Warning: Permanently added '10.128.0.146' (ECDSA) to the list of known hosts. 2020/07/21 13:50:51 fuzzer started 2020/07/21 13:50:51 dialing manager at 10.128.0.105:36271 2020/07/21 13:50:52 syscalls: 3215 2020/07/21 13:50:52 code coverage: enabled 2020/07/21 13:50:52 comparison tracing: enabled 2020/07/21 13:50:52 extra coverage: enabled 2020/07/21 13:50:52 setuid sandbox: enabled 2020/07/21 13:50:52 namespace sandbox: enabled 2020/07/21 13:50:52 Android sandbox: /sys/fs/selinux/policy does not exist 2020/07/21 13:50:52 fault injection: enabled 2020/07/21 13:50:52 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/07/21 13:50:52 net packet injection: enabled 2020/07/21 13:50:52 net device setup: enabled 2020/07/21 13:50:52 concurrency sanitizer: enabled 2020/07/21 13:50:52 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/07/21 13:50:52 USB emulation: enabled 2020/07/21 13:50:52 suppressing KCSAN reports in functions: 'ext4_mark_iloc_dirty' 'blk_mq_rq_ctx_init' 'generic_write_end' '__xa_clear_mark' 'do_nanosleep' syzkaller login: [ 34.079547][ T8663] ================================================================== [ 34.087652][ T8663] BUG: KCSAN: data-race in do_epoll_wait / ep_poll_callback [ 34.094907][ T8663] [ 34.097226][ T8663] write to 0xffff88812072fd10 of 8 bytes by interrupt on cpu 1: [ 34.104861][ T8663] ep_poll_callback+0x29c/0x510 [ 34.109748][ T8663] __wake_up_common+0xbc/0x130 [ 34.114494][ T8663] __wake_up_sync_key+0x83/0xc0 [ 34.119315][ T8663] sock_def_readable+0x61/0xe0 [ 34.124048][ T8663] tcp_rcv_established+0x13c0/0x1520 [ 34.129306][ T8663] tcp_v4_do_rcv+0x25e/0x480 [ 34.133865][ T8663] tcp_v4_rcv+0x219b/0x2420 [ 34.138339][ T8663] ip_protocol_deliver_rcu+0x1f9/0x400 [ 34.143767][ T8663] ip_local_deliver+0x1d6/0x2a0 [ 34.148587][ T8663] ip_sublist_rcv+0x4d4/0x5a0 [ 34.153232][ T8663] ip_list_rcv+0x262/0x290 [ 34.157631][ T8663] __netif_receive_skb_list_core+0x34b/0x450 [ 34.163579][ T8663] __netif_receive_skb_list+0x298/0x310 [ 34.169106][ T8663] netif_receive_skb_list_internal+0xda/0x330 [ 34.175145][ T8663] napi_gro_receive+0x329/0x5a0 [ 34.179976][ T8663] receive_buf+0x7a4/0xcf0 [ 34.184369][ T8663] virtnet_poll+0x2fa/0x780 [ 34.188852][ T8663] napi_poll+0x178/0x4a0 [ 34.193072][ T8663] net_rx_action+0x1ba/0x530 [ 34.197641][ T8663] __do_softirq+0x198/0x360 [ 34.202129][ T8663] run_ksoftirqd+0x2f/0x60 [ 34.206550][ T8663] smpboot_thread_fn+0x347/0x530 [ 34.211482][ T8663] kthread+0x20d/0x230 [ 34.215533][ T8663] ret_from_fork+0x1f/0x30 [ 34.219925][ T8663] [ 34.222238][ T8663] read to 0xffff88812072fd10 of 8 bytes by task 8663 on cpu 0: [ 34.229766][ T8663] do_epoll_wait+0x2e2/0x870 [ 34.234350][ T8663] __x64_sys_epoll_pwait+0x92/0x150 [ 34.239528][ T8663] do_syscall_64+0x51/0xb0 [ 34.243932][ T8663] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 34.249795][ T8663] [ 34.252102][ T8663] Reported by Kernel Concurrency Sanitizer on: [ 34.258239][ T8663] CPU: 0 PID: 8663 Comm: syz-fuzzer Not tainted 5.8.0-rc6-syzkaller #0 [ 34.266453][ T8663] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.276488][ T8663] ================================================================== [ 34.284534][ T8663] Kernel panic - not syncing: panic_on_warn set ... [ 34.291108][ T8663] CPU: 0 PID: 8663 Comm: syz-fuzzer Not tainted 5.8.0-rc6-syzkaller #0 [ 34.299319][ T8663] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.309354][ T8663] Call Trace: [ 34.312644][ T8663] dump_stack+0x10f/0x19d [ 34.316957][ T8663] panic+0x207/0x64a [ 34.320837][ T8663] ? vprintk_emit+0x44a/0x4f0 [ 34.325499][ T8663] kcsan_report+0x684/0x690 [ 34.330003][ T8663] ? kcsan_setup_watchpoint+0x453/0x4d0 [ 34.335531][ T8663] ? do_epoll_wait+0x2e2/0x870 [ 34.340292][ T8663] ? __x64_sys_epoll_pwait+0x92/0x150 [ 34.345645][ T8663] ? do_syscall_64+0x51/0xb0 [ 34.350218][ T8663] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 34.356278][ T8663] ? ep_send_events_proc+0x4fd/0x620 [ 34.361550][ T8663] kcsan_setup_watchpoint+0x453/0x4d0 [ 34.366907][ T8663] do_epoll_wait+0x2e2/0x870 [ 34.371486][ T8663] ? debug_smp_processor_id+0x18/0x20 [ 34.376845][ T8663] __x64_sys_epoll_pwait+0x92/0x150 [ 34.382025][ T8663] do_syscall_64+0x51/0xb0 [ 34.386426][ T8663] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 34.392309][ T8663] RIP: 0033:0x469240 [ 34.396177][ T8663] Code: Bad RIP value. [ 34.400220][ T8663] RSP: 002b:000000c0006bb7f0 EFLAGS: 00000246 ORIG_RAX: 0000000000000119 [ 34.408612][ T8663] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000469240 [ 34.416564][ T8663] RDX: 0000000000000080 RSI: 000000c0006bb840 RDI: 0000000000000003 [ 34.424532][ T8663] RBP: 000000c0006bbe40 R08: 0000000000000000 R09: 00007ffd463ba080 [ 34.432485][ T8663] R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000003 [ 34.440438][ T8663] R13: 000000c00011ea80 R14: 0000000000000040 R15: 0000000000000008 [ 34.449245][ T8663] Kernel Offset: disabled [ 34.453551][ T8663] Rebooting in 86400 seconds..