[ 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 '10.128.0.225' (ECDSA) to the list of known hosts. syzkaller login: [ 512.848423][ T27] audit: type=1400 audit(1595563134.866:8): avc: denied { execmem } for pid=6836 comm="syz-executor468" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 512.867426][ T6837] IPVS: ftp: loaded support on port[0] = 21 [ 512.948112][ T6837] chnl_net:caif_netlink_parms(): no params data found [ 512.996189][ T6837] bridge0: port 1(bridge_slave_0) entered blocking state [ 513.003691][ T6837] bridge0: port 1(bridge_slave_0) entered disabled state [ 513.013627][ T6837] device bridge_slave_0 entered promiscuous mode [ 513.022933][ T6837] bridge0: port 2(bridge_slave_1) entered blocking state [ 513.030155][ T6837] bridge0: port 2(bridge_slave_1) entered disabled state [ 513.037976][ T6837] device bridge_slave_1 entered promiscuous mode [ 513.057223][ T6837] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 513.068149][ T6837] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 513.089766][ T6837] team0: Port device team_slave_0 added [ 513.097493][ T6837] team0: Port device team_slave_1 added [ 513.116248][ T6837] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 513.123195][ T6837] 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. [ 513.150174][ T6837] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 513.164610][ T6837] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 513.171685][ T6837] 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. [ 513.197666][ T6837] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 513.258549][ T6837] device hsr_slave_0 entered promiscuous mode [ 513.295709][ T6837] device hsr_slave_1 entered promiscuous mode [ 513.420405][ T6837] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 513.479153][ T6837] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 513.527934][ T6837] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 513.618518][ T6837] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 513.691339][ T6837] bridge0: port 2(bridge_slave_1) entered blocking state [ 513.698652][ T6837] bridge0: port 2(bridge_slave_1) entered forwarding state [ 513.706478][ T6837] bridge0: port 1(bridge_slave_0) entered blocking state [ 513.713534][ T6837] bridge0: port 1(bridge_slave_0) entered forwarding state [ 513.757013][ T6837] 8021q: adding VLAN 0 to HW filter on device bond0 [ 513.770145][ T2525] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 513.780378][ T2525] bridge0: port 1(bridge_slave_0) entered disabled state [ 513.788851][ T2525] bridge0: port 2(bridge_slave_1) entered disabled state [ 513.798116][ T2525] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 513.810740][ T6837] 8021q: adding VLAN 0 to HW filter on device team0 [ 513.822284][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 513.831232][ T6965] bridge0: port 1(bridge_slave_0) entered blocking state [ 513.838342][ T6965] bridge0: port 1(bridge_slave_0) entered forwarding state [ 513.856326][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 513.864622][ T7046] bridge0: port 2(bridge_slave_1) entered blocking state [ 513.871716][ T7046] bridge0: port 2(bridge_slave_1) entered forwarding state [ 513.893761][ T6837] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 513.904414][ T6837] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 513.918549][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 513.928385][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 513.936880][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 513.945692][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 513.954124][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 513.962720][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 513.984623][ T6837] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 513.992888][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 514.001542][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 514.033207][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 514.042122][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 514.050995][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 514.059239][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 514.068981][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 514.076753][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 514.087701][ T6837] device veth0_vlan entered promiscuous mode [ 514.099811][ T6837] device veth1_vlan entered promiscuous mode [ 514.120379][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 514.129719][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 514.139202][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 514.148028][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 514.158588][ T6837] device veth0_macvtap entered promiscuous mode [ 514.169143][ T6837] device veth1_macvtap entered