Warning: Permanently added '10.128.1.25' (ECDSA) to the list of known hosts. 2021/03/23 09:14:29 fuzzer started 2021/03/23 09:14:29 dialing manager at 10.128.0.163:45945 2021/03/23 09:14:37 syscalls: 3557 2021/03/23 09:14:37 code coverage: enabled 2021/03/23 09:14:37 comparison tracing: enabled 2021/03/23 09:14:37 extra coverage: enabled 2021/03/23 09:14:37 setuid sandbox: enabled 2021/03/23 09:14:37 namespace sandbox: enabled 2021/03/23 09:14:37 Android sandbox: /sys/fs/selinux/policy does not exist 2021/03/23 09:14:37 fault injection: enabled 2021/03/23 09:14:37 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/03/23 09:14:37 net packet injection: enabled 2021/03/23 09:14:37 net device setup: enabled 2021/03/23 09:14:37 concurrency sanitizer: enabled 2021/03/23 09:14:37 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/03/23 09:14:37 USB emulation: enabled 2021/03/23 09:14:37 hci packet injection: enabled 2021/03/23 09:14:37 wifi device emulation: enabled 2021/03/23 09:14:37 802.15.4 emulation: enabled 2021/03/23 09:14:40 suppressing KCSAN reports in functions: 'xas_clear_mark' 'do_sys_poll' 'audit_log_start' 'ext4_da_write_end' 'blk_mq_request_bypass_insert' 'vfs_readlink' 'expire_timers' '__add_to_page_cache_locked' '__filemap_fdatawrite_range' '__xa_clear_mark' 'ext4_free_inode' 'ext4_free_inodes_count' 'kauditd_thread' 'n_tty_receive_buf_common' 'xas_find_marked' '__blk_mq_sched_dispatch_requests' 'alloc_pid' 'ext4_ext_try_to_merge_right' 'filemap_read' 'ext4_mark_iloc_dirty' 'blk_mq_dispatch_rq_list' 'exit_mm' 'dd_has_work' '_prb_read_valid' 'blk_mq_rq_ctx_init' 'delete_from_page_cache_batch' 'pcpu_alloc' 'generic_write_end' 'blk_mq_sched_dispatch_requests' 'wbt_done' '__find_get_block' '__ext4_new_inode' 'do_nanosleep' '__send_signal' 'isolate_migratepages_block' 'ext4_mb_regular_allocator' 'fifo_open' 2021/03/23 09:14:40 fetching corpus: 0, signal 0/2000 (executing program) 2021/03/23 09:14:40 fetching corpus: 42, signal 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================================================================== [ 44.538027][ T8383] BUG: KCSAN: data-race in check_kill_permission / futex_wait_queue_me [ 44.546588][ T8383] [ 44.548917][ T8383] write to 0xffff88810b4c202c of 4 bytes by task 8382 on cpu 0: [ 44.557609][ T8383] futex_wait_queue_me+0x186/0x250 [ 44.563165][ T8383] futex_wait+0x145/0x400 [ 44.567667][ T8383] do_futex+0x1062/0x1cd0 [ 44.572136][ T8383] __se_sys_futex+0x2a8/0x390 [ 44.576816][ T8383] __x64_sys_futex+0x74/0x80 [ 44.581507][ T8383] do_syscall_64+0x39/0x80 [ 44.586092][ T8383] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 44.591990][ T8383] [ 44.594321][ T8383] read to 0xffff88810b4c202c of 4 bytes by task 8383 on cpu 1: [ 44.602301][ T8383] check_kill_permission+0x44/0x2d0 [ 44.607688][ T8383] do_send_specific+0x7f/0x100 [ 44.613016][ T8383] __x64_sys_tgkill+0x108/0x140 [ 44.617975][ T8383] do_syscall_64+0x39/0x80 [ 44.622616][ T8383] entry_SYSCALL_64_after_hwframe+0x44/0xae 2021/03/23 09:14:44 fetching corpus: 1830, signal 161644/214527 (executing program) [ 44.628539][ T8383] [ 44.631072][ T8383] Reported by Kernel Concurrency Sanitizer on: [ 44.637570][ T8383] CPU: 1 PID: 8383 Comm: syz-fuzzer Not tainted 5.12.0-rc4-syzkaller #0 [ 44.646054][ T8383] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.656748][ T8383] ================================================================== 2021/03/23 09:14:44 fetching corpus: 1878, signal 163218/217248 (executing program) 2021/03/23 09:14:44 fetching corpus: 1927, signal 165261/220355 (executing program) 2021/03/23 09:14:44 fetching corpus: 1977, signal 167117/223280 (executing program) 2021/03/23 09:14:44 fetching corpus: 2027, signal 170321/227322 (executing program) 2021/03/23 09:14:44 fetching corpus: 2077, signal 172510/230547 (executing program) 2021/03/23 09:14:44 fetching corpus: 2127, signal 174148/233302 (executing program) 2021/03/23 09:14:44 fetching corpus: 2177, signal 175661/235929 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