[info] Using makefile-style concurrent boot in runlevel 2. [ 49.110238][ T26] audit: type=1800 audit(1573806972.253:21): pid=7473 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="bootlogs" dev="sda1" ino=2452 res=0 [ 49.160363][ T26] audit: type=1800 audit(1573806972.253:22): pid=7473 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 '10.128.1.24' (ECDSA) to the list of known hosts. 2019/11/15 08:36:21 fuzzer started 2019/11/15 08:36:22 dialing manager at 10.128.0.105:44219 2019/11/15 08:36:22 syscalls: 2566 2019/11/15 08:36:22 code coverage: enabled 2019/11/15 08:36:22 comparison tracing: enabled 2019/11/15 08:36:22 extra coverage: extra coverage is not supported by the kernel 2019/11/15 08:36:22 setuid sandbox: enabled 2019/11/15 08:36:22 namespace sandbox: enabled 2019/11/15 08:36:22 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/15 08:36:22 fault injection: enabled 2019/11/15 08:36:22 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/15 08:36:22 net packet injection: enabled 2019/11/15 08:36:22 net device setup: enabled 2019/11/15 08:36:22 concurrency sanitizer: enabled 2019/11/15 08:36:22 devlink PCI setup: PCI device 0000:00:10.0 is not available 2019/11/15 08:36:24 adding functions to KCSAN blacklist: 'tick_do_update_jiffies64' 'generic_permission' '__rb_rotate_set_parents' 'pipe_wait' 'rcu_gp_fqs_check_wake' 'find_next_bit' 'add_timer' 'ep_insert' 'tomoyo_supervisor' '__hrtimer_run_queues' 'pid_update_inode' 'timer_clear_idle' 'mod_timer' 'run_timer_softirq' '__rb_insert_augmented' syzkaller login: [ 61.484420][ T7624] ================================================================== [ 61.492562][ T7624] BUG: KCSAN: data-race in tcp_add_backlog / tcp_recvmsg [ 61.499614][ T7624] [ 61.501924][ T7624] write to 0xffff888121031338 of 8 bytes by interrupt on cpu 0: [ 61.509534][ T7624] tcp_add_backlog+0x476/0xce0 [ 61.514296][ T7624] tcp_v4_rcv+0x1a70/0x1bd0 [ 61.518786][ T7624] ip_protocol_deliver_rcu+0x4d/0x420 [ 61.524143][ T7624] ip_local_deliver_finish+0x110/0x140 [ 61.529588][ T7624] ip_local_deliver+0x133/0x210 [ 61.534429][ T7624] ip_rcv_finish+0x121/0x160 [ 61.539014][ T7624] ip_rcv+0x18f/0x1a0 [ 61.542976][ T7624] __netif_receive_skb_one_core+0xa7/0xe0 [ 61.548674][ T7624] __netif_receive_skb+0x37/0xf0 [ 61.553594][ T7624] netif_receive_skb_internal+0x59/0x190 [ 61.559208][ T7624] napi_gro_receive+0x28f/0x330 [ 61.564041][ T7624] receive_buf+0x284/0x30b0 [ 61.568524][ T7624] virtnet_poll+0x436/0x7d0 [ 61.573020][ T7624] net_rx_action+0x3ae/0xa90 [ 61.577665][ T7624] __do_softirq+0x115/0x33f [ 61.582179][ T7624] irq_exit+0xbb/0xe0 [ 61.586148][ T7624] do_IRQ+0x81/0x130 [ 61.590021][ T7624] ret_from_intr+0x0/0x19 [ 61.594333][ T7624] native_safe_halt+0xe/0x10 [ 61.598905][ T7624] arch_cpu_idle+0xa/0x10 [ 61.603213][ T7624] default_idle_call+0x1e/0x40 [ 61.607970][ T7624] do_idle+0x1af/0x280 [ 61.612054][ T7624] cpu_startup_entry+0x1b/0x20 [ 61.616862][ T7624] rest_init+0xec/0xf6 [ 61.620924][ T7624] arch_call_rest_init+0x17/0x37 [ 61.625871][ T7624] start_kernel+0x838/0x85e [ 61.630377][ T7624] x86_64_start_reservations+0x29/0x2b [ 61.635815][ T7624] x86_64_start_kernel+0x72/0x76 [ 61.640733][ T7624] secondary_startup_64+0xa4/0xb0 [ 61.645731][ T7624] [ 61.648048][ T7624] read to 0xffff888121031338 of 8 bytes by task 7624 on cpu 1: [ 61.655576][ T7624] tcp_recvmsg+0x46e/0x1b40 [ 61.660076][ T7624] inet_recvmsg+0xbb/0x250 [ 61.664486][ T7624] sock_recvmsg+0x92/0xb0 [ 61.668800][ T7624] sock_read_iter+0x15f/0x1e0 [ 61.673574][ T7624] new_sync_read+0x389/0x4f0 [ 61.678164][ T7624] __vfs_read+0xb1/0xc0 [ 61.682316][ T7624] vfs_read+0x143/0x2c0 [ 61.686461][ T7624] ksys_read+0xd5/0x1b0 [ 61.690599][ T7624] __x64_sys_read+0x4c/0x60 [ 61.695094][ T7624] do_syscall_64+0xcc/0x370 [ 61.699598][ T7624] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.705488][ T7624] [ 61.707804][ T7624] Reported by Kernel Concurrency Sanitizer on: [ 61.713958][ T7624] CPU: 1 PID: 7624 Comm: syz-fuzzer Not tainted 5.4.0-rc7+ #0 [ 61.721402][ T7624] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.731437][ T7624] ================================================================== [ 61.739494][ T7624] Kernel panic - not syncing: panic_on_warn set ... [ 61.746073][ T7624] CPU: 1 PID: 7624 Comm: syz-fuzzer Not tainted 5.4.0-rc7+ #0 [ 61.753510][ T7624] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.763556][ T7624] Call Trace: [ 61.766835][ T7624] dump_stack+0x11d/0x181 [ 61.771163][ T7624] panic+0x210/0x640 [ 61.775045][ T7624] ? vprintk_func+0x8d/0x140 [ 61.779625][ T7624] kcsan_report.cold+0xc/0xd [ 61.784203][ T7624] kcsan_setup_watchpoint+0x3fe/0x460 [ 61.789562][ T7624] __tsan_read8+0xc6/0x100 [ 61.794310][ T7624] tcp_recvmsg+0x46e/0x1b40 [ 61.798809][ T7624] inet_recvmsg+0xbb/0x250 [ 61.803209][ T7624] ? apparmor_socket_recvmsg+0x3b/0x50 [ 61.808668][ T7624] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 61.814892][ T7624] ? security_socket_recvmsg+0x92/0xb0 [ 61.820337][ T7624] ? inet_sendpage+0x100/0x100 [ 61.825086][ T7624] sock_recvmsg+0x92/0xb0 [ 61.829398][ T7624] sock_read_iter+0x15f/0x1e0 [ 61.834060][ T7624] new_sync_read+0x389/0x4f0 [ 61.838643][ T7624] __vfs_read+0xb1/0xc0 [ 61.842782][ T7624] vfs_read+0x143/0x2c0 [ 61.846923][ T7624] ksys_read+0xd5/0x1b0 [ 61.851067][ T7624] __x64_sys_read+0x4c/0x60 [ 61.855555][ T7624] do_syscall_64+0xcc/0x370 [ 61.860061][ T7624] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.865936][ T7624] RIP: 0033:0x47c530 [ 61.869837][ T7624] 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 [ 61.889424][ T7624] RSP: 002b:000000c4203217d0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 [ 61.897888][ T7624] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 61.905862][ T7624] RDX: 0000000000001000 RSI: 000000c4202e4000 RDI: 0000000000000003 [ 61.913818][ T7624] RBP: 000000c420321828 R08: 0000000000000000 R09: 0000000000000000 [ 61.921774][ T7624] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000020 [ 61.929743][ T7624] R13: ffffffffffffffff R14: 0000000000000004 R15: ffffffffffffffff [ 61.939405][ T7624] Kernel Offset: disabled [ 61.943755][ T7624] Rebooting in 86400 seconds..