[ 37.305623] audit: type=1800 audit(1545804808.452:25): pid=7672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 37.326496] audit: type=1800 audit(1545804808.452:26): pid=7672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 37.347767] audit: type=1800 audit(1545804808.452:27): pid=7672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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. [ 37.979894] startpar (7672) used greatest stack depth: 15736 bytes left Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.192' (ECDSA) to the list of known hosts. RTNETLINK answers: No buffer space available RTNETLINK answers: No buffer space available net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 syzkaller login: [ 65.448872] IPVS: ftp: loaded support on port[0] = 21 [ 65.694107] bridge0: port 1(bridge_slave_0) entered blocking state [ 65.700773] bridge0: port 1(bridge_slave_0) entered disabled state [ 65.708271] device bridge_slave_0 entered promiscuous mode [ 65.726157] bridge0: port 2(bridge_slave_1) entered blocking state [ 65.732653] bridge0: port 2(bridge_slave_1) entered disabled state [ 65.739465] device bridge_slave_1 entered promiscuous mode [ 65.757408] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 65.775163] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 65.826324] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 65.847772] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 65.924198] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 65.931439] team0: Port device team_slave_0 added [ 65.948958] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 65.956307] team0: Port device team_slave_1 added [ 65.972858] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.994147] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 66.014104] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 66.035836] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 66.181939] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.188427] bridge0: port 2(bridge_slave_1) entered forwarding state [ 66.195598] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.201989] bridge0: port 1(bridge_slave_0) entered forwarding state RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 66.738334] 8021q: adding VLAN 0 to HW filter on device bond0 [ 66.790251] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 66.843638] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 66.849753] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 66.859146] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 66.908739] 8021q: adding VLAN 0 to HW filter on device team0 executing program [ 67.184813] kasan: CONFIG_KASAN_INLINE enabled [ 67.189455] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 67.196879] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 67.203124] CPU: 1 PID: 7824 Comm: syz-executor809 Not tainted 4.20.0-rc7+ #360 [ 67.210557] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.219891] RIP: 0010:fdb_find_rcu+0x194/0xc90 [ 67.224464] Code: 40 84 c6 0f 85 23 09 00 00 84 c9 0f 95 c2 0f 9e c0 84 c2 0f 85 13 09 00 00 48 b9 00 00 00 00 00 fc ff df 4c 89 e0 48 c1 e8 03 <0f> b6 14 08 49 8d 44 24 05 48 89 c6 48 c1 ee 03 0f b6 0c 0e 4c 89 [ 67.243350] RSP: 0018:ffff8881b932f0b8 EFLAGS: 00010246 [ 67.248691] RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 [ 67.255937] RDX: 0000000000000000 RSI: 1ffff11037265e01 RDI: ffff8881b932f1a8 [ 67.263184] RBP: ffff8881b932f310 R08: ffff8881bcc84400 R09: ffffed103b5a5b77 [ 67.270428] R10: ffffed103b5a5b77 R11: ffff8881dad2dbbb R12: 0000000000000000 [ 67.277671] R13: 0000000000000001 R14: ffff8881b9e68f40 R15: ffff8881b932f2e8 [ 67.284920] FS: 0000000001e8e880(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000 [ 67.293137] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.298997] CR2: 0000000020000180 CR3: 00000001bec05000 CR4: 00000000001406e0 [ 67.306244] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.313492] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.320739] Call Trace: [ 67.323315] ? __kmalloc_node_track_caller+0x3c/0x70 [ 67.328419] ? rcu_read_lock_sched_held+0x108/0x120 [ 67.333418] ? kmem_cache_alloc_node_trace+0x34b/0x740 [ 67.338707] ? kasan_kmalloc+0xc7/0xe0 [ 67.342642] ? br_fdb_clear_offload+0x370/0x370 [ 67.347300] ? __kmalloc_node_track_caller+0x50/0x70 [ 67.352388] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 67.357911] ? lock_acquire+0x1ed/0x520 [ 67.361885] ? br_fdb_dump+0x710/0x710 [ 67.365757] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.371295] ? check_preemption_disabled+0x48/0x280 [ 67.376298] ? kasan_check_read+0x11/0x20 [ 67.380437] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 67.385694] ? rcu_softirq_qs+0x20/0x20 [ 67.389650] ? netdev_master_upper_dev_get+0x173/0x250 [ 67.394911] br_fdb_get+0xac/0x230 [ 