[ 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 '10.128.1.42' (ECDSA) to the list of known hosts. 2020/06/27 10:49:22 fuzzer started 2020/06/27 10:49:22 dialing manager at 10.128.0.105:33697 2020/06/27 10:49:22 syscalls: 3105 2020/06/27 10:49:22 code coverage: enabled 2020/06/27 10:49:22 comparison tracing: enabled 2020/06/27 10:49:22 extra coverage: enabled 2020/06/27 10:49:22 setuid sandbox: enabled 2020/06/27 10:49:22 namespace sandbox: enabled 2020/06/27 10:49:22 Android sandbox: /sys/fs/selinux/policy does not exist 2020/06/27 10:49:22 fault injection: enabled 2020/06/27 10:49:22 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/06/27 10:49:22 net packet injection: enabled 2020/06/27 10:49:22 net device setup: enabled 2020/06/27 10:49:22 concurrency sanitizer: enabled 2020/06/27 10:49:22 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/06/27 10:49:22 USB emulation: enabled 10:49:23 executing program 0: r0 = socket$nl_netfilter(0x10, 0x3, 0xc) sendmsg$IPSET_CMD_CREATE(r0, &(0x7f0000000200)={0x0, 0x0, &(0x7f0000000080)={&(0x7f0000000000)={0x54, 0x2, 0x6, 0x101, 0x0, 0x0, {}, [@IPSET_ATTR_TYPENAME={0x10, 0x3, 'hash:ip,mac\x00'}, @IPSET_ATTR_REVISION={0x5}, @IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_FAMILY={0x5, 0x5, 0xa}, @IPSET_ATTR_PROTOCOL={0x5, 0x1, 0x6}, @IPSET_ATTR_DATA={0xc, 0x7, 0x0, 0x1, [@IPSET_ATTR_TIMEOUT={0x8, 0x8}]}]}, 0x54}}, 0x0) syzkaller login: [ 32.007969][ T8641] IPVS: ftp: loaded support on port[0] = 21 10:49:23 executing program 1: r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000200)='/dev/kvm\x00', 0x0, 0x0) r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0) r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0) ioctl$KVM_SET_LAPIC(r2, 0x4008ae89, &(0x7f0000001a40)={"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"}) [ 32.063467][ T8641] chnl_net:caif_netlink_parms(): no params data found [ 32.094051][ T8641] bridge0: port 1(bridge_slave_0) entered blocking state [ 32.101834][ T8641] bridge0: port 1(bridge_slave_0) entered disabled state [ 32.109755][ T8641] device bridge_slave_0 entered promiscuous mode [ 32.118324][ T8641] bridge0: port 2(bridge_slave_1) entered blocking state [ 32.125430][ T8641] bridge0: port 2(bridge_slave_1) entered disabled state [ 32.133314][ T8641] device bridge_slave_1 entered promiscuous mode [ 32.148559][ T8641] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 32.159129][ T8641] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 32.177497][ T8641] team0: Port device team_slave_0 added [ 32.184180][ T8641] team0: Port device team_slave_1 added [ 32.199109][ T8641] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 32.206086][ T8641] 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. [ 32.232629][ T8641] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 32.244359][ T8641] batman_adv: batadv0: Adding interface: batadv_slave_1 10:49:24 executing program 2: r0 = openat$tun(0xffffffffffffff9c, &(0x7f0000000200)='/dev/net/tun\x00', 0x88002, 0x0) ioctl$TUNSETIFF(r0, 0x400454ca, &(0x7f00000000c0)={'syzkaller1\x00', 0x420000015001}) r1 = socket$netlink(0x10, 0x3, 0x0) ioctl$sock_inet_SIOCSIFADDR(r1, 0x8914, &(0x7f0000000140)={'syzkaller1\x00', {0x7}}) write$tun(r0, &(0x7f0000000040)={@void, @val, @mpls={[], @ipv4=@udp={{0x5, 0x4, 0x0, 0x0, 0x20, 0x0, 0x0, 0x0, 0x6, 0x0, @empty, @empty}, {0x0, 0x0, 0xc, 0x0, @gue={{0x1, 0x0, 0x0, 0x0, 0x0, @void}}}}}}, 0x2a) [ 32.251910][ T8641] 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. [ 32.278403][ T8641] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 32.293802][ T8795] IPVS: ftp: loaded support on port[0] = 