[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.208' (ECDSA) to the list of known hosts. 2020/05/21 10:04:14 parsed 1 programs 2020/05/21 10:04:14 executed programs: 0 syzkaller login: [ 115.034228][ T27] audit: type=1400 audit(1590055454.539:8): avc: denied { execmem } for pid=7067 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 115.079408][ T7068] IPVS: ftp: loaded support on port[0] = 21 [ 115.180784][ T7068] chnl_net:caif_netlink_parms(): no params data found [ 115.235003][ T7068] bridge0: port 1(bridge_slave_0) entered blocking state [ 115.243379][ T7068] bridge0: port 1(bridge_slave_0) entered disabled state [ 115.252813][ T7068] device bridge_slave_0 entered promiscuous mode [ 115.261865][ T7068] bridge0: port 2(bridge_slave_1) entered blocking state [ 115.268978][ T7068] bridge0: port 2(bridge_slave_1) entered disabled state [ 115.277400][ T7068] device bridge_slave_1 entered promiscuous mode [ 115.299620][ T7068] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 115.310847][ T7068] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 115.334169][ T7068] team0: Port device team_slave_0 added [ 115.341961][ T7068] team0: Port device team_slave_1 added [ 115.360136][ T7068] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 115.367261][ T7068] 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. [ 115.393435][ T7068] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 115.407087][ T7068] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 115.414136][ T7068] 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. [ 115.440679][ T7068] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 115.514171][ T7068] device hsr_slave_0 entered promiscuous mode [ 115.553079][ T7068] device hsr_slave_1 entered promiscuous mode [ 115.700370][ T7068] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 115.745150][ T7068] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 115.794429][ T7068] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 115.864381][ T7068] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 115.938612][ T7068] bridge0: port 2(bridge_slave_1) entered blocking state [ 115.945948][ T7068] bridge0: port 2(bridge_slave_1) entered forwarding state [ 115.954198][ T7068] bridge0: port 1(bridge_slave_0) entered blocking state [ 115.961544][ T7068] bridge0: port 1(bridge_slave_0) entered forwarding state [ 116.011915][ T7068] 8021q: adding VLAN 0 to HW filter on device bond0 [ 116.027047][ T2799] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 116.037215][ T2799] bridge0: port 1(bridge_slave_0) entered disabled state [ 116.046059][ T2799] bridge0: port 2(bridge_slave_1) entered disabled state [ 116.054923][ T2799] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 116.069790][ T7068] 8021q: adding VLAN 0 to HW filter on device team0 [ 116.081441][ T2725] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 116.090580][ T2725] bridge0: port 1(bridge_slave_0) entered blocking state [ 116.097716][ T2725] bridge0: port 1(bridge_slave_0) entered forwarding state [ 116.109613][ T2799] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 116.120443][ T2799] bridge0: port 2(bridge_slave_1) entered blocking state [ 116.127778][ T2799] bridge0: port 2(bridge_slave_1) entered forwarding state [ 116.147641][ T2725] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 116.157448][ T2725] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 116.169139][ T2799] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 116.179344][ T2799] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 116.196334][ T7068] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 116.207255][ T7068] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 116.221923][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 116.230364][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 116.240481][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 116.250097][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 116.259853][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 116.281896][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 116.289444][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 116.300112][ T7068] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 116.320867][ T2725] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 116.330225][ T2725] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 116.352720][ T2725] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 116.362393][ T2725] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 116.372755][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 116.380482][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 116.389173][ T7068] device veth0_vlan entered promiscuous mode [ 116.403585][ T7068] device veth1_vlan entered promiscuous mode [ 116.427504][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 116.436205][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 116.444901][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 116.454011][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 