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AJvYcCWZJN0HlzAAIFh9cWsHx0ggef6Qifvgj38Nvj+lbSbPrlrY0Y6Kw0r9syQ/sDneDfKULkBRks4=@vger.kernel.org X-Gm-Message-State: AOJu0YwQ1D6csEAhd/EOUun/jevu9JciTAB5VQyGdL2yHqMBjdmtTRqD KKSqHrXB8veseErTIXzgmw6mD8UMZz9Xlsn5E3lVVkiro3OxlHAPC0NTa5z0h5u/pP2N/gTo59g hr2TTY9SyBNL2ZXyuRxnra8BpZUhY5utzaJMAFWim8j9ucuXat8VIQR7C6KY= X-Google-Smtp-Source: AGHT+IH41fXInBQhUVFmEC3BYpBSmFe7XYx0t5+7O+tY1xbSuO+MoSFA7uJ2u4Qx5gs1goSDakuSQ0X0NWold4XDloeyf2ZNnLbF Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:3f0b:b0:85b:3c49:8811 with SMTP id ca18e2360f4ac-879c0842721mr125977339f.4.1752612930955; Tue, 15 Jul 2025 13:55:30 -0700 (PDT) Date: Tue, 15 Jul 2025 13:55:30 -0700 In-Reply-To: <676d25b2.050a0220.2f3838.0464.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6876c042.a00a0220.3af5df.0009.GAE@google.com> Subject: Re: [syzbot] [net?] INFO: task hung in inet_rtm_newaddr From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, horms@kernel.org, jhs@mojatatu.com, jiri@resnulli.us, kadlec@netfilter.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pabeni@redhat.com, pablo@netfilter.org, syzkaller-bugs@googlegroups.com, vinicius.gomes@intel.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 0be23810e32e Add linux-next specific files for 20250714 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=17c3e98c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=adc3ea2bfe31343b dashboard link: https://syzkaller.appspot.com/bug?extid=adeb8550754921fece20 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16d1098c580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=116b08f0580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/13b5be5048fe/disk-0be23810.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3d2b3b2ceddf/vmlinux-0be23810.xz kernel image: https://storage.googleapis.com/syzbot-assets/c7e5fbf3efa6/bzImage-0be23810.xz The issue was bisected to: commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 Author: Vinicius Costa Gomes Date: Sat Sep 29 00:59:43 2018 +0000 tc: Add support for configuring the taprio scheduler bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10de9adf980000 final oops: https://syzkaller.appspot.com/x/report.txt?x=12de9adf980000 console output: https://syzkaller.appspot.com/x/log.txt?x=14de9adf980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+adeb8550754921fece20@syzkaller.appspotmail.com Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler") INFO: task syz-executor:6015 blocked for more than 143 seconds. Not tainted 6.16.0-rc6-next-20250714-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:26920 pid:6015 tgid:6015 ppid:1 task_flags:0x400140 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5314 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6697 __schedule_loop kernel/sched/core.c:6775 [inline] schedule+0x165/0x360 kernel/sched/core.c:6790 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6847 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747 rtnl_net_lock include/linux/rtnetlink.h:130 [inline] inet_rtm_newaddr+0x3b0/0x18b0 net/ipv4/devinet.c:979 --- 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.