[info] Using makefile-style concurrent boot in runlevel 2. [ 42.489488][ T26] audit: type=1800 audit(1571763647.176:21): pid=7052 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 42.521757][ T26] audit: type=1800 audit(1571763647.186:22): pid=7052 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="motd" dev="sda1" ino=2480 res=0 [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.15.222' (ECDSA) to the list of known hosts. 2019/10/22 17:00:56 fuzzer started syzkaller login: [ 52.422977][ T7210] as (7210) used greatest stack depth: 10136 bytes left 2019/10/22 17:00:57 dialing manager at 10.128.0.105:33369 2019/10/22 17:00:57 syscalls: 2524 2019/10/22 17:00:57 code coverage: enabled 2019/10/22 17:00:57 comparison tracing: enabled 2019/10/22 17:00:57 extra coverage: extra coverage is not supported by the kernel 2019/10/22 17:00:57 setuid sandbox: enabled 2019/10/22 17:00:57 namespace sandbox: enabled 2019/10/22 17:00:57 Android sandbox: /sys/fs/selinux/policy does not exist 2019/10/22 17:00:57 fault injection: enabled 2019/10/22 17:00:57 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/10/22 17:00:57 net packet injection: enabled 2019/10/22 17:00:57 net device setup: enabled 2019/10/22 17:00:57 concurrency sanitizer: enabled [ 53.358831][ T7214] ================================================================== [ 53.366965][ T7214] BUG: KCSAN: data-race in __nf_conntrack_find_get / __nf_ct_refresh_acct [ 53.375443][ T7214] [ 53.377749][ T7214] read to 0xffff888126b40c08 of 4 bytes by interrupt on cpu 1: [ 53.385269][ T7214] __nf_conntrack_find_get+0x284/0x880 [ 53.390726][ T7214] nf_conntrack_in+0x2ef/0xa80 [ 53.395466][ T7214] ipv4_conntrack_in+0x27/0x40 [ 53.400206][ T7214] nf_hook_slow+0x83/0x160 [ 53.404595][ T7214] ip_rcv+0x12f/0x1a0 [ 53.408552][ T7214] __netif_receive_skb_one_core+0xa7/0xe0 [ 53.414246][ T7214] __netif_receive_skb+0x37/0xf0 [ 53.419176][ T7214] netif_receive_skb_internal+0x59/0x190 [ 53.424783][ T7214] napi_gro_receive+0x28f/0x330 [ 53.429621][ T7214] receive_buf+0x284/0x30b0 [ 53.434098][ T7214] virtnet_poll+0x436/0x7d0 [ 53.438578][ T7214] net_rx_action+0x3ae/0xa90 [ 53.443144][ T7214] __do_softirq+0x115/0x33f [ 53.447621][ T7214] irq_exit+0xbb/0xe0 [ 53.451569][ T7214] [ 53.453876][ T7214] write to 0xffff888126b40c08 of 4 bytes by task 7214 on cpu 0: [ 53.461478][ T7214] __nf_ct_refresh_acct+0xfb/0x1b0 [ 53.466570][ T7214] nf_conntrack_tcp_packet+0xd40/0x3390 [ 53.472100][ T7214] nf_conntrack_in+0x410/0xa80 [ 53.476852][ T7214] ipv4_conntrack_local+0xbe/0x130 [ 53.481941][ T7214] nf_hook_slow+0x83/0x160 [ 53.486330][ T7214] __ip_local_out+0x1f7/0x2b0 [ 53.491016][ T7214] ip_local_out+0x31/0x90 [ 53.495322][ T7214] __ip_queue_xmit+0x3a8/0xa40 [ 53.500068][ T7214] ip_queue_xmit+0x45/0x60 [ 53.504461][ T7214] __tcp_transmit_skb+0xe81/0x1d60 [ 53.509555][ T7214] __tcp_send_ack+0x246/0x300 [ 53.514239][ T7214] tcp_send_ack+0x34/0x40 [ 53.518584][ T7214] tcp_cleanup_rbuf+0x130/0x360 [ 53.523403][ T7214] [ 53.525706][ T7214] Reported by Kernel Concurrency