Warning: Permanently added '10.128.1.74' (ECDSA) to the list of known hosts. 2021/03/09 01:31:52 fuzzer started 2021/03/09 01:31:52 dialing manager at 10.128.0.163:46751 2021/03/09 01:31:52 syscalls: 3540 2021/03/09 01:31:52 code coverage: enabled 2021/03/09 01:31:52 comparison tracing: enabled 2021/03/09 01:31:52 extra coverage: enabled 2021/03/09 01:31:52 setuid sandbox: enabled 2021/03/09 01:31:52 namespace sandbox: enabled 2021/03/09 01:31:52 Android sandbox: /sys/fs/selinux/policy does not exist 2021/03/09 01:31:52 fault injection: enabled 2021/03/09 01:31:52 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/03/09 01:31:52 net packet injection: enabled 2021/03/09 01:31:52 net device setup: enabled 2021/03/09 01:31:52 concurrency sanitizer: enabled 2021/03/09 01:31:52 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/03/09 01:31:52 USB emulation: enabled 2021/03/09 01:31:52 hci packet injection: enabled 2021/03/09 01:31:52 wifi device emulation: enabled 2021/03/09 01:31:52 802.15.4 emulation: enabled 2021/03/09 01:31:57 suppressing KCSAN reports in functions: 'ext4_write_end' 'atime_needs_update' 'kauditd_thread' '__delete_from_page_cache' 'shmem_add_to_page_cache' 'do_select' 'xas_find_marked' 'fifo_open' 'isolate_migratepages_block' 'jbd2_journal_dirty_metadata' 'audit_log_start' 'dev_get_tstats64' '__filemap_fdatawrite_range' 'do_signal_stop' 'blk_mq_sched_dispatch_requests' 'wg_packet_decrypt_worker' 'ext4_mark_iloc_dirty' 'ext4_setattr' '__mark_inode_dirty' '_prb_read_valid' 'pcpu_alloc' 'dd_has_work' 'start_this_handle' 'tick_nohz_next_event' 'xas_clear_mark' 'futex_wait_queue_me' 'mm_update_next_owner' '__find_get_block' 'n_tty_receive_char_special' '__ext4_new_inode' 'ext4_free_inode' 'expire_timers' 'filemap_read' 'fib6_clean_node' 'ext4_mb_good_group' '__jbd2_journal_temp_unlink_buffer' 'wbt_issue' 'blk_mq_rq_ctx_init' '__xa_clear_mark' 'tick_sched_timer' 'pcpu_balance_workfn' 'complete_signal' 'prandom_seed' 'get_signal' '__add_to_page_cache_locked' 'blk_mq_request_bypass_insert' 'alloc_pid' 'jbd2_journal_commit_transaction' 'generic_write_end' 'vfs_readlink' 'n_tty_receive_buf_common' 'do_sys_poll' 'blk_mq_dispatch_rq_list' 'ext4_writepages' 'ext4_fc_commit' 2021/03/09 01:31:57 fetching corpus: 0, signal 0/2000 (executing program) 2021/03/09 01:31:57 fetching corpus: 50, signal 15615/19491 (executing program) 2021/03/09 01:31:57 fetching corpus: 100, signal 29732/35351 (executing program) 2021/03/09 01:31:57 fetching corpus: 150, signal 33724/41180 (executing program) 2021/03/09 01:31:57 fetching corpus: 200, signal 36374/45629 (executing program) 2021/03/09 01:31:57 fetching corpus: 250, signal 40295/51333 (executing program) 2021/03/09 01:31:57 fetching corpus: 300, signal 46249/58974 (executing program) 2021/03/09 01:31:57 fetching corpus: 350, signal 50073/64493 (executing program) 2021/03/09 01:31:57 fetching corpus: 400, signal 53757/69860 (executing program) 2021/03/09 01:31:57 fetching corpus: 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fetching corpus: 15850, signal 294590/504123 (executing program) 2021/03/09 01:32:12 fetching corpus: 15900, signal 295048/504124 (executing program) 2021/03/09 01:32:13 fetching corpus: 15950, signal 295495/504143 (executing program) 2021/03/09 01:32:13 fetching corpus: 16000, signal 295835/504143 (executing program) 2021/03/09 01:32:13 fetching corpus: 16050, signal 296072/504145 (executing program) 2021/03/09 01:32:13 fetching corpus: 16100, signal 296733/504152 (executing program) 2021/03/09 01:32:13 fetching corpus: 16150, signal 297504/504153 (executing program) 2021/03/09 01:32:13 fetching corpus: 16200, signal 297875/504155 (executing program) syzkaller