From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f205.google.com (mail-oi1-f205.google.com [209.85.167.205]) (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 37F1C231842 for ; Sat, 20 Jun 2026 03:59:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781927965; cv=none; b=PRAxw3T/HoVDw4evmBlU0te2ejWd7C7PvLA5F2cT8S8NejOdfA2TWX1c1Hb9u2sc92YUgoKoxT4Ujt0cF/Ig1aFhcBzbKeyqN/3QbYrm3p44gvCJ9wHMV5Ijwmd89Kkz1xrrHEo6fsr7ymaxAZJYjXMn9n/7/z1nOr22qK08dlA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781927965; c=relaxed/simple; bh=zjbTYABBQCq4MV195LvlToSF2Y8xv4Wp7WS3HzDItJE=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=mXbso/KaNEkQak+azlDTUHaqQV1/iR574olcu5rinOc4pKtzkjuAFGi+a+qXV7E3gehp32bt0gAACg3Rm+Lt0VG1m4spjeSvreYLNRwao0ZGYYjpQpO54JqlhrhTkX4g09qBhi3uIiqdm8I8z3iVw/9N6nJzuVtN401esvjDVD0= 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=209.85.167.205 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-f205.google.com with SMTP id 5614622812f47-48976713b46so1967447b6e.0 for ; Fri, 19 Jun 2026 20:59:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781927963; x=1782532763; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=hBIEmhr57CNARluLSmTu1YJVZdcg6Ib83HB4fCchvfY=; b=iA70pklj2cpKHIUHoxwUm81KWZ8WUz5ze4LOSQVXDbBuBS0sAEFgm/bJZXDgKrSs4S BI/IU9gIhalc6MTOnDTMBuL1ZY03MGYvpzscsa/VQDkZ6B3q7O4cbA+yUyC8E7skc329 ORWtFqxJezRTHR+6eYn5gFkwXfSfusqaVPrao2a6MDqMw/iVIWXSeVT0G4qtRqN4W8Am INVFkqm7O8pl2rjtE1tmdXFdw9NVTLOU96D+jsNNLJZvRDxpy/esdfktErxNkBmfDuEX +OVj5kfeMCRL4pyWSXvtHSh3pfLd5jSm3nSm/r8ZkXnpjbH6IKT7FA0Wp5CVP5SNoDXp vFUA== X-Forwarded-Encrypted: i=1; AFNElJ+yEUW7PLrSTtR5Yf1AgaiM/R4NlxNMP1XoAdiLEjB82YEP2fHTaQGkCsQxSNxOghXsufsCchua8w==@vger.kernel.org X-Gm-Message-State: AOJu0YyQS6aJvmNWj9yBuqWUv+RT/RcXxn/Uh43oWHalcWKSGO15qhLy FXRALdquGNKhupl32jCLM30VkHKsomnVMhq9TpwaQAUypdmUxukylASAOPVBUpq+IH+fJxTIN76 KZZwkpakD4RQaAf9RIaS1tQ1Woy8rxYznRkpnzDSfKeSThV6LTEmdJ3mdAeA= Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1491:b0:479:ac7d:6d8a with SMTP id 5614622812f47-4896ac02527mr5769421b6e.24.1781927963296; Fri, 19 Jun 2026 20:59:23 -0700 (PDT) Date: Fri, 19 Jun 2026 20:59:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a36101b.be22b350.2a3e9.0001.GAE@google.com> Subject: [syzbot] [io-uring?] WARNING in io_pin_pages (2) 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: 83f1454877cc Merge tag 'ext4_for_linus-7.2-rc1' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1211daae580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f1fef3a5f0899512 dashboard link: https://syzkaller.appspot.com/bug?extid=f99b00a963915b6b52c6 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=164b12ae580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=165bb986580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/87171ffb708f/disk-83f14548.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/cf1d27787991/vmlinux-83f14548.xz kernel image: https://storage.googleapis.com/syzbot-assets/6e9a56090e11/bzImage-83f14548.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f99b00a963915b6b52c6@syzkaller.appspotmail.com ------------[ cut here ]------------ !(flags & __GFP_NOWARN) WARNING: mm/slub.c:6841 at __kvmalloc_node_noprof+0x6f7/0xa60 mm/slub.c:6841, CPU#1: syz.0.17/5823 Modules linked in: CPU: 1 UID: 0 PID: 5823 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:__kvmalloc_node_noprof+0x6f7/0xa60 mm/slub.c:6841 Code: c1 e8 5d 0f ff ff 4d 85 f6 0f 85 21 fd ff ff 48 81 fb ff ff ff 7f 0f 86 b8 fc ff ff 41 81 e4 00 20 00 00 0f 85 07 fd ff ff 90 <0f> 0b 90 e9 fe fc ff ff be 43 01 00 00 48 c7 c7 22 f2 f1 8d e8 a0 RSP: 0018:ffffc9000249fa88 EFLAGS: 00010246 RAX: 0000000000000001 RBX: 0000000080000008 RCX: 0000000100000000 RDX: 0000000000000000 RSI: ffffffff8c1d1100 RDI: ffffffff8e1e6928 RBP: 000000d6000000ca R08: 00000000004028c0 R09: 00000000ffffffff R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: 00000000ffffffff R14: 0000000000000000 R15: 00000000004028c0 FS: 000055556bd29500(0000) GS:ffff88812442d000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd3d173e44 CR3: 0000000076c8e000 CR4: 00000000003526f0 Call Trace: io_pin_pages+0xc3/0x1e0 io_uring/memmap.c:59 io_sqe_buffer_register+0x1d9/0x1500 io_uring/rsrc.c:884 io_sqe_buffers_register.cold+0x346/0x4c3 io_uring/rsrc.c:995 __io_uring_register io_uring/register.c:767 [inline] __do_sys_io_uring_register+0x13ce/0x1bc0 io_uring/register.c:1029 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcd6539ce59 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:00007ffc5b4af188 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab RAX: ffffffffffffffda RBX: 00007fcd65615fa0 RCX: 00007fcd6539ce59 RDX: 0000200000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: 00007fcd65432e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcd65615fac R14: 00007fcd65615fa0 R15: 00007fcd65615fa0 --- 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