From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f207.google.com (mail-il1-f207.google.com [209.85.166.207]) (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 C7FEBA41 for ; Sat, 8 Nov 2025 10:47:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762598848; cv=none; b=t96OfCQovnjticKILhL/zdfr5u5sdu44VxPNfExGLD/gWj4PU3p/Mv2so4RpgrOhMUX2CBaFgoJmgGdfbZmlbh9cNRFF9/LbyZ7MoSu6eDVfuFm+uSMDTSYo+6HWBsxjEsOXD3h9yDls6rKPphHWN4oCjxpqW1UAKda/8hpzEyE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762598848; c=relaxed/simple; bh=nfAyGD8aJ1z6s06mDiRAlmDN0OmCWTp9N9Cb/rttEJw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=EWWFhxYQ3EFQ43TkPB5DRy4Kjbv7sn34v8OTtnqPuUe5tx+2S9/TeZSx4FLIxmN+gVOC5g4Ai8Q5qZWt6LuxKlqqHhNuzWQolqy9K1crkfPD5tz3Jq5dg9clnGCzyvYn05cst5QOarGSLOnQ8nb5nCxSYwrogEGwOpcOECi3anY= 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=209.85.166.207 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-il1-f207.google.com with SMTP id e9e14a558f8ab-43327c30cb1so14331765ab.2 for ; Sat, 08 Nov 2025 02:47:26 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762598846; x=1763203646; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=ru9blyctQS2YXBRkFgASHgL8mYMoiGtLH+vMKDPKhdw=; b=siDrfbuJqjnidfLhFXey9HbIJWrBze61f9WmATkIJo075o1UZoQ9SiO2Bu8JAuWIMr 5ndPvXQEk+5iYCnT2iYSN8iDAlidMaWdwMHG2ZHunAXKBXoUQnV9astyccxa2yhwN0XI HfrKULLZhZKeQQRH+nDFT14ZMRZlu5ULu7+LNLiBBYldFoai7U4V6/Hm/JAd06E3C2Ut fZ5FVf5hbiIrBDsH7gLQ6ukf5hEQXf4gWU4GocmwE2kzYn7+tKDifmyyKSkfgYKtYSfr 2DsFEapMmfFqOZh8wyjLMrsSj2RDfMExlAh/WdMxO68bLGtNza6caSvKQwzm5yit0jUY tnLg== X-Gm-Message-State: AOJu0Yz6Gmr/pz+5jKzkxUc6xSlUsVdMKgkcn+VTl91u7l7vw7HSZlkg ogP9IhUdb+lkZjKOOS7JnjTgHaIQbqmikUWNikSfEjj6+uYoQ4eu7ns7B8XeiR6GTBKjmM9izSM qzRUucvUZTIn7MfNTp72MNZhFvDjaUnI2BwLcmu+kdb9W8gngf9y3fS9AkfPjMw== X-Google-Smtp-Source: AGHT+IFvhCyfDgJ4JZt8w8MpJnaHvgqU50hgHhtfzu3dcXoBDUE5pziqZORRbMStkGZWX9tyfsnxYqprp7ZTOHt9Zzsx38yhB37k Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:219d:b0:433:2b83:340b with SMTP id e9e14a558f8ab-43367ddc25dmr32147515ab.2.1762598845921; Sat, 08 Nov 2025 02:47:25 -0800 (PST) Date: Sat, 08 Nov 2025 02:47:25 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <690f1fbd.a70a0220.22f260.007c.GAE@google.com> Subject: [syzbot] [kernel?] WARNING in free_nsproxy From: syzbot To: linux-kernel@vger.kernel.org, luto@kernel.org, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 9c0826a5d9aa Add linux-next specific files for 20251107 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=13e5117c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4f8fcc6438a785e7 dashboard link: https://syzkaller.appspot.com/bug?extid=18ca16805765b88f983b compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6b76dc0ec17f/disk-9c0826a5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/522b6d2a1d1d/vmlinux-9c0826a5.xz kernel image: https://storage.googleapis.com/syzbot-assets/4a58225d70f3/bzImage-9c0826a5.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+18ca16805765b88f983b@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: ./include/linux/ns_common.h:255 at __ns_ref_put include/linux/ns_common.h:255 [inline], CPU#0: syz.0.1748/11884 WARNING: ./include/linux/ns_common.h:255 at put_uts_ns include/linux/uts_namespace.h:37 [inline], CPU#0: syz.0.1748/11884 WARNING: ./include/linux/ns_common.h:255 at free_nsproxy+0x415/0x560 kernel/nsproxy.c:193, CPU#0: syz.0.1748/11884 Modules linked in: CPU: 0 UID: 0 PID: 11884 Comm: syz.0.1748 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:__ns_ref_put include/linux/ns_common.h:255 [inline] RIP: 0010:put_uts_ns include/linux/uts_namespace.h:37 [inline] RIP: 0010:free_nsproxy+0x415/0x560 kernel/nsproxy.c:193 Code: 85 ed 0f 8e be 00 00 00 e8 48 4d 33 00 48 8b 3d 71 71 32 11 48 89 de 5b 41 5c 41 5e 41 5f 5d e9 01 77 8e 00 e8 2c 4d 33 00 90 <0f> 0b 90 e9 ba fc ff ff e8 1e 4d 33 00 4c 89 ff be 03 00 00 00 e8 RSP: 0018:ffffc9000aae7a90 EFLAGS: 00010293 RAX: ffffffff818e8304 RBX: ffff88801d29b7b8 RCX: ffff888058b19e80 RDX: 0000000000000000 RSI: 00000000fffffffe RDI: 0000000000000000 RBP: 00000000fffffffe R08: ffff88807ee2852b R09: 1ffff1100fdc50a5 R10: dffffc0000000000 R11: ffffed100fdc50a6 R12: dffffc0000000000 R13: 0000000000000009 R14: ffff88807ee282d8 R15: ffff88807ee28528 FS: 0000000000000000(0000) GS:ffff888125a79000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0bce3c3df0 CR3: 0000000079622000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000000000000c DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: do_exit+0x6b8/0x2300 kernel/exit.c:969 do_group_exit+0x21c/0x2d0 kernel/exit.c:1111 get_signal+0x1285/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline] exit_to_user_mode_loop+0x87/0x4f0 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x2e9/0xfa0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe49bbc1f85 Code: Unable to access opcode bytes at 0x7fe49bbc1f5b. RSP: 002b:00007fe49c9eef80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: fffffffffffffdfc RBX: 00007fe49bde5fa0 RCX: 00007fe49bbc1f85 RDX: 00007fe49c9eefc0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fe49bc11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007fe49bde6038 R14: 00007fe49bde5fa0 R15: 00007ffc4ce98bc8 --- 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. 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