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 DD70E262D1D for ; Tue, 6 May 2025 14:06:40 +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=1746540402; cv=none; b=WCk1t+RJ1V9B1VnF5SWn8E1jVy8asQllOWfLXOs6b9Pl1yvZECORIBGrPruFdyqqHtYEn9DgFFCeHoUi3LEU5SpmB3pumMf2JsocuHOyoPHFKzlC6XdtNGejgUHfR5MvXZCWm+KnJGZP2h6Ist/ZxJENCuII6FZ/h6JEk9D1ra4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746540402; c=relaxed/simple; bh=bv0HVRCix0niu2IxUzJdkDMcsBHYP7kgZZ1LxLAv67w=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=bZ187h8KUsJ44MWmjVG0B+DjMCLo9BYQRd+S8NDrYhru1E48L3lDUQ+lLgETm7EXd6sSo/tI8J4LYUakRmksfJGZM5F1xd/oY3C8WSfGwAXwhsx39sjOL8CoopyXHLC2H/BGwtTYtK5adORtTXMTYnbVbYVzpBSfiSTaykks/3c= 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-3da720ff4a0so618575ab.3 for ; Tue, 06 May 2025 07:06:40 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1746540400; x=1747145200; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=Szl6w1gWdmmSf2FjvrqVayNusKTVuHe3uUlO8IkO8EA=; b=wNzthqNZA1AV2by2IL28Ki2mZ49hoIjgp1WvPqgcN375qsRd5y7swAJT9bB8cFVH4c N/Zlv2fWSGrJmCSKF8CWl6jkLs62aq5CIFsN+DJn8nGEbAys/xvwkr1PeB73Deyj+cOZ qchnjob0FRikSuw0+NW13WbunhVS2e4abzAlzMIYsiQiZ1OuxVJzuRHtW8mgPk06ToVH nqxfGW30pM0h6HR3XNjbo5ughSogPAaXx09OSC5eO77ztYy9adn1/EEJfcnd68OvqEA/ NA+G8+jPQvfdoDCW8gFkra7QqaefMbCcv+cuIjsj9VsOEzuR6z5nU30nj005jQLfRACt msLg== X-Forwarded-Encrypted: i=1; AJvYcCXirE2+HOmhY+TBl2BM7LFehqJYcWoKo9hQvVEux9fCiEAEYJufTzMV2PMB0QiHbMxNHjyxxrc=@vger.kernel.org X-Gm-Message-State: AOJu0YxmCRuiFw69aAdJzu3nLWUsh6wYAqDPqviOv2Fw7FMt2tx32R+i naj7GCTrX3q+4Vd0ENRK4RbEXcmIyqX5xH3SIHdpLGOzS4X1le0est2wQpZQMEVhIPSMqXVwiu3 LKXf7MWozvHTSs2KPSPksVLRWm2qXILkM/VVtwTbR9DNjoKmjWerdCm8= X-Google-Smtp-Source: AGHT+IGspIrZv6C+Lbf+tFwTXKQYE44l8MuohkH0H68fEeVMBrlmKRrEQpEU7BNp5fyidqWtolP7xt7Voo8KcPyR87fAs1xX58Y1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:2283:b0:3d8:20f0:4026 with SMTP id e9e14a558f8ab-3da5b23c4bbmr110510875ab.1.1746540399979; Tue, 06 May 2025 07:06:39 -0700 (PDT) Date: Tue, 06 May 2025 07:06:39 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <681a176f.050a0220.a19a9.000c.GAE@google.com> Subject: [syzbot] [net?] INFO: task hung in inet6_rtm_newaddr (2) 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: 01f95500a162 Merge tag 'uml-for-linux-6.15-rc6' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13c0b0f4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=91c351a0f6229e67 dashboard link: https://syzkaller.appspot.com/bug?extid=101224300649c3eb8af4 compiler: Debian clang version 20.1.2 (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1223bb68580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-01f95500.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/db1628150472/vmlinux-01f95500.xz kernel image: https://storage.googleapis.com/syzbot-assets/ecd327744f2e/bzImage-01f95500.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+101224300649c3eb8af4@syzkaller.appspotmail.com INFO: task syz-executor:5435 blocked for more than 143 seconds. Not tainted 6.15.0-rc5-syzkaller-00022-g01f95500a162 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:22056 pid:5435 tgid:5435 ppid:1 task_flags:0x400140 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x16e2/0x4cd0 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0x165/0x360 kernel/sched/core.c:6860 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6917 __mutex_lock_common kernel/locking/mutex.c:678 [inline] __mutex_lock+0x724/0xe80 kernel/locking/mutex.c:746 rtnl_net_lock include/linux/rtnetlink.h:130 [inline] inet6_rtm_newaddr+0x5b7/0xd20 net/ipv6/addrconf.c:5028 rtnetlink_rcv_msg+0x7cc/0xb70 net/core/rtnetlink.c:6955 netlink_rcv_skb+0x219/0x490 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x758/0x8d0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:727 __sys_sendto+0x3bd/0x520 net/socket.c:2180 __do_sys_sendto net/socket.c:2187 [inline] __se_sys_sendto net/socket.c:2183 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2183 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff7979907fc RSP: 002b:00007ffd90db52d0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007ff7986e4620 RCX: 00007ff7979907fc RDX: 0000000000000040 RSI: 00007ff7986e4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffd90db5324 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007ff7986e4670 R15: 0000000000000000 INFO: task syz-executor:5442 blocked for more than 152 seconds. Not tainted 6.15.0-rc5-syzkaller-00022-g01f95500a162 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:21848 pid:5442 tgid:5442 ppid:1 task_flags:0x400140 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0x16e2/0x4cd0 kernel/sched/core.c:6767 --- 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