Sanitizer on: [ 53.531855][ T7214] CPU: 0 PID: 7214 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 53.539303][ T7214] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.549348][ T7214] ================================================================== [ 53.557382][ T7214] Kernel panic - not syncing: panic_on_warn set ... [ 53.563967][ T7214] CPU: 0 PID: 7214 Comm: syz-fuzzer Not tainted 5.4.0-rc3+ #0 [ 53.571395][ T7214] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.581421][ T7214] Call Trace: [ 53.584692][ T7214] dump_stack+0xf5/0x159 [ 53.588925][ T7214] panic+0x210/0x640 [ 53.592807][ T7214] ? ip_queue_xmit+0x45/0x60 [ 53.597384][ T7214] ? vprintk_func+0x8d/0x140 [ 53.601952][ T7214] kcsan_report.cold+0xc/0x10 [ 53.606606][ T7214] __kcsan_setup_watchpoint+0x32e/0x4a0 [ 53.612127][ T7214] __tsan_write4+0x32/0x40 [ 53.616520][ T7214] __nf_ct_refresh_acct+0xfb/0x1b0 [ 53.621607][ T7214] nf_conntrack_tcp_packet+0xd40/0x3390 [ 53.627133][ T7214] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 53.632760][ T7214] nf_conntrack_in+0x410/0xa80 [ 53.637524][ T7214] ipv4_conntrack_local+0xbe/0x130 [ 53.642613][ T7214] nf_hook_slow+0x83/0x160 [ 53.647003][ T7214] ? nf_ct_tcp_fixup+0xe0/0xe0 [ 53.651754][ T7214] __ip_local_out+0x1f7/0x2b0 [ 53.656426][ T7214] ? constant_test_bit+0x30/0x30 [ 53.661359][ T7214] ip_local_out+0x31/0x90 [ 53.665664][ T7214] __ip_queue_xmit+0x3a8/0xa40 [ 53.670421][ T7214] ip_queue_xmit+0x45/0x60 [ 53.674925][ T7214] __tcp_transmit_skb+0xe81/0x1d60 [ 53.680028][ T7214] __tcp_send_ack+0x246/0x300 [ 53.684680][ T7214] tcp_send_ack+0x34/0x40 [ 53.688985][ T7214] tcp_cleanup_rbuf+0x130/0x360 [ 53.693914][ T7214] tcp_recvmsg+0x633/0x1a30 [ 53.698398][ T7214] ? __kcsan_setup_watchpoint+0x6b/0x4a0 [ 53.704005][ T7214] inet_recvmsg+0xbb/0x250 [ 53.708394][ T7214] ? __tsan_read8+0x2c/0x30 [ 53.712872][ T7214] ? inet_sendpage+0x100/0x100 [ 53.717610][ T7214] sock_recvmsg+0x92/0xb0 [ 53.721918][ T7214] sock_read_iter+0x15f/0x1e0 [ 53.726595][ T7214] new_sync_read+0x389/0x4f0 [ 53.731167][ T7214] __vfs_read+0xb1/0xc0 [ 53.735301][ T7214] vfs_read+0x143/0x2c0 [ 53.739433][ T7214] ksys_read+0xd5/0x1b0 [ 53.743565][ T7214] __x64_sys_read+0x4c/0x60 [ 53.748045][ T7214] do_syscall_64+0xcc/0x370 [ 53.752528][ T7214] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.758393][ T7214] RIP: 0033:0x47c530 [ 53.762265][ T7214] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 53.781842][ T7214] RSP: 002b:000000c4203c1810 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 53.790240][ T7214] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 53.798200][ T7214] RDX: 0000000000001000 RSI: 000000c4203e0000 RDI: 0000000000000003 [ 53.806147][ T7214] RBP: 000000c4203c1868 R08: 0000000000000000 R09: 0000000000000000 [ 53.814108][ T7214] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000040 [ 53.822057][ T7214] R13: ffffffffffffffff R14: 0000000000000002 R15: ffffffffffffffff [ 53.831301][ T7214] Kernel Offset: disabled [ 53.835618][ T7214] Rebooting in 86400 seconds..