 x28: dfff800000000000 x27: ffff700011d1cf84 x26: ffff0000c9d69800 x25: 0000000000000008 x24: ffff0000c9d699c0 x23: dfff800000000000 x22: ffff0000db3fba08 x21: 0000000000000100 x20: ffff800089f06000 x19: ffff0000d915ca70 x18: 1fffe00035c25820 x17: ffff8001258ac000 x16: ffff80008e8e0000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000001f53 x10: 0000000000ff0100 x9 : 48aa0a8f34ab2700 x8 : 48aa0a8f34ab2700 x7 : ffff8000804886d0 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000802f13b0 x2 : 0000000000000101 x1 : ffff0000db3fba00 x0 : 0000000000000000 Call trace: __queue_work+0xf6c/0x12f8 kernel/workqueue.c:2296 (P) delayed_work_timer_fn+0x74/0x90 kernel/workqueue.c:2527 call_timer_fn+0x19c/0xa4c kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1794 [inline] __run_timers kernel/time/timer.c:2374 [inline] __run_timer_base+0x554/0x74c kernel/time/timer.c:2386 run_timer_base+0x84/0x1b8 kernel/time/timer.c:2395 run_timer_softirq+0x20/0x48 kernel/time/timer.c:2405 handle_softirqs+0x2e4/0xd34 kernel/softirq.c:622 __do_softirq+0x14/0x20 kernel/softirq.c:656 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:68 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:889 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:73 invoke_softirq kernel/softirq.c:503 [inline] __irq_exit_rcu+0x1ac/0x428 kernel/softirq.c:735 irq_exit_rcu+0x14/0x84 kernel/softirq.c:752 __el1_irq arch/arm64/kernel/entry-common.c:497 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:509 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:514 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:590 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] (P) _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:198 (P) spin_unlock_irqrestore include/linux/spinlock.h:408 [inline] __wake_up_common_lock+0x5c/0x78 kernel/sched/wait.c:127 __wake_up_sync_key+0x20/0x2c kernel/sched/wait.c:192 __unix_dgram_recvmsg+0x2bc/0x898 net/unix/af_unix.c:2612 unix_dgram_recvmsg+0xcc/0xe4 net/unix/af_unix.c:2686 sock_recvmsg_nosec+0x90/0xe8 net/socket.c:1137 ____sys_recvmsg+0x4f8/0x604 net/socket.c:2916 ___sys_recvmsg+0x16c/0x1f4 net/socket.c:2960 do_recvmmsg+0x2a8/0x7e8 net/socket.c:3055 __sys_recvmmsg+0x1e0/0x270 net/socket.c:3129 __do_sys_recvmmsg net/socket.c:3152 [inline] __se_sys_recvmmsg net/socket.c:3145 [inline] __arm64_sys_recvmmsg+0xd0/0xf8 net/socket.c:3145 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 irq event stamp: 1293 hardirqs last enabled at (1292): [] handle_softirqs+0x1cc/0xd34 kernel/softirq.c:606 hardirqs last disabled at (1293): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:140 [inline] hardirqs last disabled at (1293): [] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:174 softirqs last enabled at (24): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1291): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 ---[ end trace 0000000000000000 ]--- IPVS: lc: UDP 224.0.0.2:0 - no destination available IPVS: lc: UDP 224.0.0.2:0 - no destination available IPVS: lc: UDP 224.0.0.2:0 - no destination available IPVS: lc: UDP 224.0.0.2:0 - no destination available IPVS: lc: UDP 224.0.0.2:0 - no destination available IPVS: lc: UDP 224.0.0.2:0 - no destination available IPVS: lc: UDP 224.0.0.2:0 - no destination available IPVS: lc: UDP 224.0.0.2:0 - no destination available IPVS: lc: UDP 224.0.0.2:0 - no destination available --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup