[ 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 '10.128.15.193' (ECDSA) to the list of known hosts. 2020/05/27 00:42:16 parsed 1 programs 2020/05/27 00:42:17 executed programs: 0 syzkaller login: [ 43.094379] audit: type=1400 audit(1590540137.226:8): avc: denied { execmem } for pid=6472 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 43.130140] IPVS: ftp: loaded support on port[0] = 21 [ 43.219156] chnl_net:caif_netlink_parms(): no params data found [ 43.299419] bridge0: port 1(bridge_slave_0) entered blocking state [ 43.307334] bridge0: port 1(bridge_slave_0) entered disabled state [ 43.321449] device bridge_slave_0 entered promiscuous mode [ 43.329787] bridge0: port 2(bridge_slave_1) entered blocking state [ 43.336332] bridge0: port 2(bridge_slave_1) entered disabled state [ 43.344402] device bridge_slave_1 entered promiscuous mode [ 43.364238] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 43.373805] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 43.395789] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.404149] team0: Port device team_slave_0 added [ 43.414206] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.422172] team0: Port device team_slave_1 added [ 43.439344] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 43.445606] 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. [ 43.472334] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 43.484638] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 43.491635] 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. [ 43.521835] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 43.534266] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.542432] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 43.609283] device hsr_slave_0 entered promiscuous mode [ 43.646945] device hsr_slave_1 entered promiscuous mode [ 43.677299] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 43.686366] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 43.766882] bridge0: port 2(bridge_slave_1) entered blocking state [ 43.773759] bridge0: port 2(bridge_slave_1) entered forwarding state [ 43.781751] bridge0: port 1(bridge_slave_0) entered blocking state [ 43.788349] bridge0: port 1(bridge_slave_0) entered forwarding state [ 43.831706] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 43.838856] 8021q: adding VLAN 0 to HW filter on device bond0 [ 43.849514] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 43.859842] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 43.879674] bridge0: port 1(bridge_slave_0) entered disabled state [ 43.888003] bridge0: port 2(bridge_slave_1) entered disabled state [ 43.895759] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 43.910110] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 43.917500] 8021q: adding VLAN 0 to HW filter on device team0 [ 43.929635] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 43.937340] bridge0: port 1(bridge_slave_0) entered blocking state [ 43.943713] bridge0: port 1(bridge_slave_0) entered forwarding state [ 43.967169] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 43.975985] bridge0: port 2(bridge_slave_1) entered blocking state [ 43.982807] bridge0: port 2(bridge_slave_1) entered forwarding state [ 43.990474] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.998996] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 44.008028] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 44.018206] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 44.027866] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 44.038791] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 44.044827] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 44.060207] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 44.069309] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 44.076071] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 44.089715] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 44.103301] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 44.115614] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 44.152125] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 44.160227] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 44.168134] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 44.179505] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 44.187244] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 44.194171] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 44.204644] device veth0_vlan entered promiscuous mode [ 44.214869] device veth1_vlan entered promiscuous mode [ 44.231313] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 44.241292] IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready [ 44.249933] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 44.259055] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 44.271686] device veth0_macvtap entered promiscuous mode [ 44.278760] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 44.287690] device veth1_macvtap entered promiscuous mode [ 44.293932] IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready [ 44.304108] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 44.314532] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 44.324892] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready [ 44.333566] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 44.341135] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 44.349859] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 44.357307] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 44.365494] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 44.376240] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 44.383143] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 44.390158] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 44.399160] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 2020/05/27 00:42:19 result: hanged=false err=executor 0: exit status 67 failed to mkdir (errno 30) loop exited with status 67 failed to mkdir (errno 30) loop exited with status 67 [ 45.157076] syz-executor.0 (6473) used greatest stack depth: 23584 bytes left [ 45.249518] WARNING: CPU: 0 PID: 6699 at kernel/cgroup/cgroup.c:2992 cgroup_apply_control_disable+0x3fd/0x4c0 [ 45.259940] Kernel panic - not syncing: panic_on_warn set ... [ 45.259940] [ 45.267328] CPU: 0 PID: 6699 Comm: syz-executor.0 Not tainted 4.19.124-syzkaller #0 [ 45.276395] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.285740] Call Trace: [ 45.288346] dump_stack+0x1fc/0x2fe [ 45.291961] panic+0x26a/0x50e [ 45.295140] ? __warn_printk+0xf3/0xf3 [ 45.299031] ? cgroup_apply_control_disable+0x3fd/0x4c0 [ 45.304589] ? __probe_kernel_read+0x16c/0x1b0 [ 45.309180] ? __warn.cold+0x5/0x46 [ 45.312796] ? __warn+0xe4/0x1c0 [ 45.316191] ? cgroup_apply_control_disable+0x3fd/0x4c0 [ 45.321571] __warn.cold+0x20/0x46 [ 45.325227] ? cgroup_apply_control_disable+0x3fd/0x4c0 [ 45.331614] report_bug+0x262/0x2a0 [ 45.335245] do_error_trap+0x1d7/0x310 [ 45.339123] ? math_error+0x310/0x310 [ 45.342911] ? lock_acquire+0x170/0x3c0 [ 45.346876] ? mark_held_locks+0xa6/0xf0 [ 45.350998] ? trace_hardirqs_off_caller+0x69/0x210 [ 45.356075] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.361016] invalid_op+0x14/0x20 [ 45.364460] RIP: 0010:cgroup_apply_control_disable+0x3fd/0x4c0 [ 45.370532] Code: ff ff ff e8 b5 ed 05 00 48 89 ef 41 ff d5 e9 1a ff ff ff e8 a5 ed 05 00 48 89 ef e8 8d f4 fe ff e9 08 ff ff ff e8 93 ed 05 00 <0f> 0b e9 ab fd ff ff 48 83 c4 30 5b 5d 41 5c 41 5d 41 5e 41 5f e9 [ 45.389416] RSP: 0018:ffff8880877cf8d8 EFLAGS: 00010293 [ 45.394773] RAX: ffff8880a0574500 RBX: dffffc0000000000 RCX: ffffffff81619906 [ 45.403058] RDX: 0000000000000000 RSI: ffffffff81619b5d RDI: 0000000000000007 [ 45.410313] RBP: ffff8880a55fe340 R08: ffff8880a0574500 R09: ffffed1015cc473b [ 45.417575] R10: ffffed1015cc473a R11: ffff8880ae6239d3 R12: 0000000000000008 [ 45.424999] R13: 0000000000000002 R14: ffffffff88bf7060 R15: ffff8880a45d4240 [ 45.432267] ? cgroup_apply_control_disable+0x1a6/0x4c0 [ 45.438933] ? cgroup_apply_control_disable+0x3fd/0x4c0 [ 45.444301] ? cgroup_apply_control_disable+0x3fd/0x4c0 [ 45.449678] rebind_subsystems+0x3d9/0xaf0 [ 45.455056] ? cgroup_apply_control_disable+0x4c0/0x4c0 [ 45.460413] ? css_populate_dir+0x288/0x450 [ 45.464730] cgroup_setup_root+0x445/0xad0 [ 45.468954] ? rebind_subsystems+0xaf0/0xaf0 [ 45.475603] ? __lockdep_init_map+0x100/0x5a0 [ 45.480085] ? __raw_spin_lock_init+0x28/0x100 [ 45.484654] cgroup1_mount+0x6c1/0x1137 [ 45.488632] ? cgroup1_release_agent+0x2b0/0x2b0 [ 45.493513] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 45.498982] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 45.504077] ? cap_capable+0x1eb/0x250 [ 45.508085] ? security_capable+0x8e/0xc0 [ 45.512252] cgroup_mount+0x17b/0xa20 [ 45.516059] ? cgroup_attach_task+0x8b0/0x8b0 [ 45.520573] mount_fs+0xa3/0x30c [ 45.523965] vfs_kern_mount.part.0+0x68/0x400 [ 45.528989] do_mount+0x4f4/0x2b50 [ 45.532539] ? retint_kernel+0x2d/0x2d [ 45.536415] ? copy_mount_string+0x40/0x40 [ 45.540721] ? copy_mount_options+0x1d6/0x390 [ 45.545208] ? copy_mount_options+0x1f5/0x390 [ 45.550569] ? copy_mount_options+0x27a/0x390 [ 45.555078] ksys_mount+0xd7/0x150 [ 45.558611] __x64_sys_mount+0xba/0x150 [ 45.562609] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 45.567360] do_syscall_64+0xf9/0x620 [ 45.571154] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.576340] RIP: 0033:0x45f47a [ 45.579868] Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 8c fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 8c fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 45.599498] RSP: 002b:00007fff348e1738 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 45.607207] RAX: ffffffffffffffda RBX: 00007fff348e1790 RCX: 000000000045f47a [ 45.614991] RDX: 00000000004caf91 RSI: 00000000004c1665 RDI: 00000000004c1628 [ 45.622254] RBP: 0000000000000000 R08: 00000000004cfa00 R09: 000000000000001c [ 45.629603] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000418590 [ 45.637964] R13: 00007fff348e19b8 R14: 0000000000000000 R15: 0000000000000000 [ 45.646895] Kernel Offset: disabled [ 45.650613] Rebooting in 86400 seconds..