promiscuous mode [ 514.186623][ T6837] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 514.194002][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 514.203029][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 514.211570][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 514.220868][ T6965] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 514.233862][ T6837] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 514.241401][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 514.250665][ T7046] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program [ 619.439514][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 619.446628][ C1] rcu: 0-...0: (1 GPs behind) idle=85a/1/0x4000000000000000 softirq=10878/10879 fqs=5250 [ 619.456781][ C1] (detected by 1, t=10502 jiffies, g=10525, q=4077) [ 619.463530][ C1] Sending NMI from CPU 1 to CPUs 0: [ 619.469814][ C1] NMI backtrace for cpu 0 [ 619.469821][ C1] CPU: 0 PID: 6837 Comm: syz-executor468 Not tainted 5.8.0-rc6-syzkaller #0 [ 619.469828][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 619.469833][ C1] RIP: 0010:rcu_lockdep_current_cpu_online+0x21/0x110 [ 619.469845][ C1] Code: 2e 0f 1f 84 00 00 00 00 00 65 8b 15 89 44 a1 7e 81 e2 00 00 f0 00 b8 01 00 00 00 75 0a 8b 15 ea 18 4e 09 85 d2 75 01 c3 55 53 <48> 83 ec 08 65 ff 05 64 44 a1 7e e8 9f 1d 85 06 48 c7 c3 00 6c 03 [ 619.469849][ C1] RSP: 0018:ffffc90000007dc0 EFLAGS: 00000002 [ 619.469858][ C1] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 1ffffffff1303928 [ 619.469863][ C1] RDX: 0000000000000001 RSI: 0000000000010003 RDI: ffff8880ae636cd8 [ 619.469869][ C1] RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8aaed24f [ 619.469875][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 619.469881][ C1] R13: ffff8880ae627840 R14: ffff88809f111340 R15: dffffc0000000000 [ 619.469887][ C1] FS: 000000000078d880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 619.469898][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 619.469903][ C1] CR2: 0000000020000610 CR3: 00000000a15d3000 CR4: 00000000001406f0 [ 619.469909][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 619.469915][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 619.469918][ C1] Call Trace: [ 619.469921][ C1] [ 619.469925][ C1] rcu_read_lock_sched_held+0x25/0xb0 [ 619.469929][ C1] __hrtimer_run_queues+0xd9f/0xfc0 [ 619.469933][ C1] ? taprio_dequeue_soft+0xa40/0xa40 [ 619.469938][ C1] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 619.469943][ C1] ? ktime_get_update_offsets_now+0x1c4/0x250 [ 619.469947][ C1] hrtimer_interrupt+0x32a/0x930 [ 619.469951][ C1] __sysvec_apic_timer_interrupt+0x142/0x5e0 [ 619.469955][ C1] asm_call_on_stack+0xf/0x20 [ 619.469958][ C1] [ 619.469963][ C1] sysvec_apic_timer_interrupt+0xe0/0x120 [ 619.469967][ C1] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 619.469972][ C1] RIP: 0010:on_each_cpu+0x149/0x240 [ 619.469983][ C1] Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 e6 00 00 00 48 83 3d 0f 0e 4c 08 00 0f 84 af 00 00 00 e8 0c ea 0a 00 48 89 df 57 9d <0f> 1f 44 00 00 e8 fd e9 0a 00 bf 01 00 00 00 e8 13 a0 e6 ff 31 ff [ 619.469988][ C1] RSP: 0018:ffffc90001077d70 EFLAGS: 00000293 [ 619.469996][ C1] RAX: 0000000000000000 RBX: 0000000000000293 RCX: 0000000000000000 [ 619.470002][ C1] RDX: ffff8880a253e440 RSI: ffffffff8168d284 RDI: 0000000000000293 [ 619.470007][ C1] RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000 [ 619.470013][ C1] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000 [ 619.470019][ C1] R13: 0000000000000000 R14: ffffc90001077ed0 R15: ffffffffa0e5a582 [ 619.470023][ C1] ? on_each_cpu+0x144/0x240 [ 619.470027][ C1] clock_was_set+0x18/0x20 [ 619.470031][ C1] do_settimeofday64+0x350/0x4e0 [ 619.470034][ C1] ? cap_capable+0x1eb/0x250 [ 619.470039][ C1] ? change_clocksource+0x200/0x200 [ 619.470042][ C1] ? capable+0xdd/0x100 [ 619.470047][ C1] do_sys_settimeofday64+0x1de/0x260 [ 619.470051][ C1] __x64_sys_clock_settime+0x197/0x260 [ 619.470055][ C1] ? exit_itimers+0x2d0/0x2d0 [ 619.470059][ C1] ? lock_is_held_type+0xb0/0xe0 [ 619.470063][ C1] ? do_syscall_64+0x1c/0xe0 [ 619.470067][ C1] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 619.470071][ C1] do_syscall_64+0x60/0xe0 [ 619.470076][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 619.470079][ C1] RIP: 0033:0x443849 [ 619.470083][ C1] Code: Bad RIP value. [ 619.470087][ C1] RSP: 002b:00007ffd8ef9e198 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 [ 619.470097][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443849 [ 619.470103][ C1] RDX: 0000000000443849 RSI: 0000000020000400 RDI: 0000000000000000 [ 619.470109][ C1] RBP: 00007ffd8ef9e1a0 R08: 0000000001bbbbbb R09: 0000000001bbbbbb [ 619.470114][ C1] R10: 0000000001bbbbbb R11: 0000000000000246 R12: 00007ffd8ef9e1b0 [ 619.470120][ C1] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000