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 60DE53FD1 for ; Thu, 8 May 2025 01:23:46 +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=1746667428; cv=none; b=YMLqbfzhGabDo8rXAxtY1c72FHA55p9cZd4E9uruvdJuseJxa9V7/tYuwQ/PsxyYHWfVEZ0IJ41bXUygfaBG6SeGeMt5UoJjMLgjLBgDJVQGBZy3QjzBhno6OQM3pM7wSMbEIo7OSLD38ddc2JPKAohjSRYtwzWZCkJsYektxyk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746667428; c=relaxed/simple; bh=0wiN+b01chfenhkxqa6KglcTyGN4fkzpt+a/MaFBwoI=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=o/hl7BNoUs+M2OGy0ZUG9Wm8f5zctNGMoIWHVPX42wXdmT5aJpzVOjBoOdN2OZsqNw7YKCTQEyaFkwyf1uRdF8QzYPBFkZS3/yLIJFNvtZhnhuxzJ0I5w7Z75F7r+9aAjlOgLrlEGTmUoRTANgt2/RsLVBfNZfejPKoqilDt0RM= 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-3da644c8ffeso5438185ab.1 for ; Wed, 07 May 2025 18:23:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746667425; x=1747272225; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=cn8+n2YqlG5ZBXqPKVrPe58LSo1TU9Oq9C5LLD1Jamg=; b=JhV63LC2kYX9PkhYNpjjnAfdEtbRw/D0v7RkEfSGHUZDvZ/YINgRpWFP7fJHc4iI6r nA2zLs91ZvV3W83W3K+8xf3Qe+ADB6W2pIdK9cYeVmHEQRiAgYt4rndRuhe9HPIl7yLZ LuvqqqGINUY6O4BxiVutPeZUR1jAJngk/nmeVcvWXiWbpVMSkdZ9tcbfmEqf4HaIVNlI d5MiOgSSKSP2S2S5VdZVF0oikIi1DF6juD2Oq3wPj4g3Hz7TrfEzyybQ3Yp8hJ6AVbi7 ATsL0Ryc11WqkZwlsYdc+cIyBXSlRAjEZnD3ws9eLFZQLjv2OHGGI1zoN1xtJbJ9hwMs XRHw== X-Forwarded-Encrypted: i=1; AJvYcCVZA0oFD1s1rSulZ8sWotqzo0P/4FKUqtvGGyg8Z1K4+gp7ZTHYXQtcxU0mNfK+BRM12R4LUSDxwo68tkQ=@vger.kernel.org X-Gm-Message-State: AOJu0Yw/1eT/pg939CD79nztsv8RlIHoZcJkRym8oZVk6BwB3T9q6sYf SF63Wjo2hhpZStDvb8A/dQ1N+5NUj333zf74a2vfqvt4+eZ1DMgO94YzH2YXZznilQnIBdApvhP IUtv+lOrSK3fOBzMZAlLr2eMjyQCGH2fY1aHeh2G3SHbA7VWQXcgOPBo= X-Google-Smtp-Source: AGHT+IEmNr9VhBMrKMt6vjigLUzXWMdwhbB11J/yL4hhgUZepHx4nXVAD/95nrtEsEo5svIIo2WpKIrPXBsjLu5oqgwVCMBJToZl Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:194b:b0:3d8:20fb:f060 with SMTP id e9e14a558f8ab-3da738ed7c6mr64668425ab.4.1746667425480; Wed, 07 May 2025 18:23:45 -0700 (PDT) Date: Wed, 07 May 2025 18:23:45 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <681c07a1.050a0220.a19a9.007c.GAE@google.com> Subject: [syzbot] [net?] general protection fault in mld_clear_delrec From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 92a09c47464d Linux 6.15-rc5 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15b23b68580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b39cb28b0a399ed3 dashboard link: https://syzkaller.appspot.com/bug?extid=888c7330963d4b45da35 compiler: gcc (Debian 12.2.0-14) 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: https://storage.googleapis.com/syzbot-assets/bb9b7be3962f/disk-92a09c47.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d4048c02a409/vmlinux-92a09c47.xz kernel image: https://storage.googleapis.com/syzbot-assets/f1a81e88c04e/bzImage-92a09c47.