From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f77.google.com (mail-ot1-f77.google.com [209.85.210.77]) (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 ACDCA38DC75 for ; Sat, 15 Aug 2026 22:42:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786833761; cv=none; b=nfde2PtiKegt+gZIfgC3ace38vI0wOrXR++DA9T97wyw8uJdFbVn0GgtBBtFxE4RU1DW8yHNGnK4pLYyP+2GWaxITNv/R3t8MVtUZjDEbEAyGIUJu7rLY6bOHxaTSOY7gPhvKXGtGoEawJOze1ULy1kmFv04uhrId0ureaZaWK8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786833761; c=relaxed/simple; bh=taFlypfKrizkgo1VMdBvvtQKRCn6dfhCIfDYFu/Rx/4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=QRRo6KINmM3GdZqmyNMW79HXAbxP345yubpB9lJM4631rwbzIfNKZhhqPCoDMCXuGwR9sPZMC5DFxEIfCF4FmgqDvXg7jDsdpBGmm8FDn/mYqBPX/RQuKu0uflSKtg1jgc9xIpUsK9YSYOYgcclIexFSE6MHpsGXS0E0jvafjtM= 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=209.85.210.77 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-f77.google.com with SMTP id 46e09a7af769-7f4026a59cbso350754a34.1 for ; Sat, 15 Aug 2026 15:42:39 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786833758; x=1787438558; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=2NT73SiAUaTbYTOnE9lEy0UO8wuGbNtq67ysS9z3zuo=; b=hPlxMBr0R3D2erdG5zubrLXK6zhUpIzZpWKDdPXdfM5B65MptGn+p+29c0O0K/iSxd uTxMAbn1xdksMIj085JL2jk1IXil1b0FEM8GuCJfguGLUvNspG5RTESsSGZqH6DjIJ9O 6Zz3LwWuipaWhf+SGKuFF7ZtcL3Kz9srGhsJdY6N3UM7TrgLlSdfAbC+ni5rzNPETlSt xiCq8mczMEBvq6ddoagtXIZWkfTFASdnBbxUKXorPe4oAYvvZCFG1cgKQxXgnFTj9JxK truofN6jSKw90M5F4BN9By6Mev9fI91OTB/JECjrmLBlhtOLMNgHve4d2PXzMbmgwqY5 49xg== X-Gm-Message-State: AOJu0YxlOLLRNB/VF9VKtw4zNXUpNjGYfM/6M9P/eVxGE0nAgGQUj6me IaqDykenV9fUa2v5jQr4xI33u4bFo/ytezmkqq2lBxloznJt2pfF6vf8SlgU6VnnNIeZBNknciI 3nD9Tarj3IGEyBmDr+frmzUe9IuwNSLWfjiQIhpoejHKAxtPuLjoybBIUTviLrg== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4c08:b0:69e:98c0:4bd6 with SMTP id 006d021491bc7-6b0d5fd35a8mr15031996eaf.1.1786833758609; Sat, 15 Aug 2026 15:42:38 -0700 (PDT) Date: Sat, 15 Aug 2026 15:42:38 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a80eb5e.dbb3a75c.20434b.0020.GAE@google.com> Subject: [syzbot] [trace?] INFO: task hung in ftrace_set_clr_event From: syzbot To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, rostedt@goodmis.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: f5bbbfec59b4 Merge tag 'probes-fixes-v7.2-rc7' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12e49079580000 kernel config: https://syzkaller.appspot.com/x/.config?x=aaf0da806f995318 dashboard link: https://syzkaller.appspot.com/bug?extid=1b4a3085f6696737b17c compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=150d92c6580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/08bbc8b1ab0d/disk-f5bbbfec.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/88902debf200/vmlinux-f5bbbfec.xz kernel image: https://storage.googleapis.com/syzbot-assets/6cb284c6dea8/bzImage-f5bbbfec.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1b4a3085f6696737b17c@syzkaller.appspotmail.com INFO: task syz.0.17:6034 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:27496 pid:6034 tgid:6033 ppid:5744 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7326 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7383 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x7bf/0x1550 kernel/locking/mutex.c:821 __ftrace_set_clr_event kernel/trace/trace_events.c:1409 [inline] ftrace_set_clr_event+0x3ba/0x5c0 kernel/trace/trace_events.c:1460 ftrace_event_write+0x1fe/0x2b0 kernel/trace/trace_events.c:1548 vfs_write+0x296/0xba0 fs/read_write.c:685 ksys_write+0x150/0x270 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc695d9e0d9 RSP: 002b:00007fc696c90028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fc696025fa0 RCX: 00007fc695d9e0d9 RDX: 0000000000000002 RSI: 0000200000000040 RDI: 0000000000000003 RBP: 00007fc695e35024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc696026038 R14: 00007fc696025fa0 R15: 00007ffd5a54d898 Showing all locks held in the system: 3 locks held by kworker/u8:0/12: 4 locks held by kworker/1:0/24: #0: ffff88801b02b140 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff88801b02b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #1: ffffc900001e7c40 (reg_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffffc900001e7c40 (reg_work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405 #2: ffffffff90027f40 (rtnl_mutex){+.+.}-{4:4}, at: reg_todo+0x1c/0xa40 net/wireless/reg.c:3205 #3: ffff88806a4807a0 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6884 [inline] #3: ffff88806a4807a0 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_process_self_managed_hints+0x8d/0x160 net/wireless/reg.c:3195 1 lock held by khungtaskd/32: --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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