Warning: Permanently added '10.128.0.114' (ECDSA) to the list of known hosts. 2020/08/01 18:02:17 fuzzer started 2020/08/01 18:02:17 dialing manager at 10.128.0.105:32803 2020/08/01 18:02:17 syscalls: 3254 2020/08/01 18:02:17 code coverage: enabled 2020/08/01 18:02:17 comparison tracing: enabled 2020/08/01 18:02:17 extra coverage: enabled 2020/08/01 18:02:17 setuid sandbox: enabled 2020/08/01 18:02:17 namespace sandbox: enabled 2020/08/01 18:02:17 Android sandbox: /sys/fs/selinux/policy does not exist 2020/08/01 18:02:17 fault injection: enabled 2020/08/01 18:02:17 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/08/01 18:02:17 net packet injection: enabled 2020/08/01 18:02:17 net device setup: enabled 2020/08/01 18:02:17 concurrency sanitizer: enabled 2020/08/01 18:02:17 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/08/01 18:02:17 USB emulation: enabled 2020/08/01 18:02:17 hci packet injection: enabled 2020/08/01 18:02:18 suppressing KCSAN reports in functions: 'ext4_free_inode' 'snd_rawmidi_poll' 'blk_mq_sched_dispatch_requests' 'do_signal_stop' 'alloc_pid' '__ext4_new_inode' '__xa_clear_mark' 'ext4_sync_file' 'ext4_free_inodes_count' 'complete_signal' 'generic_write_end' 'blk_mq_rq_ctx_init' syzkaller login: [ 32.932878][ T8660] ================================================================== [ 32.941338][ T8660] BUG: KCSAN: data-race in do_epoll_wait / ep_poll_callback [ 32.949155][ T8660] [ 32.951467][ T8660] write to 0xffff888124e48110 of 8 bytes by interrupt on cpu 0: [ 32.960210][ T8660] ep_poll_callback+0x29c/0x510 [ 32.965208][ T8660] __wake_up_common+0xbc/0x130 [ 32.970119][ T8660] __wake_up_sync_key+0x83/0xc0 [ 32.974955][ T8660] sock_def_readable+0x61/0xe0 [ 32.983598][ T8660] tcp_rcv_established+0x13c0/0x1520 [ 32.988855][ T8660] tcp_v4_do_rcv+0x25e/0x480 [ 32.993506][ T8660] tcp_v4_rcv+0x219b/0x2420 [ 32.998158][ T8660] ip_protocol_deliver_rcu+0x1f9/0x400 [ 33.003604][ T8660] ip_local_deliver+0x1d6/0x2a0 [ 33.008526][ T8660] ip_sublist_rcv+0x4d4/0x5a0 [ 33.015552][ T8660] ip_list_rcv+0x262/0x290 [ 33.019943][ T8660] __netif_receive_skb_list_core+0x34b/0x450 [ 33.025994][ T8660] __netif_receive_skb_list+0x298/0x310 [ 33.031779][ T8660] netif_receive_skb_list_internal+0xda/0x330 [ 33.037845][ T8660] napi_gro_receive+0x329/0x5a0 [ 33.042671][ T8660] receive_buf+0x7a4/0xcf0 [ 33.047072][ T8660] virtnet_poll+0x2fa/0x780 [ 33.051564][ T8660] napi_poll+0x178/0x4a0 [ 33.055797][ T8660] net_rx_action+0x1ba/0x530 [ 33.061492][ T8660] __do_softirq+0x198/0x360 [ 33.065971][ T8660] asm_call_on_stack+0xf/0x20 [ 33.070649][ T8660] do_softirq_own_stack+0x5d/0x80 [ 33.077388][ T8660] __irq_exit_rcu+0x115/0x120 [ 33.082038][ T8660] common_interrupt+0x14e/0x1e0 [ 33.086862][ T8660] asm_common_interrupt+0x1e/0x40 [ 33.091862][ T8660] __this_cpu_preempt_check+0x13/0x20 [ 33.097217][ T8660] __local_bh_enable_ip+0x31/0x70 [ 33.102230][ T8660] _raw_spin_unlock_bh+0x33/0x40 [ 33.107231][ T8660] release_sock+0x104/0x110 [ 33.111732][ T8660] tcp_recvmsg+0x16ba/0x1c10 [ 