116.465764][ T7068] device veth0_macvtap entered promiscuous mode [ 116.477833][ T7068] device veth1_macvtap entered promiscuous mode [ 116.497590][ T7068] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 116.505558][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 116.514895][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 116.523856][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 116.532656][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 116.545047][ T7068] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 116.553040][ T2725] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 116.562550][ T2725] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 116.766666][ T7277] tipc: Started in network mode [ 116.773115][ T7277] tipc: Own node identity ff020000000000000000000000000001, cluster identity 4711 [ 116.783965][ T7277] tipc: Enabling of bearer rejected, failed to enable media [ 116.818710][ T7277] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/7277 [ 116.828595][ T7277] caller is dst_cache_get+0x3a/0xb0 [ 116.834518][ T7277] CPU: 1 PID: 7277 Comm: syz-executor.0 Not tainted 5.7.0-rc6-syzkaller #0 [ 116.843109][ T7277] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 116.853156][ T7277] Call Trace: [ 116.856430][ T7277] dump_stack+0x188/0x20d [ 116.860752][ T7277] debug_smp_processor_id.cold+0x88/0x9b [ 116.866894][ T7277] dst_cache_get+0x3a/0xb0 [ 116.871290][ T7277] ? lock_downgrade+0x840/0x840 [ 116.876142][ T7277] tipc_udp_xmit.isra.0+0xb9/0xad0 [ 116.881251][ T7277] ? tipc_udp_addr2str+0x160/0x160 [ 116.886528][ T7277] ? tipc_crypto_xmit+0xb3e/0x2c70 [ 116.891635][ T7277] ? rcu_read_lock_held+0x9c/0xb0 [ 116.896744][ T7277] ? rcu_read_lock_held_common+0x130/0x130 [ 116.902531][ T7277] tipc_udp_send_msg+0x3e6/0x490 [ 116.907548][ T7277] tipc_bearer_xmit_skb+0x1de/0x3f0 [ 116.912725][ T7277] ? tipc_bearer_mtu+0x4d0/0x4d0 [ 116.917642][ T7277] ? tipc_disc_create+0x705/0xa90 [ 116.922648][ T7277] tipc_enable_bearer+0xb2f/0xd60 [ 116.927670][ T7277] ? tipc_bearer_xmit_skb+0x3f0/0x3f0 [ 116.933246][ T7277] ? __nla_validate_parse+0x2af/0x1cd0 [ 116.938798][ T7277] ? __tipc_nl_bearer_enable+0x2bf/0x390 [ 116.944500][ T7277] __tipc_nl_bearer_enable+0x2bf/0x390 [ 116.949941][ T7277] ? tipc_nl_bearer_disable+0x30/0x30 [ 116.955406][ T7277] ? mutex_trylock+0x2c0/0x2c0 [ 116.960162][ T7277] ? nla_memcpy+0xa0/0xa0 [ 116.964480][ T7277] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 116.970440][ T7277] ? __nla_parse+0x2e/0x60 [ 116.974838][ T7277] ? genl_family_rcv_msg_attrs_parse+0x1bd/0x320 [ 116.981154][ T7277] tipc_nl_bearer_enable+0x1e/0x30 [ 116.986246][ T7277] genl_rcv_msg+0x627/0xdf0 [ 116.990731][ T7277] ? genl_family_rcv_msg_attrs_parse+0x320/0x320 [ 116.997051][ T7277] ? __dev_queue_xmit+0xbf2/0x30a0 [ 117.002140][ T7277] ? kmem_cache_alloc+0x6f5/0x740 [ 117.007933][ T7277] ? lock_release+0x800/0x800 [ 117.012945][ T7277] ? skb_splice_bits+0x1a0/0x1a0 [ 117.017859][ T7277] ? __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 117.023644][ T7277] netlink_rcv_skb+0x15a/0x410 [ 117.028404][ T7277] ? genl_family_rcv_msg_attrs_parse+0x320/0x320 [ 117.034709][ T7277] ? netlink_ack+0xa10/0xa10 [ 117.039285][ T7277] genl_rcv+0x24/0x40 [ 117.043356][ T7277] netlink_unicast+0x537/0x740 [ 117.048126][ T7277] ? netlink_attachskb+0x810/0x810 [ 117.053229][ T7277] ? _copy_from_iter_full+0x25c/0x870 [ 117.058599][ T7277] netlink_sendmsg+0x882/0xe10 [ 117.063345][ T7277] ? netlink_unicast+0x740/0x740 [ 117.068267][ T7277] ? netlink_unicast+0x740/0x740 [ 117.073384][ T7277] sock_sendmsg+0xcf/0x120 [ 117.077783][ T7277] ____sys_sendmsg+0x6bf/0x7e0 [ 117.082527][ T7277] ? kernel_sendmsg+0x50/0x50 [ 117.087200][ T7277] ___sys_sendmsg+0x100/0x170 [ 117.091873][ T7277] ? sendmsg_copy_msghdr+0x70/0x70 [ 117.096970][ T7277] ? __fget_files+0x32f/0x500 [ 117.101719][ T7277] ? ksys_dup3+0x3c0/0x3c0 [ 117.106116][ T7277] ? __fget_light+0x20e/0x270 [ 117.110772][ T7277] __sys_sendmsg+0xec/0x1b0 [ 117.115252][ T7277] ? __sys_sendmsg_sock+0xb0/0xb0 [ 117.120270][ T7277] ? __x64_sys_futex+0x380/0x4f0 [ 117.125200][ T7277] ? trace_hardirqs_off_caller+0x55/0x230 [ 117.130931][ T7277] ? do_syscall_64+0x21/0x7d0 [ 117.135609][ T7277] do_syscall_64+0xf6/0x7d0 [ 117.140094][ T7277] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 117.145963][ T7277] RIP: 0033:0x45ca29 [ 117.149832][ T7277] Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 117.169419][ T7277] RSP: 002b:00007fef83f8dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 117.177813][ T7277] RAX: ffffffffffffffda RBX: 0000000000500640 RCX: 000000000045ca29 [ 117.185775][ T7277] RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000004 [ 117.193739][ T7277] RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 [ 117.201994][ T7277] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 117.209944][ T7277] R13: 00000000000009e0 R14: 00000000004ccb11 R15: 00007fef83f8e6d4 [ 117.222607][ T7277] tipc: Enabled bearer , priority 10