Warning: Permanently added '10.128.10.28' (ECDSA) to the list of known hosts. 2020/10/31 19:51:09 fuzzer started 2020/10/31 19:51:09 dialing manager at 10.128.0.105:41313 2020/10/31 19:51:14 syscalls: 211 2020/10/31 19:51:14 code coverage: enabled 2020/10/31 19:51:14 comparison tracing: enabled 2020/10/31 19:51:14 extra coverage: enabled 2020/10/31 19:51:14 setuid sandbox: enabled 2020/10/31 19:51:14 namespace sandbox: enabled 2020/10/31 19:51:14 Android sandbox: /sys/fs/selinux/policy does not exist 2020/10/31 19:51:14 fault injection: enabled 2020/10/31 19:51:14 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2020/10/31 19:51:14 net packet injection: enabled 2020/10/31 19:51:14 net device setup: enabled 2020/10/31 19:51:14 concurrency sanitizer: enabled 2020/10/31 19:51:14 devlink PCI setup: PCI device 0000:00:10.0 is not available 2020/10/31 19:51:14 USB emulation: enabled 2020/10/31 19:51:14 hci packet injection: enabled 2020/10/31 19:51:14 wifi device emulation: enabled 2020/10/31 19:51:19 suppressing KCSAN reports in functions: 'step_into' 'shmem_mknod' 'compact_zone' 'wg_packet_send_staged_packets' 'ext4_ext_try_to_merge_right' 'vfs_readlink' 'ext4_mb_good_group' 'generic_file_buffered_read' 'alloc_pid' 'do_select' 'xas_clear_mark' 'wbt_issue' 'shmem_unlink' 'pcpu_alloc' 'do_sys_poll' '_prb_read_valid' 'exit_mm' 'lru_add_drain_all' 'lookup_fast' '__delayacct_blkio_end' 'drop_nlink' 'ext4_sync_file' 'ext4_mark_iloc_dirty' 'get_signal' 'blk_mq_sched_dispatch_requests' 'ondemand_readahead' '__io_cqring_fill_event' 'shmem_symlink' 'complete_signal' '__mark_inode_dirty' '__delete_from_page_cache' 'ext4_free_inode' 'dd_has_work' 'blk_mq_dispatch_rq_list' '__fsnotify_parent' 'kvm_arch_vcpu_load' '__xa_clear_mark' 'wb_timer_fn' 'generic_write_end' 'wg_packet_decrypt_worker' 'ext4_ext_insert_extent' '__filemap_fdatawrite_range' '__find_get_block' 'snd_rawmidi_poll' 'find_get_pages_range_tag' 'ext4_free_inodes_count' 'tick_nohz_next_event' 'do_nanosleep' 'audit_log_start' 'io_sq_thread' 'expire_timers' '__xa_set_mark' 'ext4_mb_regular_allocator' '__ext4_new_inode' 'kauditd_thread' 'blk_mq_rq_ctx_init' '__ext4_update_other_inode_time' '__add_to_page_cache_locked' 'ext4_writepages' 'n_tty_receive_buf_common' 'tick_sched_timer' 'futex_wait_queue_me' 'handle_irq_event' syzkaller login: [ 39.979532][ T1658] ================================================================== [ 39.987643][ T1658] BUG: KCSAN: data-race in do_madvise / zap_page_range_single [ 39.995100][ T1658] [ 39.997420][ T1658] write to 0xffff888101bbfaf0 of 8 bytes by task 8446 on cpu 0: [ 40.005052][ T1658] do_madvise+0xa80/0x1480 [ 40.009454][ T1658] __x64_sys_madvise+0x5d/0x70 [ 40.014202][ T1658] do_syscall_64+0x39/0x80 [ 40.018609][ T1658] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 40.024475][ T1658] [ 40.026816][ T1658] read to 0xffff888101bbfaf0 of 8 bytes by task 1658 on cpu 1: [ 40.034368][ T1658] zap_page_range_single+0x11e/0x220 [ 40.039643][ T1658] unmap_mapping_pages+0x159/0x1a0 [ 40.044735][ T1658] collapse_file+0xb3e/0x2100 [ 40.049401][ T1658] khugepaged_do_scan+0x1255/0x15b0 [ 40.054579][ T1658] khugepaged+0x75/0x650 [ 40.058808][ T1658] kthread+0x1fa/0x220 [ 40.062861][ T1658] ret_from_fork+0x1f/0x30 [ 40.067253][ T1658] [ 40.069563][ T1658] Reported by Kernel Concurrency Sanitizer on: [ 40.075701][ T1658] CPU: 1 PID: 1658 Comm: khugepaged Not tainted 5.10.0-rc1-syzkaller #0 [ 40.084049][ T1658] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.094088][ T1658] ================================================================== [ 40.102132][ T1658] Kernel panic - not syncing: panic_on_warn set ... [ 40.108721][ T1658] CPU: 1 PID: 1658 Comm: khugepaged Not tainted 5.10.0-rc1-syzkaller #0 [ 40.117021][ T1658] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.127056][ T1658] Call Trace: [ 40.130336][ T1658] dump_stack+0x116/0x15d [ 40.134653][ T1658] panic+0x1e7/0x5fa [ 40.138536][ T1658] ? vprintk_emit+0x2f2/0x370 [ 40.143200][ T1658] kcsan_report+0x67b/0x680 [ 40.147689][ T1658] ? kcsan_setup_watchpoint+0x46a/0x4d0 [ 40.153215][ T1658] ? zap_page_range_single+0x11e/0x220 [ 40.158670][ T1658] ? unmap_mapping_pages+0x159/0x1a0 [ 40.163949][ T1658] ? collapse_file+0xb3e/0x2100 [ 40.168780][ T1658] ? khugepaged_do_scan+0x1255/0x15b0 [ 40.174134][ T1658] ? khugepaged+0x75/0x650 [ 40.178534][ T1658] ? kthread+0x1fa/0x220 [ 40.182764][ T1658] ? ret_from_fork+0x1f/0x30 [ 40.187354][ T1658] ? __list_del_entry_valid+0x54/0xc0 [ 40.192741][ T1658] ? __list_add_valid+0x28/0x90 [ 40.197583][ T1658] kcsan_setup_watchpoint+0x46a/0x4d0 [ 40.202940][ T1658] ? tlb_gather_mmu+0x185/0x1b0 [ 40.207776][ T1658] zap_page_range_single+0x11e/0x220 [ 40.213047][ T1658] ? free_buffer_head+0x180/0x1a0 [ 40.218059][ T1658] ? try_to_free_buffers+0x1c9/0x220 [ 40.223326][ T1658] unmap_mapping_pages+0x159/0x1a0 [ 40.228421][ T1658] collapse_file+0xb3e/0x2100 [ 40.233084][ T1658] ? free_transhuge_page+0x154/0x170 [ 40.238353][ T1658] khugepaged_do_scan+0x1255/0x15b0 [ 40.243537][ T1658] khugepaged+0x75/0x650 [ 40.247779][ T1658] ? init_wait_entry+0x30/0x30 [ 40.252523][ T1658] ? start_stop_khugepaged+0x1a0/0x1a0 [ 40.257977][ T1658] kthread+0x1fa/0x220 [ 40.262029][ T1658] ? start_stop_khugepaged+0x1a0/0x1a0 [ 40.267467][ T1658] ? kthread_blkcg+0x80/0x80 [ 40.272043][ T1658] ret_from_fork+0x1f/0x30 [ 40.276907][ T1658] Kernel Offset: disabled [ 40.281269][ T1658] Rebooting in 86400 seconds..