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AKwUvBwFh88co9Tgn3HhS6nIPuEiJlbF3pC4bgLKIqS4Us4MthgaxgpDBu7dotd1+o+5BbIReAk7N3uoQhDX40M=@vger.kernel.org X-Gm-Message-State: AFuF++nX2wa5dELr1hy2qkeAmCIXWquN+Wp+0z64/EA4N9SN514K+w3e D7h4edvbke3pKHLi0H79pBHbBGKZlNYAlX/38yY/jN11QWKacBf9g06+J5kWCn2av6EI7+fzaBe iIIFDuZPBdZH25mJcZca8zFmw4WXRSEsQxIPn0Zx/xRo6sXZTJw76zJXnh/0= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:4f6a:b0:4c2:c244:72f9 with SMTP id 5614622812f47-4c7b52a80dfmr3904791b6e.24.1789430489924; Mon, 14 Sep 2026 17:01:29 -0700 (PDT) Date: Mon, 14 Sep 2026 17:01:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aa88ad9.4c28b7d0.c1bba.0024.GAE@google.com> Subject: [syzbot] [kernel?] upstream test error: WARNING in rcu_tasks_verify_work_fn From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@kernel.org, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 08df884136f1 Merge tag 'thermal-7.3-rc3' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15d8679e580000 kernel config: https://syzkaller.appspot.com/x/.config?x=85bc5cc2fc7394d9 dashboard link: https://syzkaller.appspot.com/bug?extid=9d7ab3bc11055d9740f5 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/08145c70959e/disk-08df8841.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5db70c770722/vmlinux-08df8841.xz kernel image: https://storage.googleapis.com/syzbot-assets/ec39950e39cb/bzImage-08df8841.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9d7ab3bc11055d9740f5@syzkaller.appspotmail.com call_rcu_tasks() has failed boot-time tests. rcu_tasks: RTGS_WAIT_SCAN_HOLDOUTS(6) since 24 g:5 i:0 kCuUP l:25 ------------[ cut here ]------------ ret < 0 WARNING: kernel/rcu/tasks.h:1541 at rcu_tasks_verify_self_tests kernel/rcu/tasks.h:1541 [inline], CPU#1: kworker/1:2/56 WARNING: kernel/rcu/tasks.h:1541 at rcu_tasks_verify_work_fn+0x1b6/0x270 kernel/rcu/tasks.h:1553, CPU#1: kworker/1:2/56 Modules linked in: CPU: 1 UID: 0 PID: 56 Comm: kworker/1:2 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events rcu_tasks_verify_work_fn RIP: 0010:rcu_tasks_verify_self_tests kernel/rcu/tasks.h:1541 [inline] RIP: 0010:rcu_tasks_verify_work_fn+0x1b6/0x270 kernel/rcu/tasks.h:1553 Code: 80 3c 10 00 0f 85 b5 00 00 00 48 8b 35 9b 91 7d 0c b9 64 00 00 00 bf 08 00 00 00 48 c7 c2 a0 8a 99 9b e8 ad 6c e2 ff eb 97 90 <0f> 0b 90 eb 91 48 89 df e8 7d 82 8f 00 e9 69 ff ff ff 48 89 df e8 RSP: 0000:ffffc9000110fbb0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffff8edeb8a8 RCX: 0000000000000000 RDX: 1ffffffff1dbd715 RSI: ffffffff81e97409 RDI: fffff52000221f49 RBP: 1ffff92000221f76 R08: 0000000000000007 R09: 0000000000000000 R10: 8000000000000000 R11: 0000000000000001 R12: 0000000000000bb8 R13: 00000000ffffffff R14: 0000000000000001 R15: ffffffff8edeb8a8 FS: 0000000000000000(0000) GS:ffff888123c60000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000eb96000 CR4: 00000000003526f0 Call Trace: process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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