login: [ 50.018866][ T8358] ================================================================== [ 50.026975][ T8358] BUG: KCSAN: data-race in do_nanosleep / prepare_signal [ 50.033983][ T8358] [ 50.036286][ T8358] write to 0xffff888105ea002c of 4 bytes by task 8360 on cpu 0: [ 50.043891][ T8358] do_nanosleep+0xff/0x3d0 [ 50.048299][ T8358] __se_sys_nanosleep+0x20b/0x2a0 [ 50.053305][ T8358] __x64_sys_nanosleep+0x2d/0x40 [ 50.058224][ T8358] do_syscall_64+0x39/0x80 [ 50.062626][ T8358] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 50.068502][ T8358] [ 50.070804][ T8358] read to 0xffff888105ea002c of 4 bytes by task 8358 on cpu 1: [ 50.078324][ T8358] prepare_signal+0x872/0xd80 [ 50.082982][ T8358] __send_signal+0x63/0x780 [ 50.087478][ T8358] send_signal+0x398/0x3e0 [ 50.091874][ T8358] do_send_sig_info+0x9b/0xe0 [ 50.096533][ T8358] do_send_specific+0xc7/0x100 [ 50.101276][ T8358] __x64_sys_tgkill+0x108/0x140 [ 50.106124][ T8358] do_syscall_64+0x39/0x80 [ 50.110522][ T8358] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 50.116405][ T8358] [ 50.118834][ T8358] Reported by Kernel Concurrency Sanitizer on: [ 50.124972][ T8358] CPU: 1 PID: 8358 Comm: syz-fuzzer Not tainted 5.12.0-rc2-syzkaller #0 [ 50.133401][ T8358] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.143451][ T8358] ================================================================== [ 50.151492][ T8358] Kernel panic - not syncing: panic_on_warn set ... [ 50.158068][ T8358] CPU: 1 PID: 8358 Comm: syz-fuzzer Not tainted 5.12.0-rc2-syzkaller #0 [ 50.166373][ T8358] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.176408][ T8358] Call Trace: [ 50.179683][ T8358] dump_stack+0x137/0x19d [ 50.183997][ T8358] panic+0x1e7/0x5fa [ 50.187873][ T8358] ? vprintk_emit+0x2fa/0x3e0 [ 50.192532][ T8358] kcsan_report+0x67b/0x680 [ 50.197042][ T8358] ? kcsan_setup_watchpoint+0x40b/0x470 [ 50.202571][ T8358] ? prepare_signal+0x872/0xd80 [ 50.207407][ T8358] ? __send_signal+0x63/0x780 [ 50.212066][ T8358] ? send_signal+0x398/0x3e0 [ 50.216637][ T8358] ? do_send_sig_info+0x9b/0xe0 [ 50.221470][ T8358] ? do_send_specific+0xc7/0x100 [ 50.226385][ T8358] ? __x64_sys_tgkill+0x108/0x140 [ 50.231396][ T8358] ? do_syscall_64+0x39/0x80 [ 50.235974][ T8358] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 50.242028][ T8358] ? __run_hrtimer+0x460/0x460 [ 50.246775][ T8358] ? kcsan_setup_watchpoint+0x26e/0x470 [ 50.252302][ T8358] kcsan_setup_watchpoint+0x40b/0x470 [ 50.257656][ T8358] prepare_signal+0x872/0xd80 [ 50.262316][ T8358] __send_signal+0x63/0x780 [ 50.266820][ T8358] send_signal+0x398/0x3e0 [ 50.271219][ T8358] do_send_sig_info+0x9b/0xe0 [ 50.275878][ T8358] do_send_specific+0xc7/0x100 [ 50.280622][ T8358] __x64_sys_tgkill+0x108/0x140 [ 50.285458][ T8358] do_syscall_64+0x39/0x80 [ 50.289859][ T8358] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 50.295733][ T8358] RIP: 0033:0x46db96 [ 50.299608][ T8358] Code: c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 48 8b 54 24 18 b8 ea 00 00 00 0f 05 cc cc cc cc cc cc cc cc cc 8b 7c 24 08 48 8b 74 24 10 48 8b 54 [ 50.319320][ T8358] RSP: 002b:000000c00003dea0 EFLAGS: 00000246 ORIG_RAX: 00000000000000ea [ 50.327713][ T8358] RAX: ffffffffffffffda RBX: 000000c00009c480 RCX: 000000000046db96 [ 50.335667][ T8358] RDX: 0000000000000017 RSI: 00000000000020a8 RDI: 00000000000020a5 [ 50.343617][ T8358] RBP: 000000c00003dec0 R08: 0000000000013172 R09: 0000000000000010 [ 50.351587][ T8358] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000043b6a0 [ 50.359537][ T8358] R13: 0000000000000000 R14: 000000000093f060 R15: 0000000000000000 [ 50.368328][ T8358] Kernel Offset: disabled [ 50.372645][ T8358] Rebooting in 86400 seconds..