From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f205.google.com (mail-il1-f205.google.com [209.85.166.205]) (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 B96031FF1B5 for ; Sun, 9 Nov 2025 10:15:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.205 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762683336; cv=none; b=pOhrPZ307yZXdwZhnFS4K/3kUnIlMLkGquSQrjbeSDnS91XJL2i+U1CSgSriW4XShGKKdcXfhJkXyJG1s2ejkakINc/XBEUwWrnyiuAhjFMwr1pyYL3fGh1vqVMBZukDXD4g3pRMCHelb691327K4pCkVWOgLhYyeaHe/H94bw8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762683336; c=relaxed/simple; bh=JoJpjaNCesMsEk/LnuAxI9vwz7fODrhFaOeqt+A+B1g=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=jnyiABNYW2ohbVCeX8jixDZMi6xgGhzMqYmtsUk078IU4QXXe+nvAMQ8S3cWxVQxm7VFadgOCagJv4JSAB6rpMMFUfEIjHoPxGg4m4UIHmA8N4yRFUKiqgxRXWcqgQ++USi5U8bxjbt1bnlGQBvPxsewWbzVlHVG/VomnVZsL1o= 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=209.85.166.205 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-il1-f205.google.com with SMTP id e9e14a558f8ab-432f8352633so61910855ab.0 for ; Sun, 09 Nov 2025 02:15:34 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762683334; x=1763288134; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=2TusO6l7rENag8kyO6sxtwjm6OOmX9LukE12Q6Ye/4I=; b=kaexcr7Gm+yySedDJM8EkboC4W1ExBQg9qvqI4aP7L0pAiVREmZcJMAwEnxXgSKcIq 9v7QbMRqqeyM6q4xza+NopgAIzmQapZFMcc4sW6z7bEmpB+eIYbqQfgkQ614tPI1BRLd CzrWTLOleB2Y3+M0xIGEOWoAGtidiTkJsKDMOWDlOVpocFaUynszuNykrOJawSy3Uaf/ 2AOlXNNjDLgwlEq1d8sTAqBCiyfmZZ++d4nS6yzK5UbYRXzLwJFoNNzAiKdQoVrDw1Ay JE4vOgeNbK2IA2mYQ4npbawZ8gMX294FsF2LAq/OnHkFaIiLoPNVZJiEPm7v/V7E1VGK eGRw== X-Gm-Message-State: AOJu0YwoWHbHykxkSYElVon0aOQC+6+dXDz4Sh4LXqXqkv9Wy9TuXCi3 gx9htZmhEY75OypZ//U7ZncOPXthShbxSahRVUm5eDkNYf8Q8Pjm9Z/iT9NrNaX8C/Z0KV8cYyK k1V19AMikQWUZcAoV3pp2H3eZahRh/7RsJsPjK63WOh8JnHYJ1V0VHQRqx5cIgQ== X-Google-Smtp-Source: AGHT+IHx6FDK+IL+nlPayW1BJNFMc3mn7GbmR7tl/F+f15FEcbUwVtRr1bXUvSuNzKwZTvAneuK9Kx50U8W1UNOf3GJHOk5uRFH0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:250d:b0:433:7a2f:a410 with SMTP id e9e14a558f8ab-4337a2fa653mr19307215ab.23.1762683333938; Sun, 09 Nov 2025 02:15:33 -0800 (PST) Date: Sun, 09 Nov 2025 02:15:33 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <691069c5.a70a0220.22f260.00ab.GAE@google.com> Subject: [syzbot] [kernel?] WARNING in put_pid_ns 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=112b2a92580000 kernel config: https://syzkaller.appspot.com/x/.config?x=4f8fcc6438a785e7 dashboard link: https://syzkaller.appspot.com/bug?extid=513ead8ebc465c343285 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+513ead8ebc465c343285@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: ./include/linux/ns_common.h:255 at __ns_ref_put include/linux/ns_common.h:255 [inline], CPU#1: syz.3.216/6577 WARNING: ./include/linux/ns_common.h:255 at put_pid_ns+0x113/0x150 kernel/pid_namespace.c:187, CPU#1: syz.3.216/6577 Modules linked in: CPU: 1 UID: 60929 PID: 6577 Comm: syz.3.216 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_pid_ns+0x113/0x150 kernel/pid_namespace.c:187 Code: ab cc ff bf 01 00 00 00 89 ee e8 58 b9 03 00 85 ed 7e 1c e8 0f b5 03 00 5b 41 5e 41 5f 5d c3 cc cc cc cc cc e8 fe b4 03 00 90 <0f> 0b 90 eb 95 e8 f3 b4 03 00 4c 89 f7 be 03 00 00 00 5b 41 5e 41 RSP: 0018:ffffc900179e7a68 EFLAGS: 00010293 RAX: ffffffff81be1b32 RBX: ffff888075ae0810 RCX: ffff88802f758000 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000 RBP: 00000000ffffffff R08: ffff888075ae097b R09: 1ffff1100eb5c12f R10: dffffc0000000000 R11: ffffed100eb5c130 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff888075ae0978 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125b79000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3ee428 CR3: 0000000075a66000 CR4: 00000000003526f0 Call Trace: free_nsproxy+0x13a/0x560 kernel/nsproxy.c:195 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: 0033:0x7f224db8f6c9 Code: Unable to access opcode bytes at 0x7f224db8f69f. RSP: 002b:00007f224e9e90e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f224dde5fa8 RCX: 00007f224db8f6c9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f224dde5fa8 RBP: 00007f224dde5fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f224dde6038 R14: 00007ffdda9ff3c0 R15: 00007ffdda9ff4a8 --- 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