From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f80.google.com (mail-oo1-f80.google.com [209.85.161.80]) (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 1BA2C2D3EC1 for ; Tue, 31 Mar 2026 21:53:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774994005; cv=none; b=ey/tEA1Jp4J3bDFREx4wteMVgmezSdJIdLGTvU4n7jhrn1I0mlLXGEgyNdPkR2WtCRL3Yb0svrRA/GvjIzJnTLnJKT+IaUmNk+xn8Hzz79O4AYunhmiU5iV0aA/UcWaxST9tl/SOZ6oe9q5DjOC8Bpe4SNXOhqljIMMJb/bXh5Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774994005; c=relaxed/simple; bh=toc4KnVq0Xm0QhPWoon+trn8ntGU+g7Ft/oOOW86J6s=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=qiw2QdsWkih66F6+R7AZ0xLSKYlzLstQEkcpkstZ2YPISkzG3y5Nu9NezNeZ+TGIcMal0KIqf2CjacyJ4H9rKlH+NK7LThez+kF5CxUN0PhBSR6lhIvExCnwRjkPD+6IDUuf2SJzNHBt+ndsUN5EMYD2xbdOfB/bGioKyYQyobQ= 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=209.85.161.80 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-oo1-f80.google.com with SMTP id 006d021491bc7-67e3eaa8962so4079485eaf.3 for ; Tue, 31 Mar 2026 14:53:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774994003; x=1775598803; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=A9nUT8108Gu5sIC66yMo0iMUqx48OWErO0d7V/9LsdI=; b=MVaJ3gI8XUzE/p+XQwDrpjw5S9h+FP/F7f2CQGLBEwVSfStMgmJPfrFrqQHnjXvRQv hghIx+EAIvaAW8x/CvGTa34Q4XvBB49zUBG4id8IMLNfFjXi93Ob+XbQS31d+caAbHt/ xFvuG3nnZCvpmr6TevJEU/Qr7On6gAaxLOswfxEUgp/Vt1u2x/GWfUP0khpJa0lL9mb/ u8RJQevZyrU8uE7cK9OO9kHYlSxPTbB+ikiK3S5WGGuAV+X88myvx+Y7BvqY5C0P4+0p xfJnKjDL5szPCwdxGrqcve5ArJf7AKPOtBNjsPcSBpRdP+J8tRfB0QvnQ4hCFi1OiRui lg5A== X-Gm-Message-State: AOJu0Yx8jSbMnC+S6QzhV29/G4z2A5iWnFWNX/ITL9Ci5Bc3SCPmnstT 7nloq6H+whkwuHhZG0ewcLgoy7gfUlrNgRJ85TPL8lnW2kSNSFdNti5l0Nrt+dvJG8LxluCSfV2 sqIpytJpMQESSaJe+7QNP1rKxijMSN7rNFJx2SlHp0dQbUh5CaIKtjds0Yv7z+w== 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:f00a:b0:67e:1dee:db4 with SMTP id 006d021491bc7-67fabbd63cdmr564254eaf.14.1774994002883; Tue, 31 Mar 2026 14:53:22 -0700 (PDT) Date: Tue, 31 Mar 2026 14:53:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69cc4252.a70a0220.97f31.02a3.GAE@google.com> Subject: [syzbot] [kernel?] WARNING in rcu_tasks_verify_work_fn From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: b335bc5892a0 riscv: make runtime const not usable by modules 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=17d3a606580000 kernel config: https://syzkaller.appspot.com/x/.config?x=884e3e34df289c dashboard link: https://syzkaller.appspot.com/bug?extid=251e9abcdac140e7ec74 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-b335bc58.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/81d2e116b7f9/vmlinux-b335bc58.xz kernel image: https://storage.googleapis.com/syzbot-assets/da35545356d4/Image-b335bc58.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+251e9abcdac140e7ec74@syzkaller.appspotmail.com cpu1: Ratio of byte access time to unaligned word access is 7.19, unaligned accesses are fast hrtimer: interrupt took 78219600 ns ------------[ cut here ]------------ WARNING: [ret < 0] kernel/rcu/tasks.h:1530 at rcu_tasks_verify_self_tests kernel/rcu/tasks.h:1520 [inline], CPU#1: swapper/0/1 WARNING: [ret < 0] kernel/rcu/tasks.h:1530 at rcu_tasks_verify_work_fn+0x27e/0x31c kernel/rcu/tasks.h:1542, CPU#1: swapper/0/1 Modules linked in: CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT Hardware name: riscv-virtio,qemu (DT) epc : rcu_tasks_verify_self_tests kernel/rcu/tasks.h:1530 [inline] epc : rcu_tasks_verify_work_fn+0x27e/0x31c kernel/rcu/tasks.h:1542 ra : rcu_tasks_verify_self_tests kernel/rcu/tasks.h:1522 [inline] ra : rcu_tasks_verify_work_fn+0x250/0x31c kernel/rcu/tasks.h:1542 epc : ffffffff8036ee1e ra : ffffffff8036edf0 sp : ffff8f8000027b10 gp : ffffffff8a229d40 tp : ffffaf8012afcf80 t0 : 1ffffffff22c0085 t1 : ffffffff8007a85c t2 : ffffffff91600428 s0 : ffff8f8000027bb0 s1 : 0000000000000bb8 a0 : ffffffff887f4a40 a1 : 0000000000000000 a2 : 0000000000000002 a3 : ffffffff803213b0 a4 : 1ffffffff10fe948 a5 : 0000000000000000 a6 : 0000000000000003 a7 : 0000000041b58ab3 s2 : 1ffff1f000004f64 s3 : ffff8f8000027b60 s4 : ffff8f8000027ca0 s5 : ffffffff88614240 s6 : ffffffff887f5060 s7 : 0000000000000000 s8 : 1ffffffff1467758 s9 : 0000000000000000 s10: ffffffff8a33bac0 s11: ffffffff881b2cf0 t3 : ffffffff87fb27e0 t4 : fffff5ef0e594511 t5 : fffff5ef0e594512 t6 : ffffffff86878840 ssp : 0000000000000000 status: 0000000200000120 badaddr: ffffffff8036ee1e cause: 0000000000000003 [] rcu_tasks_verify_self_tests kernel/rcu/tasks.h:1520 [inline] [] rcu_tasks_verify_work_fn+0x27e/0x31c kernel/rcu/tasks.h:1542 [] rcu_tasks_verify_schedule_work+0x9c/0xa8 kernel/rcu/tasks.h:1554 [] do_one_initcall+0x18c/0xcdc init/main.c:1382 [] do_initcall_level init/main.c:1444 [inline] [] do_initcalls init/main.c:1460 [inline] [] do_basic_setup init/main.c:1479 [inline] [] kernel_init_freeable+0x6ca/0x7b0 init/main.c:1692 [] kernel_init+0x28/0x240 init/main.c:1582 [] ret_from_fork_kernel+0x94/0xef8 arch/riscv/kernel/process.c:228 [] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:363 --- 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