From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f78.google.com (mail-oo1-f78.google.com [209.85.161.78]) (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 F3AFF1EFF93 for ; Tue, 20 Jan 2026 01:13:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768871612; cv=none; b=PUvfcIKz9IDym4oG6YbgW8UqcbzZpfp0/mKTQvgnn8mr6xqMNYnTYPz2uUjB4/0zFdzj6X9sgMGkXb5S7rC6AJ3X9Lp9Ig1jxFrpbqsAmjKue/uooYB7JMlVa+S7rxqlS/GQWBqzO/k57PSfiL49gPZjdIBXqm7h6TUCGv/6DbQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768871612; c=relaxed/simple; bh=Y14vDKD49LDciXUVtCE3b0WBpRwLTNiS7LhbkI/TzaA=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=I22/Lk2oEYIUed9/mnQX6dB9FfUKJB5SabswDd5nceHKr0LvX64HqiAwD+/2CSodYiuHx3/3s9lFQhhnNJPkTaRwnceOIlrW0KtimF/W9zDvKpzhnxT+SvnJpLekQqBX/0Vbnv6heO2jDNJ+pJa7/Tir//OM8M0gAtF6EAo3FQM= 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=209.85.161.78 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-f78.google.com with SMTP id 006d021491bc7-65f7130d6aeso11737537eaf.0 for ; Mon, 19 Jan 2026 17:13:30 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768871610; x=1769476410; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=iMZ0SB80UsvlLl0TAHlXKp/7xzXwkZovkGIyQE9iOYo=; b=mMntvFekOU+dP9bgNhYzT2pdnBopE9di91I8xnIbJQq5/mFBJmc+EzjuMvowLyrxW0 NV9llaifevX6FexziquwPjVikIvVqBSpFYWHzfOEn7WhlxpDEenofggyPM/MiU5mnTTy d1bIMnmo1/8cgQYRNgOOvYwR4UZGEIVGo00rck5vEH1mFyqJIC4MXcRh0aKkQQz2t9WN osDP3QT31J75GL9HELKQ7JhI7l/g0n7njMbQrrGKLtozuXCuH5YV0yAJGM/taRaayk1b tklf/Dl4j6Dan3YBR7ZepSCMVvIuBQV/Pq+8gi4J6rG9xuaWab96DePYbCNAF5k8eDzy Ll1A== X-Forwarded-Encrypted: i=1; AJvYcCWX+nkSdE7f4TRMH9lPiS2imO/6Sb09ssNIOCs/JZ4xgAZQ7mLrofGCx0uF4PluIVZhM6HWeBuFRKZUr9o=@vger.kernel.org X-Gm-Message-State: AOJu0YxUmQnd+eh9TCBrntotqkOpTWU/F+3do9mwhRCxYpFy1pHR7qbd D5V48Wx5otVCquCnJaHAZapdn0A5+PAxSjSNFcxEqJ/Jcw+QuZHT5ujS/2ENJPZs93ZnnGfZT9r 6jUWlYRBXqwl6zywNOaOPwxQG+CnI6Rs3s6jLMkTwAQ+l0nHhl9+W87h4Vjs= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:3081:b0:65f:6794:9e76 with SMTP id 006d021491bc7-66118913f36mr5838273eaf.36.1768871609809; Mon, 19 Jan 2026 17:13:29 -0800 (PST) Date: Mon, 19 Jan 2026 17:13:29 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <696ed6b9.a00a0220.203946.0000.GAE@google.com> Subject: [syzbot] [overlayfs?] WARNING in ovl_create_real (4) From: syzbot To: amir73il@gmail.com, linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org, miklos@szeredi.hu, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 603c05a1639f Merge tag 'nfs-for-6.19-2' of git://git.linux.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17b8339a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1859476832863c41 dashboard link: https://syzkaller.appspot.com/bug?extid=2214f6a425ea963a605b compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-603c05a1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0fd1a1c47d69/vmlinux-603c05a1.xz kernel image: https://storage.googleapis.com/syzbot-assets/152f657b1f0a/bzImage-603c05a1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+2214f6a425ea963a605b@syzkaller.appspotmail.com overlayfs: ...falling back to redirect_dir=nofollow. overlayfs: ...falling back to index=off. overlayfs: ...falling back to uuid=null. ------------[ cut here ]------------ WARNING: fs/overlayfs/dir.c:214 at ovl_create_real+0x9af/0xbd0 fs/overlayfs/dir.c:214, CPU#2: syz.2.9540/3063 Modules linked in: CPU: 2 UID: 0 PID: 3063 Comm: syz.2.9540 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:ovl_create_real+0x9af/0xbd0 fs/overlayfs/dir.c:214 Code: 8b 48 c7 c7 c8 2b 79 90 e8 1e 42 98 01 44 0f b6 3d 41 5a 31 0d e9 dc fa ff ff e8 fc 05 e1 fe e9 67 f8 ff ff e8 12 2a 77 fe 90 <0f> 0b 90 49 c7 c4 fb ff ff ff e9 ac f8 ff ff 49 c7 c4 fe ff ff ff RSP: 0018:ffffc9000518f4b0 EFLAGS: 00010283 RAX: 000000000001eb61 RBX: ffff88802d846758 RCX: ffffc9002830b000 RDX: 0000000000080000 RSI: ffffffff8347d1be RDI: 0000000000000005 RBP: ffff88803bd2f490 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: ffff888033102ff0 R12: 0000000000000000 R13: ffff888034d2a800 R14: ffff88802d8467c0 R15: ffff888035c6e2e0 FS: 00007f0d6ec506c0(0000) GS:ffff8880d6af2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b333dcff8 CR3: 000000005d5af000 CR4: 0000000000352ef0 DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: ovl_create_temp+0x54/0xb0 fs/overlayfs/dir.c:253 ovl_copy_up_workdir fs/overlayfs/copy_up.c:778 [inline] ovl_do_copy_up fs/overlayfs/copy_up.c:988 [inline] ovl_copy_up_one+0xc4e/0x3c40 fs/overlayfs/copy_up.c:1189 ovl_copy_up_flags+0x18f/0x240 fs/overlayfs/copy_up.c:1243 ovl_rename_start fs/overlayfs/dir.c:1161 [inline] ovl_rename+0x270/0x6b0 fs/overlayfs/dir.c:1348 vfs_rename+0x1021/0x2390 fs/namei.c:5938 do_renameat2+0x71c/0x9b0 fs/namei.c:6056 __do_sys_rename fs/namei.c:6099 [inline] __se_sys_rename fs/namei.c:6097 [inline] __x64_sys_rename+0x7d/0xa0 fs/namei.c:6097 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0d6dd8f7c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0d6ec50038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f0d6dfe5fa0 RCX: 00007f0d6dd8f7c9 RDX: 0000000000000000 RSI: 0000200000000180 RDI: 0000200000000000 RBP: 00007f0d6de13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0d6dfe6038 R14: 00007f0d6dfe5fa0 R15: 00007fffee2fe808 --- 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