21 [ 32.358345][ T8641] device hsr_slave_0 entered promiscuous mode [ 32.387253][ T8641] device hsr_slave_1 entered promiscuous mode [ 32.443715][ T8807] IPVS: ftp: loaded support on port[0] = 21 [ 32.512993][ T8795] chnl_net:caif_netlink_parms(): no params data found [ 32.560280][ T7] ================================================================== [ 32.568375][ T7] BUG: KCSAN: data-race in copy_process / release_task [ 32.575200][ T7] [ 32.577530][ T7] write to 0xffffffff89281410 of 4 bytes by task 8977 on cpu 1: [ 32.585144][ T7] release_task+0x6c8/0xb90 [ 32.589625][ T7] do_exit+0x1140/0x16e0 [ 32.593845][ T7] call_usermodehelper_exec_async+0x2da/0x2e0 [ 32.599889][ T7] ret_from_fork+0x1f/0x30 [ 32.604277][ T7] [ 32.606586][ T7] read to 0xffffffff89281410 of 4 bytes by task 7 on cpu 0: [ 32.613846][ T7] copy_process+0xab5/0x32b0 [ 32.618415][ T7] _do_fork+0xf1/0x660 [ 32.622464][ T7] kernel_thread+0x85/0xb0 [ 32.626967][ T7] call_usermodehelper_exec_work+0x4f/0x1b0 [ 32.632839][ T7] process_one_work+0x3cb/0x990 [ 32.637665][ T7] worker_thread+0x665/0xbe0 [ 32.642228][ T7] kthread+0x210/0x220 [ 32.646274][ T7] ret_from_fork+0x1f/0x30 [ 32.650658][ T7] [ 32.652959][ T7] Reported by Kernel Concurrency Sanitizer on: [ 32.659086][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc2-syzkaller #0 [ 32.667210][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.677254][ T7] Workqueue: events_unbound call_usermodehelper_exec_work [ 32.684337][ T7] ================================================================== [ 32.692383][ T7] Kernel panic - not syncing: panic_on_warn set ... [ 32.698949][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0-rc2-syzkaller #0 [ 32.707075][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 32.717134][ T7] Workqueue: events_unbound call_usermodehelper_exec_work [ 32.724230][ T7] Call Trace: [ 32.727527][ T7] dump_stack+0x10f/0x19d [ 32.731836][ T7] panic+0x1f8/0x63a [ 32.735709][ T7] ? vprintk_emit+0x44a/0x4f0 [ 32.740370][ T7] kcsan_report+0x684/0x690 [ 32.744855][ T7] ? kcsan_setup_watchpoint+0x453/0x4d0 [ 32.750375][ T7] ? copy_process+0xab5/0x32b0 [ 32.755113][ T7] ? _do_fork+0xf1/0x660 [ 32.759331][ T7] ? kernel_thread+0x85/0xb0 [ 32.763917][ T7] ? call_usermodehelper_exec_work+0x4f/0x1b0 [ 32.769961][ T7] ? process_one_work+0x3cb/0x990 [ 32.774963][ T7] ? worker_thread+0x665/0xbe0 [ 32.779707][ T7] ? kthread+0x210/0x220 [ 32.783927][ T7] ? ret_from_fork+0x1f/0x30 [ 32.788539][ T7] ? debug_smp_processor_id+0x18/0x20 [ 32.793896][ T7] ? sysvec_hyperv_callback+0x90/0x140 [ 32.799337][ T7] ? copy_creds+0x280/0x350 [ 32.803821][ T7] ? copy_creds+0x280/0x350 [ 32.808303][ T7] kcsan_setup_watchpoint+0x453/0x4d0 [ 32.813656][ T7] ? copy_creds+0x280/0x350 [ 32.818144][ T7] copy_process+0xab5/0x32b0 [ 32.822717][ T7] ? check_preempt_wakeup+0x1cb/0x370 [ 32.828069][ T7] ? proc_cap_handler+0x280/0x280 [ 32.833068][ T7] _do_fork+0xf1/0x660 [ 32.837888][ T7] ? check_preemption_disabled+0x3f/0x1a0 [ 32.843587][ T7] ? proc_cap_handler+0x280/0x280 [ 32.848599][ T7] kernel_thread+0x85/0xb0 [ 32.852995][ T7] ? proc_cap_handler+0x280/0x280 [ 32.858002][ T7] call_usermodehelper_exec_work+0x4f/0x1b0 [ 32.863880][ T7] ? __list_del_entry_valid+0x54/0xc0 [ 32.869235][ T7] process_one_work+0x3cb/0x990 [ 32.874066][ T7] worker_thread+0x665/0xbe0 [ 32.878634][ T7] ? process_one_work+0x990/0x990 [ 32.883651][ T7] kthread+0x210/0x220 [ 32.887703][ T7] ? process_one_work+0x990/0x990 [ 32.892708][ T7] ? constant_test_bit+0x30/0x30 [ 32.897631][ T7] ret_from_fork+0x1f/0x30 [ 32.902700][ T7] Kernel Offset: disabled [ 32.907007][ T7] Rebooting in 86400 seconds..