67.398429] ? br_fdb_dump+0x710/0x710 [ 67.402297] rtnl_fdb_get+0x8a0/0x13b0 [ 67.406171] ? rtnetlink_bind+0x90/0x90 [ 67.410121] ? graph_lock+0x270/0x270 [ 67.413920] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.419435] ? check_preemption_disabled+0x48/0x280 [ 67.424434] ? __lock_is_held+0xb5/0x140 [ 67.428474] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 67.433989] ? rtnl_get_link+0x170/0x370 [ 67.438029] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 67.443286] ? rtnetlink_bind+0x90/0x90 [ 67.447240] rtnetlink_rcv_msg+0x46a/0xc20 [ 67.451457] ? rtnetlink_put_metrics+0x690/0x690 [ 67.456199] netlink_rcv_skb+0x16c/0x430 [ 67.460257] ? rtnetlink_put_metrics+0x690/0x690 [ 67.465025] ? netlink_ack+0xb70/0xb70 [ 67.468899] rtnetlink_rcv+0x1c/0x20 [ 67.472594] netlink_unicast+0x59f/0x750 [ 67.476745] ? netlink_attachskb+0x9a0/0x9a0 [ 67.481152] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.486678] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 67.491680] netlink_sendmsg+0xa18/0xfc0 [ 67.495734] ? netlink_unicast+0x750/0x750 [ 67.499950] ? aa_sock_msg_perm.isra.14+0xba/0x160 [ 67.504893] ? apparmor_socket_sendmsg+0x29/0x30 [ 67.509645] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.515165] ? security_socket_sendmsg+0x94/0xc0 [ 67.519900] ? netlink_unicast+0x750/0x750 [ 67.524118] sock_sendmsg+0xd5/0x120 [ 67.527821] ___sys_sendmsg+0x7fd/0x930 [ 67.531779] ? copy_msghdr_from_user+0x580/0x580 [ 67.536518] ? graph_lock+0x270/0x270 [ 67.540301] ? print_usage_bug+0xc0/0xc0 [ 67.544362] ? lock_downgrade+0x900/0x900 [ 67.548496] ? check_preemption_disabled+0x48/0x280 [ 67.553501] ? graph_lock+0x270/0x270 [ 67.557299] ? graph_lock+0x270/0x270 [ 67.561079] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.566598] ? __fget_light+0x2e9/0x430 [ 67.570680] ? fget_raw+0x20/0x20 [ 67.574126] ? __do_page_fault+0x620/0xe60 [ 67.578350] ? lock_downgrade+0x900/0x900 [ 67.582481] ? rcu_read_unlock_special+0x1d0/0x1d0 [ 67.587388] ? kasan_check_read+0x11/0x20 [ 67.591533] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 67.597053] ? sockfd_lookup_light+0xc5/0x160 [ 67.601527] __sys_sendmsg+0x11d/0x280 [ 67.605400] ? __ia32_sys_shutdown+0x80/0x80 [ 67.609789] ? up_read_non_owner+0x100/0x100 [ 67.614181] ? do_syscall_64+0x9a/0x820 [ 67.618153] ? do_syscall_64+0x9a/0x820 [ 67.622110] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 67.627541] __x64_sys_sendmsg+0x78/0xb0 [ 67.631588] do_syscall_64+0x1b9/0x820 [ 67.635454] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 67.640794] ? syscall_return_slowpath+0x5e0/0x5e0 [ 67.645705] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 67.650552] ? trace_hardirqs_on_caller+0x310/0x310 [ 67.655547] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 67.660541] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.666055] ? prepare_exit_to_usermode+0x291/0x3b0 [ 67.671051] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 67.675890] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.681073] RIP: 0033:0x441679 [ 67.684246] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 67.703160] RSP: 002b:00007fff99382768 EFLAGS: 00000213 ORIG_RAX: 000000000000002e [ 67.710847] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441679 [ 67.718094] RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 [ 67.725346] RBP: 00000000006cd018 R08: 0000000000000100 R09: 0000000000000100 [ 67.732593] R10: 0000000000000020 R11: 0000000000000213 R12: 0000000000402430 [ 67.739842] R13: 00000000004024c0 R14: 0000000000000000 R15: 0000000000000000 [ 67.747095] Modules linked in: [ 67.751558] ---[ end trace d6d5286333ca98b5 ]--- [ 67.756390] RIP: 0010:fdb_find_rcu+0x194/0xc90 [ 67.760972] Code: 40 84 c6 0f 85 23 09 00 00 84 c9 0f 95 c2 0f 9e c0 84 c2 0f 85 13 09 00 00 48 b9 00 00 00 00 00 fc ff df 4c 89 e0 48 c1 e8 03 <0f> b6 14 08 49 8d 44 24 05 48 89 c6 48 c1 ee 03 0f b6 0c 0e 4c 89 [ 67.780003] RSP: 0018:ffff8881b932f0b8 EFLAGS: 00010246 [ 67.785463] RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 [ 67.792774] RDX: 0000000000000000 RSI: 1ffff11037265e01 RDI: ffff8881b932f1a8 [ 67.800058] RBP: ffff8881b932f310 R08: ffff8881bcc84400 R09: ffffed103b5a5b77 [ 67.807339] R10: ffffed103b5a5b77 R11: ffff8881dad2dbbb R12: 0000000000000000 [ 67.814648] R13: 0000000000000001 R14: ffff8881b9e68f40 R15: ffff8881b932f2e8 [ 67.821939] FS: 0000000001e8e880(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000 [ 67.830167] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.836108] CR2: 0000000020000180 CR3: 00000001bec05000 CR4: 00000000001406e0 [ 67.843395] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.850647] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.857937] Kernel panic - not syncing: Fatal exception [ 67.864212] Kernel Offset: disabled [ 67.867833] Rebooting in 86400 seconds..