hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network veth1_vlan: left promiscuous mode veth0_vlan: left promiscuous mode veth0_vlan: entered promiscuous mode veth1_vlan: entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device netdevsim0 ------------[ cut here ]------------ rtmutex deadlock detected WARNING: kernel/locking/rtmutex.c:1698 at rt_mutex_handle_deadlock+0x21/0xb0 kernel/locking/rtmutex.c:1698, CPU#1: syz.0.18875/18438 Modules linked in: CPU: 1 UID: 0 PID: 18438 Comm: syz.0.18875 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:rt_mutex_handle_deadlock+0x21/0xb0 kernel/locking/rtmutex.c:1698 Code: 90 90 90 90 90 90 90 90 90 41 57 41 56 41 55 41 54 53 83 ff dd 0f 85 81 00 00 00 48 89 f7 e8 16 40 01 00 48 8d 3d 0f 4a 69 04 <67> 48 0f b9 3a 4c 8d 3d 00 00 00 00 65 48 8b 1d 33 fd 49 07 4c 8d RSP: 0018:ffffc900170f6330 EFLAGS: 00010286 RAX: 0000000080000000 RBX: 00000000ffffffdd RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8ba92a60 RDI: ffffffff8f8d2cd0 RBP: ffffc900170f64e0 R08: ffffffff8f89c1f7 R09: 1ffffffff1f1383e R10: dffffc0000000000 R11: fffffbfff1f1383f R12: 1ffff92002e1ec74 R13: ffffffff8b23dd02 R14: ffff88802db00ff8 R15: dffffc0000000000 FS: 00007f5f8b67d6c0(0000) GS:ffff888126242000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe6569fdac0 CR3: 0000000069f6a000 CR4: 00000000003526f0 DR0: 0000000000060401 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: __rt_mutex_slowlock kernel/locking/rtmutex.c:1760 [inline] __rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1787 [inline] rt_mutex_slowlock+0x73c/0x780 kernel/locking/rtmutex.c:1827 __rt_mutex_lock kernel/locking/rtmutex.c:1842 [inline] __mutex_lock_common kernel/locking/rtmutex_api.c:560 [inline] mutex_lock_nested+0x168/0x1d0 kernel/locking/rtmutex_api.c:578 netdev_lock include/linux/netdevice.h:2837 [inline] netdev_lock_ops include/net/netdev_lock.h:42 [inline] __ethtool_get_link_ksettings+0x109/0x250 net/ethtool/ioctl.c:463 bond_update_speed_duplex drivers/net/bonding/bond_main.c:801 [inline] bond_slave_netdev_event drivers/net/bonding/bond_main.c:3982 [inline] bond_netdev_event+0x643/0xf80 drivers/net/bonding/bond_main.c:4089 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2288 [inline] call_netdevice_notifiers net/core/dev.c:2302 [inline] __dev_notify_flags+0x1aa/0x310 net/core/dev.c:9793 netif_change_flags+0xde/0x1b0 net/core/dev.c:9822 dev_change_flags+0x128/0x260 net/core/dev_api.c:68 vlan_device_event+0x1b4e/0x1f00 net/8021q/vlan.c:494 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2288 [inline] call_netdevice_notifiers net/core/dev.c:2302 [inline] __dev_notify_flags+0x1aa/0x310 net/core/dev.c:9793 netif_change_flags+0xde/0x1b0 net/core/dev.c:9822 do_setlink+0xdd6/0x4670 net/core/rtnetlink.c:3207 rtnl_group_changelink net/core/rtnetlink.c:3855 [inline] __rtnl_newlink net/core/rtnetlink.c:4023 [inline] rtnl_newlink+0x148e/0x1bd0 net/core/rtnetlink.c:4151 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7068 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7f5/0x990 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:775 __sock_sendmsg net/socket.c:790 [inline] ____sys_sendmsg+0x565/0x870 net/socket.c:2684 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2738 __sys_sendmsg net/socket.c:2770 [inline] __do_sys_sendmsg net/socket.c:2775 [inline] __se_sys_sendmsg net/socket.c:2773 [inline] __x64_sys_sendmsg+0x1b7/0x290 net/socket.c:2773 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5f8d44ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5f8b67d028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f5f8d6c6090 RCX: 00007f5f8d44ce59 RDX: 0000000004000000 RSI: 0000200000000200 RDI: 0000000000000005 RBP: 00007f5f8d4e2e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5f8d6c6128 R14: 00007f5f8d6c6090 R15: 00007ffc39681448 ---------------- Code disassembly (best guess): 0: 90 nop 1: 90 nop 2: 90 nop 3: 90 nop 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 41 57 push %r15 b: 41 56 push %r14 d: 41 55 push %r13 f: 41 54 push %r12 11: 53 push %rbx 12: 83 ff dd cmp $0xffffffdd,%edi 15: 0f 85 81 00 00 00 jne 0x9c 1b: 48 89 f7 mov %rsi,%rdi 1e: e8 16 40 01 00 call 0x14039 23: 48 8d 3d 0f 4a 69 04 lea 0x4694a0f(%rip),%rdi # 0x4694a39 * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 4c 8d 3d 00 00 00 00 lea 0x0(%rip),%r15 # 0x36 36: 65 48 8b 1d 33 fd 49 mov %gs:0x749fd33(%rip),%rbx # 0x749fd71 3d: 07 3e: 4c rex.WR 3f: 8d .byte 0x8d