[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 49.960458][ T23] audit: type=1800 audit(1580116865.618:25): pid=8544 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 49.979580][ T23] audit: type=1800 audit(1580116865.618:26): pid=8544 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 50.026698][ T23] audit: type=1800 audit(1580116865.618:27): pid=8544 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.246' (ECDSA) to the list of known hosts. syzkaller login: [ 61.089746][ T8698] IPVS: ftp: loaded support on port[0] = 21 [ 61.134269][ T8698] chnl_net:caif_netlink_parms(): no params data found [ 61.161604][ T8698] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.169557][ T8698] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.177737][ T8698] device bridge_slave_0 entered promiscuous mode [ 61.186900][ T8698] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.195351][ T8698] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.204296][ T8698] device bridge_slave_1 entered promiscuous mode [ 61.221167][ T8698] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 61.232031][ T8698] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 61.251213][ T8698] team0: Port device team_slave_0 added [ 61.259066][ T8698] team0: Port device team_slave_1 added [ 61.273896][ T8698] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 61.281487][ T8698] 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. [ 61.307956][ T8698] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 61.320881][ T8698] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 61.328144][ T8698] 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. [ 61.354447][ T8698] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 61.407979][ T8698] device hsr_slave_0 entered promiscuous mode [ 61.466416][ T8698] device hsr_slave_1 entered promiscuous mode [ 61.571048][ T8698] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 61.608281][ T8698] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 61.648827][ T8698] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 61.698064][ T8698] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 61.756627][ T8698] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.763973][ T8698] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.772152][ T8698] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.779592][ T8698] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.819653][ T8698] 8021q: adding VLAN 0 to HW filter on device bond0 [ 61.833330][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 61.844033][ T2678] bridge0: port 1(bridge_slave_0) entered disabled state [ 61.852623][ T2678] bridge0: port 2(bridge_slave_1) entered disabled state [ 61.862023][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 61.875181][ T8698] 8021q: adding VLAN 0 to HW filter on device team0 [ 61.887764][ T3589] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 61.898423][ T3589] bridge0: port 1(bridge_slave_0) entered blocking state [ 61.906419][ T3589] bridge0: port 1(bridge_slave_0) entered forwarding state [ 61.918129][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 61.927318][ T2678] bridge0: port 2(bridge_slave_1) entered blocking state [ 61.934722][ T2678] bridge0: port 2(bridge_slave_1) entered forwarding state [ 61.956837][ T3589] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 61.977127][ T3579] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 61.988654][ T3579] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 61.997652][ T3579] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 62.006244][ T3579] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 62.016017][ T8698] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 62.033901][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 62.042387][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 62.053717][ T8698] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 62.072173][ T3579] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 62.088846][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 62.098368][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 62.106605][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 62.117380][ T8698] device veth0_vlan entered promiscuous mode [ 62.128536][ T8698] device veth1_vlan entered promiscuous mode [ 62.137854][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 62.155506][ T3579] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 62.164526][ T3579] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 62.176189][ T8698] device veth0_macvtap entered promiscuous mode [ 62.185515][ T8698] device veth1_macvtap entered promiscuous mode [ 62.200649][ T8698] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 62.208344][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 62.217062][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 