Warning: Permanently added '10.128.0.208' (ECDSA) to the list of known hosts.
2021/02/13 02:31:00 fuzzer started
2021/02/13 02:31:01 dialing manager at 10.128.0.163:40369
2021/02/13 02:31:01 syscalls: 3540
2021/02/13 02:31:01 code coverage: enabled
2021/02/13 02:31:01 comparison tracing: enabled
2021/02/13 02:31:01 extra coverage: enabled
2021/02/13 02:31:01 setuid sandbox: enabled
2021/02/13 02:31:01 namespace sandbox: enabled
2021/02/13 02:31:01 Android sandbox: /sys/fs/selinux/policy does not exist
2021/02/13 02:31:01 fault injection: enabled
2021/02/13 02:31:01 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2021/02/13 02:31:01 net packet injection: enabled
2021/02/13 02:31:01 net device setup: enabled
2021/02/13 02:31:01 concurrency sanitizer: enabled
2021/02/13 02:31:01 devlink PCI setup: PCI device 0000:00:10.0 is not available
2021/02/13 02:31:01 USB emulation: enabled
2021/02/13 02:31:01 hci packet injection: enabled
2021/02/13 02:31:01 wifi device emulation: enabled
2021/02/13 02:31:01 802.15.4 emulation: enabled
2021/02/13 02:31:05 suppressing KCSAN reports in functions: '__writeback_single_inode' '__send_signal' 'futex_wait_queue_me' 'tick_nohz_next_event' 'do_signal_stop' 'netlink_getname' 'ext4_sync_file' 'ext4_writepages' '__ext4_new_inode' 'find_get_pages_range_tag' 'jbd2_journal_dirty_metadata' 'expire_timers' 'ext4_mb_good_group' 'wbt_done' 'compaction_alloc' '__filemap_fdatawrite_range' 'ext4_mark_iloc_dirty' 'jbd2_journal_commit_transaction' 'ext4_fc_commit' '__io_cqring_overflow_flush' 'n_tty_receive_buf_common' 'alloc_pid' 'filemap_map_pages' 'blk_mq_sched_dispatch_requests' 'lookup_fast' 'iptunnel_xmit' '__xa_clear_mark' '__add_to_page_cache_locked' 'vfs_fsync_range' 'shmem_unlink' 'dd_has_work' 'blk_mq_dispatch_rq_list' 'blk_mq_do_dispatch_sched' 'jbd2_journal_stop' 'shmem_add_to_page_cache' 'complete_signal' 'exit_mm' 'ext4_mb_regular_allocator' 'xas_find_marked' '__jbd2_journal_file_buffer' 'blk_mq_request_bypass_insert' 'do_nanosleep' '__ext4_update_other_inode_time' 'proc_cgroup_show' 'ext4_setattr' 'ext4_free_inodes_count' 'kauditd_thread' 'ext4_free_inode' 'do_select' 'wbt_wait' 'blk_mq_rq_ctx_init' 'isolate_migratepages_block' 'ext4_handle_inode_extension' '__mark_inode_dirty' 'generic_write_end' 'step_into' '__delete_from_page_cache' 'bpf_lru_pop_free' 'pcpu_alloc' 'do_sys_poll' '_prb_read_valid' 'start_this_handle' 'wbt_issue' 
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syzkaller login: [   42.090547][ T8382] ==================================================================
[   42.098677][ T8382] BUG: KCSAN: data-race in do_epoll_wait / ep_done_scan
[   42.105627][ T8382] 
[   42.107937][ T8382] write to 0xffff888105dd6958 of 8 bytes by task 8381 on cpu 0:
[   42.115547][ T8382]  ep_done_scan+0xab/0x210
[   42.119962][ T8382]  do_epoll_wait+0x91c/0xf00
[   42.124552][ T8382]  __se_sys_epoll_pwait+0xfb/0x210
[   42.129648][ T8382]  __x64_sys_epoll_pwait+0x74/0x80
[   42.134741][ T8382]  do_syscall_64+0x39/0x80
[   42.139140][ T8382]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   42.145012][ T8382] 
[   42.147326][ T8382] read to 0xffff888105dd6958 of 8 bytes by task 8382 on cpu 1:
[   42.154843][ T8382]  do_epoll_wait+0x292/0xf00
[   42.159415][ T8382]  __se_sys_epoll_pwait+0xfb/0x210
[   42.164508][ T8382]  __x64_sys_epoll_pwait+0x74/0x80
[   42.169598][ T8382]  do_syscall_64+0x39/0x80
[   42.174108][ T8382]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   42.179980][ T8382] 
[   42.182278][ T8382] Reported by Kernel Concurrency Sanitizer on:
[   42.188420][ T8382] CPU: 1 PID: 8382 Comm: syz-fuzzer Not tainted 5.11.0-rc7-syzkaller #0
[   42.196730][ T8382] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   42.206760][ T8382] ==================================================================
[   42.214793][ T8382] Kernel panic - not syncing: panic_on_warn set ...
[   42.221348][ T8382] CPU: 1 PID: 8382 Comm: syz-fuzzer Not tainted 5.11.0-rc7-syzkaller #0
[   42.229652][ T8382] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   42.242548][ T8382] Call Trace:
[   42.245808][ T8382]  dump_stack+0x116/0x15d
[   42.250136][ T8382]  panic+0x1e7/0x5fa
[   42.254023][ T8382]  ? vprintk_emit+0x2e2/0x360
[   42.258699][ T8382]  kcsan_report+0x67b/0x680
[   42.263183][ T8382]  ? kcsan_setup_watchpoint+0x472/0x4d0
[   42.268722][ T8382]  ? do_epoll_wait+0x292/0xf00
[   42.273470][ T8382]  ? __se_sys_epoll_pwait+0xfb/0x210
[   42.278738][ T8382]  ? __x64_sys_epoll_pwait+0x74/0x80
[   42.284020][ T8382]  ? do_syscall_64+0x39/0x80
[   42.288592][ T8382]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   42.294644][ T8382]  ? perf_trace_hrtimer_class+0xf0/0x180
[   42.300261][ T8382]  ? tcp_stream_memory_free+0x96/0xb0
[   42.305627][ T8382]  ? __fget_light+0x219/0x260
[   42.310285][ T8382]  kcsan_setup_watchpoint+0x472/0x4d0
[   42.315640][ T8382]  do_epoll_wait+0x292/0xf00
[   42.320223][ T8382]  __se_sys_epoll_pwait+0xfb/0x210
[   42.325330][ T8382]  __x64_sys_epoll_pwait+0x74/0x80
[   42.330422][ T8382]  do_syscall_64+0x39/0x80
[   42.334820][ T8382]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   42.340694][ T8382] RIP: 0033:0x46e380
[   42.345014][ T8382] 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 cc cc cc cc cc cc
[   42.364597][ T8382] RSP: 002b:000000c00003f8b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000119
[   42.373005][ T8382] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000046e380
[   42.380956][ T8382] RDX: 0000000000000080 RSI: 000000c00003f900 RDI: 0000000000000003
[   42.388904][ T8382] RBP: 000000c00003ff00 R08: 0000000000000000 R09: 000000c0008e6620
[   42.396854][ T8382] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000054
[   42.404818][ T8382] R13: 000000c000000900 R14: 0000000000000002 R15: 0000000000000002
[   42.413373][ T8382] Kernel Offset: disabled
[   42.417680][ T8382] Rebooting in 86400 seconds..