Warning: Permanently added '10.128.0.142' (ECDSA) to the list of known hosts. 2019/11/17 08:43:32 fuzzer started 2019/11/17 08:43:34 dialing manager at 10.128.0.105:33487 2019/11/17 08:43:34 syscalls: 2566 2019/11/17 08:43:34 code coverage: enabled 2019/11/17 08:43:34 comparison tracing: enabled 2019/11/17 08:43:34 extra coverage: extra coverage is not supported by the kernel 2019/11/17 08:43:34 setuid sandbox: enabled 2019/11/17 08:43:34 namespace sandbox: enabled 2019/11/17 08:43:34 Android sandbox: /sys/fs/selinux/policy does not exist 2019/11/17 08:43:34 fault injection: enabled 2019/11/17 08:43:34 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2019/11/17 08:43:34 net packet injection: enabled 2019/11/17 08:43:34 net device setup: enabled 2019/11/17 08:43:34 concurrency sanitizer: enabled 2019/11/17 08:43:34 devlink PCI setup: PCI device 0000:00:10.0 is not available 2019/11/17 08:43:34 adding functions to KCSAN blacklist: 'tomoyo_supervisor' 'ext4_free_inode' 'run_timer_softirq' '__hrtimer_run_queues' 'ep_poll' syzkaller login: [ 56.960453][ T7663] ================================================================== [ 56.968740][ T7663] BUG: KCSAN: data-race in tcp_add_backlog / tcp_recvmsg [ 56.975759][ T7663] [ 56.978099][ T7663] write to 0xffff8881259732f8 of 8 bytes by interrupt on cpu 0: [ 56.985730][ T7663] tcp_add_backlog+0x476/0xce0 [ 56.990480][ T7663] tcp_v4_rcv+0x1a70/0x1bd0 [ 56.994998][ T7663] ip_protocol_deliver_rcu+0x4d/0x420 [ 57.000358][ T7663] ip_local_deliver_finish+0x110/0x140 [ 57.005805][ T7663] ip_local_deliver+0x133/0x210 [ 57.010636][ T7663] ip_rcv_finish+0x121/0x160 [ 57.015287][ T7663] ip_rcv+0x18f/0x1a0 [ 57.019396][ T7663] __netif_receive_skb_one_core+0xa7/0xe0 [ 57.025102][ T7663] __netif_receive_skb+0x37/0xf0 [ 57.030021][ T7663] netif_receive_skb_internal+0x59/0x190 [ 57.035634][ T7663] napi_gro_receive+0x28f/0x330 [ 57.040466][ T7663] receive_buf+0x284/0x30b0 [ 57.045078][ T7663] virtnet_poll+0x436/0x7d0 [ 57.049631][ T7663] net_rx_action+0x3ae/0xa90 [ 57.054277][ T7663] __do_softirq+0x115/0x33f [ 57.058780][ T7663] irq_exit+0xbb/0xe0 [ 57.062786][ T7663] do_IRQ+0x81/0x130 [ 57.066678][ T7663] ret_from_intr+0x0/0x19 [ 57.071000][ T7663] native_safe_halt+0xe/0x10 [ 57.075587][ T7663] arch_cpu_idle+0xa/0x10 [ 57.079900][ T7663] default_idle_call+0x1e/0x40 [ 57.084644][ T7663] do_idle+0x1af/0x280 [ 57.088696][ T7663] cpu_startup_entry+0x1b/0x20 [ 57.093440][ T7663] rest_init+0xec/0xf6 [ 57.097494][ T7663] arch_call_rest_init+0x17/0x37 [ 57.102411][ T7663] start_kernel+0x838/0x85e [ 57.106911][ T7663] x86_64_start_reservations+0x29/0x2b [ 57.112349][ T7663] x86_64_start_kernel+0x72/0x76 [ 57.117266][ T7663] secondary_startup_64+0xa4/0xb0 [ 57.122268][ T7663] [ 57.124593][ T7663] read to 0xffff8881259732f8 of 8 bytes by task 7663 on cpu 1: [ 57.132276][ T7663] tcp_recvmsg+0x46e/0x1b40 [ 57.136778][ T7663] inet_recvmsg+0xbb/0x250 [ 57.141190][ T7663] sock_recvmsg+0x92/0xb0 [ 57.145499][ T7663] sock_read_iter+0x15f/0x1e0 [ 57.151298][ T7663] new_sync_read+0x389/0x4f0 [ 57.155866][ T7663] __vfs_read+0xb1/0xc0 [ 57.160015][ T7663] vfs_read+0x143/0x2c0 [ 57.164148][ T7663] ksys_read+0xd5/0x1b0 [ 57.168280][ T7663] __x64_sys_read+0x4c/0x60 [ 57.172766][ T7663] do_syscall_64+0xcc/0x370 [ 57.177252][ T7663] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.183117][ T7663] [ 57.185557][ T7663] Reported by Kernel Concurrency Sanitizer on: [ 57.191842][ T7663] CPU: 1 PID: 7663 Comm: syz-fuzzer Not tainted 5.4.0-rc7+ #0 [ 57.199279][ T7663] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.209474][ T7663] ================================================================== [ 57.217534][ T7663] Kernel panic - not syncing: panic_on_warn set ... [ 57.224103][ T7663] CPU: 1 PID: 7663 Comm: syz-fuzzer Not tainted 5.4.0-rc7+ #0 [ 57.231548][ T7663] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.242362][ T7663] Call Trace: [ 57.245639][ T7663] dump_stack+0x11d/0x181 [ 57.250020][ T7663] panic+0x210/0x640 [ 57.254108][ T7663] ? vprintk_func+0x8d/0x140 [ 57.258692][ T7663] kcsan_report.cold+0xc/0xd [ 57.263268][ T7663] kcsan_setup_watchpoint+0x3fe/0x460 [ 57.268740][ T7663] __tsan_read8+0xc6/0x100 [ 57.273164][ T7663] tcp_recvmsg+0x46e/0x1b40 [ 57.277683][ T7663] inet_recvmsg+0xbb/0x250 [ 57.282080][ T7663] ? apparmor_socket_recvmsg+0x3b/0x50 [ 57.287542][ T7663] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 57.293778][ T7663] ? security_socket_recvmsg+0x92/0xb0 [ 57.299237][ T7663] ? inet_sendpage+0x100/0x100 [ 57.304069][ T7663] sock_recvmsg+0x92/0xb0 [ 57.308394][ T7663] sock_read_iter+0x15f/0x1e0 [ 57.313942][ T7663] new_sync_read+0x389/0x4f0 [ 57.318516][ T7663] __vfs_read+0xb1/0xc0 [ 57.322783][ T7663] vfs_read+0x143/0x2c0 [ 57.326935][ T7663] ksys_read+0xd5/0x1b0 [ 57.331079][ T7663] __x64_sys_read+0x4c/0x60 [ 57.335572][ T7663] do_syscall_64+0xcc/0x370 [ 57.340059][ T7663] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 57.345945][ T7663] RIP: 0033:0x47c530 [ 57.349843][ T7663] 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 [ 57.369634][ T7663] RSP: 002b:000000c4201497d8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 57.378032][ T7663] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047c530 [ 57.385985][ T7663] RDX: 0000000000001000 RSI: 000000c42035c000 RDI: 0000000000000003 [ 57.393946][ T7663] RBP: 000000c420149830 R08: 0000000000000000 R09: 0000000000000000 [ 57.401911][ T7663] R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000003 [ 57.409868][ T7663] R13: 000000c42007f848 R14: 0000000000000002 R15: ffffffffffffffff [ 57.419237][ T7663] Kernel Offset: disabled [ 57.423577][ T7663] Rebooting in 86400 seconds..