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AFNElJ+zdcPfVDwYe7pF9/I11v2e+ymTqGbzGZK2rk1pQKPONFuZAqXWIHKnwcUVC+sg2HNytoMQJI8QIg==@vger.kernel.org X-Gm-Message-State: AOJu0Yw4jPqML4U2srzDjGWQKo3YwxwoQ0BJbsAtbZz+kvPnwE0Eista PilfMUnEJ/643JbIocwxkd0b+oSfZCWxx/3pwYbFGnrA0D94MCKXVW+mdfAF8LSzE9saFJ99Q0+ As17TeGvu29R3yBcaJDrxd/0vaEHtlwEQUmkLcAi1P37oaWYo33tW/WS/UdQ= Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1903:b0:687:6290:6333 with SMTP id 006d021491bc7-68be8fcba9amr8716062eaf.58.1776175593341; Tue, 14 Apr 2026 07:06:33 -0700 (PDT) Date: Tue, 14 Apr 2026 07:06:33 -0700 In-Reply-To: <69a41fc9.050a0220.3a55be.005a.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69de49e9.a00a0220.468cb.0061.GAE@google.com> Subject: Re: [syzbot] [io-uring?] WARNING in io_wq_put_and_exit From: syzbot To: axboe@kernel.dk, io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: d60bc1401583 Merge tag 'pwrseq-updates-for-v7.1-rc1' of gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=168b7b02580000 kernel config: https://syzkaller.appspot.com/x/.config?x=36e12cb4499e2de4 dashboard link: https://syzkaller.appspot.com/bug?extid=79a4cc863a8db58cd92b compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=123f04ce580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e3bb6cfdd5a9/disk-d60bc140.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7d84405a4b00/vmlinux-d60bc140.xz kernel image: https://storage.googleapis.com/syzbot-assets/de74b233e91c/bzImage-d60bc140.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+79a4cc863a8db58cd92b@syzkaller.appspotmail.com RAX: ffffffffffffffda RBX: 00007f8d42c15fa0 RCX: 00007f8d4299c819 RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000084 RBP: 00007f8d42a32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8d42c15fac R14: 00007f8d42c15fa0 R15: 00007f8d42c15fa0 ------------[ cut here ]------------ !test_bit(IO_WQ_BIT_EXIT, &wq->state) WARNING: io_uring/io-wq.c:1396 at io_wq_put_and_exit+0x8a7/0x9d0 io_uring/io-wq.c:1396, CPU#0: syz.0.19/5987 Modules linked in: CPU: 0 UID: 0 PID: 5987 Comm: syz.0.19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:io_wq_put_and_exit+0x8a7/0x9d0 io_uring/io-wq.c:1396 Code: ff e8 7d bf 17 fd 44 0f b6 74 24 78 31 ff 44 89 f6 e8 bd b9 17 fd 45 84 f6 0f 85 1a fd ff ff e9 67 fd ff ff e8 5a bf 17 fd 90 <0f> 0b 90 e9 00 f8 ff ff e8 8c 5e 83 fd e9 72 f8 ff ff 48 8b 3c 24 RSP: 0018:ffffc900036d7b50 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88807a8fa000 RCX: ffffffff84f04326 RDX: ffff88801e390000 RSI: ffffffff84f04b26 RDI: ffff88801e390000 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000001 R12: 1ffff920006daf8c R13: 0000000000000000 R14: ffff88801e390970 R15: ffff888032be0c18 FS: 00005555898aa500(0000) GS:ffff888124332000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000000c0 CR3: 0000000077c62000 CR4: 00000000003526f0 Call Trace: __io_uring_add_tctx_node+0x3e8/0x4c0 io_uring/tctx.c:174 io_uring_create io_uring/io_uring.c:3063 [inline] io_uring_setup.cold+0x1993/0x1c7e io_uring/io_uring.c:3108 __do_sys_io_uring_setup io_uring/io_uring.c:3142 [inline] __se_sys_io_uring_setup io_uring/io_uring.c:3133 [inline] __x64_sys_io_uring_setup+0xc2/0x170 io_uring/io_uring.c:3133 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8d4299c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe9e8909a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 RAX: ffffffffffffffda RBX: 00007f8d42c15fa0 RCX: 00007f8d4299c819 RDX: 0000000000000000 RSI: 0000200000000080 RDI: 0000000000000084 RBP: 00007f8d42a32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8d42c15fac R14: 00007f8d42c15fa0 R15: 00007f8d42c15fa0 --- 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.