From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f77.google.com (mail-oo1-f77.google.com [209.85.161.77]) (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 BEB662FC000 for ; Mon, 9 Feb 2026 18:26:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.77 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770661588; cv=none; b=bxkuBRdYiUd6sJR2vsKZUYIrnRWwfHWv1mEXOz6Nd/jjMgWqOfJ9QRHf7plkt+yo+1bS0wXp5PId2JbgkAgZkEPlRrjks1+AXGSrRaod7IQuWGgLPn7LOWPtgKMwRRIyThcOneZolhLlBX/oDpHDM6pmi82UFIaEURVWi4swMCE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770661588; c=relaxed/simple; bh=kATcJXYpKadbYPrOB/jOUbVWpAu0Y6sTBp3MryIKec4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=bVdvwQ+Sy0IkgxWti7fBSilEomyISuUN1ulOschU01yRFhhLz8akZ45/EmVvHy3DtM8QmbMtM0dQDTVuxasc7s1JWe1beWm4NN48BvSXDlEj91AhQuIWr6HJirWTFPxHAQ/Sg6vDzyK0hol1rgc2nArrlVw3AqHrpiA6ZbrnfHM= 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=209.85.161.77 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-oo1-f77.google.com with SMTP id 006d021491bc7-66b8c7f0debso16480eaf.3 for ; Mon, 09 Feb 2026 10:26:28 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770661587; x=1771266387; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=d6K6HwARsQ9angFtuKgjbdlRRHqLC0+biKqQLvtr5M0=; b=q4pvL+y8MM6qaw8hBUbCJdCjliYc6Qkt8o+cCD+hm3GyrFhL6vnJXMJZmzMGCdR2qg G0McNkX0GhqaLFXZVAPdjesouHz8A0bULQCr+xAi1x8vzw2wfd+Elg4N6Od6eHIEjLUB +V9p1b9uVTBBbDWVewV5IereJ4ITiM0VR2ZmhGl77G8WSMDdzb/RFAR8Eh+TCIzaZzPH E6/R0Vqs3nsqy7sy2359Lt3h/roRgSDuGMn/CdDW15xZVbfxD30GoHCwaBWuttUq4D7w Yj34eRK43jb8qI4S7px5OOcHFo9E2+DE4BiD/TwINAnhEe3bZ1+xM3vvdp7nRGMQ4TkP x2IQ== X-Forwarded-Encrypted: i=1; AJvYcCXSJbewNr5T3V2UaTlK2WRiak+6S/EPchwEJfMf9+zukJpffXDbZlB+ejY3LLM6wuQ+iK9iZT0lfA==@vger.kernel.org X-Gm-Message-State: AOJu0YyBLQn0HYgUAyuHM/FuF3rNgMSxsgZISBIpAMq2x4NHwnZqt3zh s5VDp2WMyGO2Ws1Mh2ru9hAYHfX7KBCSJ3hjmxiGcdL/5aJMblUScXN2UyNaxTlE3gjsNB5TvJb MJy4gGLMPhgSJCGpCjCsx9f4/loSC7o5pLe7njYZ7QYlxCOuPZB2GFruXEjo= Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:ee18:0:b0:660:ffcf:42e7 with SMTP id 006d021491bc7-66d0a3806cbmr5580323eaf.30.1770661587718; Mon, 09 Feb 2026 10:26:27 -0800 (PST) Date: Mon, 09 Feb 2026 10:26:27 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <698a26d3.050a0220.3b3015.007d.GAE@google.com> Subject: [syzbot] [io-uring?] BUG: corrupted list in io_poll_remove_entries 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" Hello, syzbot found the following issue on: HEAD commit: e7aa57247700 Merge tag 'spi-fix-v6.19-rc8' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14d3b65a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f1fac0919970b671 dashboard link: https://syzkaller.appspot.com/bug?extid=ab12f0c08dd7ab8d057c 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=1222965a580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=140e833a580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/c46beb4ff3a5/disk-e7aa5724.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d162bcaaf9b9/vmlinux-e7aa5724.xz kernel image: https://storage.googleapis.com/syzbot-assets/54b0844b8ea7/bzImage-e7aa5724.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ab12f0c08dd7ab8d057c@syzkaller.appspotmail.com list_del corruption. prev->next should be ffff88807dc6c3f0, but was ffff888146b205c8. (prev=ffff888146b205c8) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:62! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5969 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:__list_del_entry_valid_or_report+0x14a/0x1d0 lib/list_debug.c:62 Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8d 00 00 00 48 8b 55 00 48 89 e9 48 89 de 48 c7 c7 40 3d fa 8b e8 37 b0 32 fc 90 <0f> 0b 4c 89 e7 e8 3c 24 5d fd 48 89 ea 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc90003bffaa8 EFLAGS: 00010082 RAX: 000000000000006d RBX: ffff88807dc6c3f0 RCX: 0000000000000000 RDX: 000000000000006d RSI: ffffffff81e5d6c9 RDI: fffff5200077ff46 RBP: ffff888146b205c8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000001 R11: 0000000000000000 R12: ffff88807dc6c2b0 R13: ffff88807dc6c408 R14: ffff88807dc6c3f0 R15: ffff88807dc6c3c8 FS: 0000000000000000(0000) GS:ffff8881245d9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f60e56708c0 CR3: 000000006b065000 CR4: 00000000003526f0 Call Trace: __list_del_entry_valid include/linux/list.h:132 [inline] __list_del_entry include/linux/list.h:223 [inline] list_del_init include/linux/list.h:295 [inline] io_poll_remove_waitq io_uring/poll.c:149 [inline] io_poll_remove_entry io_uring/poll.c:166 [inline] io_poll_remove_entries.part.0+0x156/0x7e0 io_uring/poll.c:197 io_poll_remove_entries io_uring/poll.c:177 [inline] io_poll_task_func+0x39e/0xe30 io_uring/poll.c:343 io_handle_tw_list+0x194/0x580 io_uring/io_uring.c:1122 tctx_task_work_run+0x57/0x2b0 io_uring/io_uring.c:1182 tctx_task_work+0x7a/0xd0 io_uring/io_uring.c:1200 task_work_run+0x150/0x240 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x829/0x2a30 kernel/exit.c:971 do_group_exit+0xd5/0x2a0 kernel/exit.c:1112 __do_sys_exit_group kernel/exit.c:1123 [inline] __se_sys_exit_group kernel/exit.c:1121 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1121 x64_sys_call+0x14fd/0x1510 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f60e579aeb9 Code: Unable to access opcode bytes at 0x7f60e579ae8f. RSP: 002b:00007ffc2d47ddf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f60e579aeb9 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000003 R08: 0000000000000000 R09: 00007f60e59e1280 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f60e59e1280 R14: 0000000000000003 R15: 00007ffc2d47deb0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0x14a/0x1d0 lib/list_debug.c:62 Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8d 00 00 00 48 8b 55 00 48 89 e9 48 89 de 48 c7 c7 40 3d fa 8b e8 37 b0 32 fc 90 <0f> 0b 4c 89 e7 e8 3c 24 5d fd 48 89 ea 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc90003bffaa8 EFLAGS: 00010082 RAX: 000000000000006d RBX: ffff88807dc6c3f0 RCX: 0000000000000000 RDX: 000000000000006d RSI: ffffffff81e5d6c9 RDI: fffff5200077ff46 RBP: ffff888146b205c8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000001 R11: 0000000000000000 R12: ffff88807dc6c2b0 R13: ffff88807dc6c408 R14: ffff88807dc6c3f0 R15: ffff88807dc6c3c8 FS: 0000000000000000(0000) GS:ffff8881245d9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f60e56708c0 CR3: 000000006b065000 CR4: 00000000003526f0 --- 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