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 3083F346ADA for ; Fri, 20 Feb 2026 13:13:32 +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=1771593213; cv=none; b=VtSdMGEgQRR9BdwFOXCmhh80FSVuB0YNbkhVNVLGieIhBbrS3Fq1szwUPj7X9B4JvTH93JvH5JUuvWz+VZZ3tmTNl9DQvARYrdXynm/+nwwrSWZ1BsFm1ncM62GWSBCt0+ib0E3ZqpI01sNuPhNFKgm3MUeRVzzsLBenAxzThRE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771593213; c=relaxed/simple; bh=YpMJQA6u6xE1W/owjHLeo03Cnu82lHWIpNLVCemi9xo=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=mUDFyTwY2Fl8ntVDAo5WmFp8N2kuJl3mtKTvwAINeeLgvzcmq0OLbFaxhGtR0RGB0uuBrGm+j2R9X+NOityItYB7n1oG8+/fxtPTCY5/tBl+yadImOyT5HXTmc0X/UX77CO8KOO5IAHVqSmt6eAbYAXG1CRL2ofrwk7rakoAzbc= 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 5614622812f47-463a7f204a7so20947287b6e.0 for ; Fri, 20 Feb 2026 05:13:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771593211; x=1772198011; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=lj3+Uhg/riZRp3zq9gTNpvwep5S05gMXjhiSmeewkxo=; b=uD8/57K2EmT3n45wLwJHiN1et23bJfnW4W9Wffs9sDKJ2Skybx1lBN8cSVB3X4JjhN jdbenF3IJlRIni0Er6Q9iR59WIX6RR9V9ib88nuiK15PLPCjIHxQFih/EbgWnrNwYcLu rOAiLJO/l465Zr8t3PJn3PD/Wg37RsHaYe9HDNFbqgv+fEVl9JP6TCCQp2LXDJo1unOF mYvB0uY4+uZr3xL4oHqrJ8DYJY0WKvN1kDJadi3N4GP8oG5zkprNa0GJV0oZ5a+DUADS znfaF/8R24v6FrrqHYb1R9in0UCWqfbfNazg2cGIuq8a4ntGvxVtu7TwJbojls2B9ey5 RZsg== X-Gm-Message-State: AOJu0Yyoz3s6+yaz0YZ64AzwaUjFwFaj/x6noEroMpszNF+lIl8pF7Qm CPMGfI5IzmdOPuMboUKVhxb83FMQiOaFk2soZANRB6zMVD5ZHoJm1fGFCiOVYQskmXYGzil6Rsz fFQjOe82QKFWSjGYq6Z6vQgX0z8SyJ5s04VF+4FfTpuuYd0alLrTy2oU7H1I= 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:c115:b0:45f:727:8fe2 with SMTP id 5614622812f47-4643be9c973mr831274b6e.44.1771593211120; Fri, 20 Feb 2026 05:13:31 -0800 (PST) Date: Fri, 20 Feb 2026 05:13:31 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69985dfb.a70a0220.2c38d7.013f.GAE@google.com> Subject: [syzbot] [kernel?] WARNING in request_threaded_irq From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 18be4ca5cb4e riscv: lib: optimize strlen loop efficiency git tree: git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git for-next console output: https://syzkaller.appspot.com/x/log.txt?x=1166f6e6580000 kernel config: https://syzkaller.appspot.com/x/.config?x=781a4eb07921464d dashboard link: https://syzkaller.appspot.com/bug?extid=1f1c9d0fa117b165b233 compiler: riscv64-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 userspace arch: riscv64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/a741b348759c/non_bootable_disk-18be4ca5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c6b87a8d77c4/vmlinux-18be4ca5.xz kernel image: https://storage.googleapis.com/syzbot-assets/d5126373321c/Image-18be4ca5.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1f1c9d0fa117b165b233@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: [irq_settings_is_per_cpu_devid(desc)] kernel/irq/manage.c:2125 at request_threaded_irq+0x320/0x38c kernel/irq/manage.c:2125, CPU#1: syz.0.10/3870 Modules linked in: CPU: 1 UID: 0 PID: 3870 Comm: syz.0.10 Not tainted syzkaller #0 PREEMPT Hardware name: riscv-virtio,qemu (DT) epc : request_threaded_irq+0x320/0x38c kernel/irq/manage.c:2125 ra : request_threaded_irq+0x320/0x38c kernel/irq/manage.c:2125 epc : ffffffff8032d750 ra : ffffffff8032d750 sp : ffff8f800ac67810 gp : ffffffff89f9df20 tp : ffffaf801c74cf80 t0 : ffffffff86391c0a t1 : ffffffff9136c6e0 t2 : ffffffff8016a132 s0 : ffff8f800ac67870 s1 : 0000000000000000 a0 : 0000000000000005 a1 : 0000000000000000 a2 : 0000000000080000 a3 : ffffffff8032d750 a4 : ffff8f8004d6e1e8 a5 : 00000000002041e8 a6 : 0000000000000003 a7 : ffffffff86660460 s2 : 0000000000200000 s3 : ffffaf8011e8d000 s4 : 0000000000000005 s5 : ffffffff84b56ef4 s6 : ffffaf801cd37000 s7 : 0000000000000000 s8 : ffffffff87597e60 s9 : 0000000000020000 s10: ffffaf801cd37000 s11: 0000000000000001 t3 : 0000000000000001 t4 : 0000000000001fff t5 : 00000000000000c8 t6 : 0000000000000002 ssp : 0000000000000000 status: 0000000200000120 badaddr: ffffffff8032d750 cause: 0000000000000003 [] request_threaded_irq+0x320/0x38c kernel/irq/manage.c:2125 [] request_irq include/linux/interrupt.h:176 [inline] [] parport_attach drivers/comedi/drivers/comedi_parport.c:235 [inline] [] parport_attach+0x780/0xb14 drivers/comedi/drivers/comedi_parport.c:224 [] comedi_device_attach+0x350/0x7ec drivers/comedi/drivers.c:1069 [] do_devconfig_ioctl+0x1a2/0x654 drivers/comedi/comedi_fops.c:928 [] comedi_unlocked_ioctl+0x338/0x2c10 drivers/comedi/comedi_fops.c:2240 [] vfs_ioctl fs/ioctl.c:51 [inline] [] __do_sys_ioctl fs/ioctl.c:597 [inline] [] __se_sys_ioctl fs/ioctl.c:583 [inline] [] __riscv_sys_ioctl+0x17c/0x1e4 fs/ioctl.c:583 [] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112 [] do_trap_ecall_u+0x3d2/0x58c arch/riscv/kernel/traps.c:344 [] handle_exception+0x15e/0x16a arch/riscv/kernel/entry.S:232 --- 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