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+888c7330963d4b45da35@syzkaller.appspotmail.com veth1_vlan: left promiscuous mode veth0_vlan: left promiscuous mode team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed Oops: general protection fault, probably for non-canonical address 0xdffffc001ffee000: 0000 [#1] SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x00000000fff70000-0x00000000fff70007] CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted 6.15.0-rc5-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025 Workqueue: netns cleanup_net RIP: 0010:mld_clear_delrec+0x2a6/0x640 net/ipv6/mcast.c:838 Code: 20 00 0f 85 91 03 00 00 49 8b 5d 28 49 c7 45 28 00 00 00 00 48 85 db 75 37 e9 d4 00 00 00 e8 21 86 96 f7 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 39 03 00 00 48 8b 2b 48 8d 7b 30 48 89 de e8 RSP: 0018:ffffc900001275f8 EFLAGS: 00010206 RAX: 000000001ffee000 RBX: 00000000fff70000 RCX: ffffffff8a24ad36 RDX: ffff88801ca80000 RSI: ffffffff8a24accf RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888033bf3c00 R14: ffff88805babf000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881249df000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f87f8f59348 CR3: 000000000e180000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ipv6_mc_destroy_dev+0x49/0x690 net/ipv6/mcast.c:2842 addrconf_ifdown.isra.0+0x13ef/0x1a90 net/ipv6/addrconf.c:3997 addrconf_notify+0x220/0x19e0 net/ipv6/addrconf.c:3777 notifier_call_chain+0xb9/0x410 kernel/notifier.c:85 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2176 call_netdevice_notifiers_extack net/core/dev.c:2214 [inline] call_netdevice_notifiers net/core/dev.c:2228 [inline] unregister_netdevice_many_notify+0xf9a/0x26f0 net/core/dev.c:11982 unregister_netdevice_many net/core/dev.c:12046 [inline] default_device_exit_batch+0x853/0xaf0 net/core/dev.c:12538 ops_exit_list+0x128/0x180 net/core/net_namespace.c:177 cleanup_net+0x5c1/0xb30 net/core/net_namespace.c:654 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c2/0x780 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mld_clear_delrec+0x2a6/0x640 net/ipv6/mcast.c:838 Code: 20 00 0f 85 91 03 00 00 49 8b 5d 28 49 c7 45 28 00 00 00 00 48 85 db 75 37 e9 d4 00 00 00 e8 21 86 96 f7 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 39 03 00 00 48 8b 2b 48 8d 7b 30 48 89 de e8 RSP: 0018:ffffc900001275f8 EFLAGS: 00010206 RAX: 000000001ffee000 RBX: 00000000fff70000 RCX: ffffffff8a24ad36 RDX: ffff88801ca80000 RSI: ffffffff8a24accf RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888033bf3c00 R14: ffff88805babf000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888124adf000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe3317d4800 CR3: 000000000e180000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 20 00 and %al,(%rax) 2: 0f 85 91 03 00 00 jne 0x399 8: 49 8b 5d 28 mov 0x28(%r13),%rbx c: 49 c7 45 28 00 00 00 movq $0x0,0x28(%r13) 13: 00 14: 48 85 db test %rbx,%rbx 17: 75 37 jne 0x50 19: e9 d4 00 00 00 jmp 0xf2 1e: e8 21 86 96 f7 call 0xf7968644 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 0f 85 39 03 00 00 jne 0x36e 35: 48 8b 2b mov (%rbx),%rbp 38: 48 8d 7b 30 lea 0x30(%rbx),%rdi 3c: 48 89 de mov %rbx,%rsi 3f: e8 .byte 0xe8 --- 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