62.224908][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready executing program [ 62.233855][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 62.245239][ T8698] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 62.253658][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 62.262549][ T2678] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 62.761694][ T8702] kasan: CONFIG_KASAN_INLINE enabled [ 62.767119][ T8702] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 62.775169][ T8702] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 62.782092][ T8702] CPU: 1 PID: 8702 Comm: syz-executor858 Not tainted 5.5.0-rc7-syzkaller #0 [ 62.791034][ T8702] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.801628][ T8702] RIP: 0010:__lock_acquire+0x86/0x1bc0 [ 62.807072][ T8702] Code: 8a 04 30 84 c0 0f 85 4b 12 00 00 83 3d c2 4d e9 07 00 0f 84 76 12 00 00 83 3d 95 af b1 07 00 74 34 48 8b 44 24 10 48 c1 e8 03 <80> 3c 30 00 74 14 48 8b 7c 24 10 e8 ea 51 57 00 48 be 00 00 00 00 [ 62.826661][ T8702] RSP: 0018:ffffc90002157ad0 EFLAGS: 00010006 [ 62.832847][ T8702] RAX: 0000000000000003 RBX: 0000000000000001 RCX: 0000000000000000 [ 62.840872][ T8702] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000018 [ 62.848834][ T8702] RBP: ffffc90002157c30 R08: 0000000000000001 R09: 0000000000000001 [ 62.856787][ T8702] R10: fffffbfff1289115 R11: 0000000000000000 R12: 0000000000000000 [ 62.864754][ T8702] R13: 0000000000000001 R14: 0000000000000000 R15: ffff88808ffc60c0 [ 62.872747][ T8702] FS: 00007f6a28682700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 62.881825][ T8702] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.888468][ T8702] CR2: 00000000004ad7a0 CR3: 000000009f998000 CR4: 00000000001406e0 [ 62.896590][ T8702] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.904788][ T8702] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.912843][ T8702] Call Trace: [ 62.916223][ T8702] ? __kasan_check_read+0x11/0x20 [ 62.921242][ T8702] ? mark_lock+0x107/0x1650 [ 62.925729][ T8702] ? trace_lock_acquire+0x15b/0x1d0 [ 62.930986][ T8702] lock_acquire+0x154/0x250 [ 62.935479][ T8702] ? prepare_to_wait+0x55/0x240 [ 62.940497][ T8702] _raw_spin_lock_irqsave+0xa1/0xc0 [ 62.945855][ T8702] ? prepare_to_wait+0x55/0x240 [ 62.950735][ T8702] prepare_to_wait+0x55/0x240 [ 62.955390][ T8702] ? local_bh_enable+0x1f/0x30 [ 62.960235][ T8702] ? lock_sock_nested+0xd6/0x120 [ 62.965182][ T8702] nr_accept+0x29d/0x600 [ 62.969466][ T8702] ? init_wait_entry+0xe0/0xe0 [ 62.974282][ T8702] ? nr_connect+0xdb0/0xdb0 [ 62.978774][ T8702] __sys_accept4_file+0x4f0/0x890 [ 62.983853][ T8702] __x64_sys_accept+0xa5/0xf0 [ 62.988534][ T8702] do_syscall_64+0xf7/0x1c0 [ 62.993084][ T8702] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.998954][ T8702] RIP: 0033:0x447fd9 [ 63.002851][ T8702] Code: e8 ec 14 03 00 48 83 c4 18 c3 0f 1f 80 00 00 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 0f 83 8b 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 63.022455][ T8702] RSP: 002b:00007f6a28681db8 EFLAGS: 00000246 ORIG_RAX: 000000000000002b [ 63.030854][ T8702] RAX: ffffffffffffffda RBX: 00000000006ddc68 RCX: 0000000000447fd9 [ 63.038987][ T8702] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 63.046995][ T8702] RBP: 00000000006ddc60 R08: 0000000000000000 R09: 0000000000000000 [ 63.054953][ T8702] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc6c [ 63.062910][ T8702] R13: 00007ffc4065feef R14: 00007f6a286829c0 R15: 000000000000002d [ 63.071911][ T8702] Modules linked in: [ 63.075799][ T8702] ---[ end trace 28a96a3039503b59 ]--- [ 63.081280][ T8702] RIP: 0010:__lock_acquire+0x86/0x1bc0 [ 63.086724][ T8702] Code: 8a 04 30 84 c0 0f 85 4b 12 00 00 83 3d c2 4d e9 07 00 0f 84 76 12 00 00 83 3d 95 af b1 07 00 74 34 48 8b 44 24 10 48 c1 e8 03 <80> 3c 30 00 74 14 48 8b 7c 24 10 e8 ea 51 57 00 48 be 00 00 00 00 [ 63.106457][ T8702] RSP: 0018:ffffc90002157ad0 EFLAGS: 00010006 [ 63.112663][ T8702] RAX: 0000000000000003 RBX: 0000000000000001 RCX: 0000000000000000 [ 63.120656][ T8702] RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000018 [ 63.128744][ T8702] RBP: ffffc90002157c30 R08: 0000000000000001 R09: 0000000000000001 [ 63.136791][ T8702] R10: fffffbfff1289115 R11: 0000000000000000 R12: 0000000000000000 [ 63.144751][ T8702] R13: 0000000000000001 R14: 0000000000000000 R15: ffff88808ffc60c0 [ 63.152713][ T8702] FS: 00007f6a28682700(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 63.161626][ T8702] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 63.168192][ T8702] CR2: 00000000004ad7a0 CR3: 000000009f998000 CR4: 00000000001406e0 [ 63.176170][ T8702] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 63.184129][ T8702] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 63.192250][ T8702] Kernel panic - not syncing: Fatal exception [ 63.199781][ T8702] Kernel Offset: disabled [ 63.204202][ T8702] Rebooting in 86400 seconds..