Warning: Permanently added '10.128.1.12' (ECDSA) to the list of known hosts. syzkaller login: [ 57.714025][ T6928] IPVS: ftp: loaded support on port[0] = 21 [ 57.807469][ T6928] chnl_net:caif_netlink_parms(): no params data found [ 57.858224][ T6928] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.866327][ T6928] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.874067][ T6928] device bridge_slave_0 entered promiscuous mode [ 57.883733][ T6928] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.891317][ T6928] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.900037][ T6928] device bridge_slave_1 entered promiscuous mode [ 57.921323][ T6928] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 57.932202][ T6928] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 57.955950][ T6928] team0: Port device team_slave_0 added [ 57.963304][ T6928] team0: Port device team_slave_1 added [ 57.982242][ T6928] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 57.989292][ T6928] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 58.016116][ T6928] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 58.028849][ T6928] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 58.036520][ T6928] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 58.063047][ T6928] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 58.148994][ T6928] device hsr_slave_0 entered promiscuous mode [ 58.215597][ T6928] device hsr_slave_1 entered promiscuous mode [ 58.345628][ T6928] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 58.398341][ T6928] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 58.448211][ T6928] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 58.518241][ T6928] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 58.592132][ T6928] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.599335][ T6928] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.607248][ T6928] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.614472][ T6928] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.661090][ T6928] 8021q: adding VLAN 0 to HW filter on device bond0 [ 58.674449][ T2508] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 58.684697][ T2508] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.693388][ T2508] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.701859][ T2508] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 58.716662][ T6928] 8021q: adding VLAN 0 to HW filter on device team0 [ 58.727537][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 58.736849][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.743885][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 58.766955][ T2508] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 58.776348][ T2508] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.783401][ T2508] bridge0: port 2(bridge_slave_1) entered forwarding state [ 58.791921][ T2508] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 58.803262][ T2508] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 58.812809][ T2508] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 58.829520][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 58.838125][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 58.847582][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 58.857307][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 58.868748][ T6928] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 58.892584][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 58.900088][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 58.914382][ T6928] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 58.932695][ T2509] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 58.941642][ T2509] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 58.963712][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 58.972397][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 58.983101][ T6928] device veth0_vlan entered promiscuous mode [ 58.990781][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 58.999776][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 59.012933][ T6928] device veth1_vlan entered promiscuous mode [ 59.034247][ T2509] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 59.042776][ T2509] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 59.051621][ T2509] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 59.060404][ T2509] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 59.071117][ T6928] device veth0_macvtap entered promiscuous mode [ 59.082676][ T6928] device veth1_macvtap entered promiscuous mode [ 59.102172][ T6928] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 59.110946][ T2509] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 59.120111][ T2509] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 59.129504][ T2509] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 59.138847][ T2509] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 59.151805][ T6928] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 59.160248][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 59.169367][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 59.396289][ T156] [ 59.398762][ T156] ============================= [ 59.403586][ T156] WARNING: suspicious RCU usage [ 59.409957][ T156] 5.7.0-syzkaller #0 Not tainted [ 59.414904][ T156] ----------------------------- [ 59.420180][ T156] include/linux/radix-tree.h:176 suspicious rcu_dereference_check() usage! [ 59.430166][ T156] [ 59.430166][ T156] other info that might help us debug this: [ 59.430166][ T156] [ 59.440514][ T156] [ 59.440514][ T156] rcu_scheduler_active = 2, debug_locks = 1 [ 59.449157][ T156] 2 locks held by kworker/u4:4/156: [ 59.454357][ T156] #0: ffff8880a9133938 ((wq_completion)qrtr_ns_handler){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 [ 59.465600][ T156] #1: ffffc90001567dc0 ((work_completion)(&qrtr_ns.work)){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 [ 59.476986][ T156] [ 59.476986][ T156] stack backtrace: [ 59.482874][ T156] CPU: 0 PID: 156 Comm: kworker/u4:4 Not tainted 5.7.0-syzkaller #0 [ 59.490834][ T156] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.500886][ T156] Workqueue: qrtr_ns_handler qrtr_ns_worker [ 59.506811][ T156] Call Trace: [ 59.510085][ T156] dump_stack+0x188/0x20d [ 59.514395][ T156] ctrl_cmd_new_lookup+0x6eb/0x7e0 [ 59.519508][ T156] ? qrtr_recvmsg+0x38a/0x810 [ 59.524165][ T156] ? node_get+0xd0/0xd0 [ 59.528323][ T156] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.533867][ T156] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.539826][ T156] ? qrtr_node_lookup+0xe0/0xe0 [ 59.544657][ T156] qrtr_ns_worker+0x5a1/0x153a [ 59.549416][ T156] ? ctrl_cmd_del_client.isra.0+0x6c0/0x6c0 [ 59.555290][ T156] ? lock_acquire+0x1f2/0x8f0 [ 59.559945][ T156] ? process_one_work+0x878/0x16a0 [ 59.565057][ T156] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.570591][ T156] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.576596][ T156] process_one_work+0x965/0x16a0 [ 59.581542][ T156] ? lock_release+0x800/0x800 [ 59.586207][ T156] ? pwq_dec_nr_in_flight+0x310/0x310 [ 59.591581][ T156] ? rwlock_bug.part.0+0x90/0x90 [ 59.596519][ T156] worker_thread+0x96/0xe20 [ 59.601005][ T156] ? process_one_work+0x16a0/0x16a0 [ 59.606185][ T156] kthread+0x388/0x470 [ 59.610229][ T156] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.615926][ T156] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 59.621622][ T156] ret_from_fork+0x24/0x30 [ 59.628648][ T156] failed to send lookup notification