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AJvYcCUyDtHND8DUboGFWc2DCr0vpQUVHTYiPfN//Qrr74JUsG3oe2BkZ8CT0XLqRaW3HP7yEEHhvTQ=@vger.kernel.org X-Gm-Message-State: AOJu0YxwVjqH3xSs4dvuUO9VLPONphJHRjvAx/sRcRfGLOmzLyfnWpVi TsYfq85Cf5kkuygWIqip0tRtE3W9rN6k5x2p7i0/DQqxyI43A6m9EHc8HshhROh8JOZWlucc9rB MpTOERyrZIlrzeBFpWk7yvpmjD2Mq9TLquwgESVSgFmxpS/Ua6WxgXiI= X-Google-Smtp-Source: AGHT+IHD9LAcPC3LEF/tGMUuGkQYrgbQILB4qAgmVrRZN7HmVaXNsax6qpqhnf6CeymqTo+nAmXUAO7KnDQgGyQlsclAw4nligEg Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3b07:b0:3d5:8922:77a0 with SMTP id e9e14a558f8ab-3d77c2a8cd3mr7095015ab.18.1744148429834; Tue, 08 Apr 2025 14:40:29 -0700 (PDT) Date: Tue, 08 Apr 2025 14:40:29 -0700 In-Reply-To: <67f4d325.050a0220.396535.0558.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <67f597cd.050a0220.258fea.0003.GAE@google.com> Subject: Re: [syzbot] [net?] WARNING in __linkwatch_sync_dev From: syzbot To: andrew@lunn.ch, davem@davemloft.net, edumazet@google.com, horms@kernel.org, jv@jvosburgh.net, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, sdf@fomichev.me, stfomichev@gmail.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 7702d0130dc0 Add linux-next specific files for 20250408 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=138fa7e4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=91edf513888f57d7 dashboard link: https://syzkaller.appspot.com/bug?extid=48c14f61594bdfadb086 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11520398580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16b1323f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/0603dd3556b9/disk-7702d013.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d384baaee881/vmlinux-7702d013.xz kernel image: https://storage.googleapis.com/syzbot-assets/1ac172735b6c/bzImage-7702d013.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+48c14f61594bdfadb086@syzkaller.appspotmail.com ------------[ cut here ]------------ RTNL: assertion failed at ./include/net/netdev_lock.h (56) WARNING: CPU: 1 PID: 12 at ./include/net/netdev_lock.h:56 netdev_ops_assert_locked include/net/netdev_lock.h:56 [inline] WARNING: CPU: 1 PID: 12 at ./include/net/netdev_lock.h:56 __linkwatch_sync_dev+0x30d/0x360 net/core/link_watch.c:279 Modules linked in: CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.15.0-rc1-next-20250408-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: bond0 bond_mii_monitor RIP: 0010:netdev_ops_assert_locked include/net/netdev_lock.h:56 [inline] RIP: 0010:__linkwatch_sync_dev+0x30d/0x360 net/core/link_watch.c:279 Code: 7c fe ff ff e8 f4 63 cc f7 c6 05 83 28 53 06 01 90 48 c7 c7 60 5c 51 8d 48 c7 c6 8a 9b 67 8e ba 38 00 00 00 e8 04 6b 8b f7 90 <0f> 0b 90 90 e9 4d fe ff ff 89 d9 80 e1 07 38 c1 0f 8c 19 fd ff ff RSP: 0018:ffffc90000117710 EFLAGS: 00010246 RAX: 6875daac7c816500 RBX: 0000000000000000 RCX: ffff88801c685a00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff81824ed2 R09: fffffbfff1d7a700 R10: dffffc0000000000 R11: fffffbfff1d7a700 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff888034096008 R15: ffff888034096000 FS: 0000000000000000(0000) GS:ffff888125089000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa9d1a29440 CR3: 0000000075fc0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ethtool_op_get_link+0x15/0x60 net/ethtool/ioctl.c:63 bond_check_dev_link+0x1fb/0x4b0 drivers/net/bonding/bond_main.c:864 bond_miimon_inspect drivers/net/bonding/bond_main.c:2734 [inline] bond_mii_monitor+0x49d/0x3170 drivers/net/bonding/bond_main.c:2956 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319 worker_thread+0x870/0xd50 kernel/workqueue.c:3400 kthread+0x7b7/0x940 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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.