33.116296][ T8660] inet_recvmsg+0xa9/0x210 [ 33.120703][ T8660] sock_read_iter+0x19c/0x1e0 [ 33.125979][ T8660] vfs_read+0x523/0x590 [ 33.130298][ T8660] ksys_read+0xce/0x180 [ 33.134426][ T8660] __x64_sys_read+0x3e/0x50 [ 33.139252][ T8660] do_syscall_64+0x51/0xb0 [ 33.143641][ T8660] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 33.149672][ T8660] [ 33.151994][ T8660] read to 0xffff888124e48110 of 8 bytes by task 8660 on cpu 1: [ 33.159696][ T8660] do_epoll_wait+0x2e2/0x870 [ 33.164259][ T8660] __x64_sys_epoll_pwait+0x92/0x150 [ 33.169531][ T8660] do_syscall_64+0x51/0xb0 [ 33.173923][ T8660] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 33.179868][ T8660] [ 33.182515][ T8660] Reported by Kernel Concurrency Sanitizer on: [ 33.188658][ T8660] CPU: 1 PID: 8660 Comm: syz-fuzzer Not tainted 5.8.0-rc7-syzkaller #0 [ 33.197123][ T8660] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.207166][ T8660] ================================================================== [ 33.215372][ T8660] Kernel panic - not syncing: panic_on_warn set ... [ 33.221931][ T8660] CPU: 1 PID: 8660 Comm: syz-fuzzer Not tainted 5.8.0-rc7-syzkaller #0 [ 33.230137][ T8660] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.240164][ T8660] Call Trace: [ 33.243674][ T8660] dump_stack+0x10f/0x19d [ 33.247977][ T8660] panic+0x207/0x64a [ 33.251882][ T8660] ? vprintk_emit+0x44a/0x4f0 [ 33.256725][ T8660] kcsan_report+0x684/0x690 [ 33.261205][ T8660] ? kcsan_setup_watchpoint+0x453/0x4d0 [ 33.267583][ T8660] ? do_epoll_wait+0x2e2/0x870 [ 33.272321][ T8660] ? __x64_sys_epoll_pwait+0x92/0x150 [ 33.277770][ T8660] ? do_syscall_64+0x51/0xb0 [ 33.282443][ T8660] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 33.288509][ T8660] ? ep_send_events_proc+0x4fd/0x620 [ 33.293946][ T8660] kcsan_setup_watchpoint+0x453/0x4d0 [ 33.299293][ T8660] do_epoll_wait+0x2e2/0x870 [ 33.303873][ T8660] ? debug_smp_processor_id+0x18/0x20 [ 33.309509][ T8660] __x64_sys_epoll_pwait+0x92/0x150 [ 33.314710][ T8660] do_syscall_64+0x51/0xb0 [ 33.319102][ T8660] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 33.324966][ T8660] RIP: 0033:0x469240 [ 33.328839][ T8660] Code: 0f 05 89 44 24 20 c3 cc cc cc 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 44 8b 54 24 1c 49 c7 c0 00 00 00 00 b8 19 01 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc cc cc cc cc cc cc cc 8b 7c 24 08 48 c7 [ 33.348674][ T8660] RSP: 002b:000000c00052d7f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000119 [ 33.357066][ T8660] RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 0000000000469240 [ 33.365011][ T8660] RDX: 0000000000000080 RSI: 000000c00052d840 RDI: 0000000000000003 [ 33.373041][ T8660] RBP: 000000c00052de40 R08: 0000000000000000 R09: 0000000000000000 [ 33.381181][ T8660] R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000003 [ 33.389125][ T8660] R13: 000000c000001c80 R14: 000000000000000f R15: 0000000000000261 [ 33.400892][ T8660] Kernel Offset: disabled [ 33.405203][ T8660] Rebooting in 86400 seconds..