Warning: Permanently added '10.128.0.9' (ECDSA) to the list of known hosts. 2021/03/28 20:52:43 fuzzer started 2021/03/28 20:52:43 dialing manager at 10.128.0.163:39293 2021/03/28 20:52:45 syscalls: 3557 2021/03/28 20:52:45 code coverage: enabled 2021/03/28 20:52:45 comparison tracing: enabled 2021/03/28 20:52:45 extra coverage: enabled 2021/03/28 20:52:45 setuid sandbox: enabled 2021/03/28 20:52:45 namespace sandbox: enabled 2021/03/28 20:52:45 Android sandbox: /sys/fs/selinux/policy does not exist 2021/03/28 20:52:45 fault injection: enabled 2021/03/28 20:52:45 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/03/28 20:52:45 net packet injection: enabled 2021/03/28 20:52:45 net device setup: enabled 2021/03/28 20:52:45 concurrency sanitizer: enabled 2021/03/28 20:52:45 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/03/28 20:52:45 USB emulation: enabled 2021/03/28 20:52:45 hci packet injection: enabled 2021/03/28 20:52:45 wifi device emulation: enabled 2021/03/28 20:52:45 802.15.4 emulation: enabled 2021/03/28 20:52:47 suppressing KCSAN reports in functions: 'n_tty_receive_char_special' 'expire_timers' 'blk_mq_rq_ctx_init' 'ext4_mb_good_group' 'ext4_mark_iloc_dirty' 'ext4_free_inode' 'pcpu_alloc' 'blk_mq_sched_dispatch_requests' 'xas_clear_mark' 'blk_mq_dispatch_rq_list' 'xas_find_marked' 'shmem_file_read_iter' 'n_tty_receive_buf_common' 'generic_write_end' '__ext4_new_inode' 'dput' 'wbt_done' '__xa_clear_mark' 'alloc_pid' 'ext4_mb_regular_allocator' 'dd_has_work' 'do_nanosleep' 'do_epoll_ctl' '__add_to_page_cache_locked' 2021/03/28 20:52:47 fetching corpus: 0, signal 0/2000 (executing program) 2021/03/28 20:52:47 fetching corpus: 44, signal 17690/21501 (executing program) 2021/03/28 20:52:47 fetching corpus: 94, signal 30655/36169 (executing program) 2021/03/28 20:52:47 fetching corpus: 144, signal 43461/50508 (executing program) 2021/03/28 20:52:47 fetching corpus: 194, signal 51653/60242 (executing program) 2021/03/28 20:52:47 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fetching corpus: 2036, signal 170977/216225 (executing program) 2021/03/28 20:52:50 fetching corpus: 2086, signal 172555/218539 (executing program) 2021/03/28 20:52:50 fetching corpus: 2136, signal 174573/221195 (executing program) 2021/03/28 20:52:50 fetching corpus: 2186, signal 175899/223243 (executing program) 2021/03/28 20:52:50 fetching corpus: 2236, signal 176930/225053 (executing program) 2021/03/28 20:52:51 fetching corpus: 2286, signal 178507/227279 (executing program) 2021/03/28 20:52:51 fetching corpus: 2336, signal 179722/229218 (executing program) 2021/03/28 20:52:51 fetching corpus: 2385, signal 181322/231423 (executing program) 2021/03/28 20:52:51 fetching corpus: 2435, signal 183491/234032 (executing program) 2021/03/28 20:52:51 fetching corpus: 2485, signal 184714/235901 (executing program) syzkaller login: [ 38.409757][ T8347] ================================================================== [ 38.417859][ T8347] BUG: KCSAN: data-race in complete_signal / futex_wait_queue_me [ 38.425556][ T8347] [ 38.427854][ T8347] write to 0xffff88810799c02c of 4 bytes by task 8352 on cpu 0: [ 38.435452][ T8347] futex_wait_queue_me+0x186/0x250 [ 38.440564][ T8347] futex_wait+0x145/0x400 [ 38.444878][ T8347] do_futex+0x1062/0x1cd0 [ 38.449274][ T8347] __se_sys_futex+0x2a8/0x390 [ 38.453929][ T8347] __x64_sys_futex+0x74/0x80 [ 38.458515][ T8347] do_syscall_64+0x39/0x80 [ 38.462909][ T8347] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 38.468779][ T8347] [ 38.471077][ T8347] read to 0xffff88810799c02c of 4 bytes by task 8347 on cpu 1: [ 38.478675][ T8347] complete_signal+0x7c/0x600 [ 38.483330][ T8347] __send_signal+0x680/0x790 [ 38.487896][ T8347] send_signal+0x398/0x3e0 [ 38.492287][ T8347] do_send_sig_info+0x9b/0xe0 [ 38.496938][ T8347] do_send_specific+0xc7/0x100 [ 38.501672][ T8347] __x64_sys_tgkill+0x108/0x140 2021/03/28 20:52:51 fetching corpus: 2534, signal 185824/237679 (executing program) [ 38.506497][ T8347] do_syscall_64+0x39/0x80 [ 38.510887][ T8347] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 38.516753][ T8347] [ 38.519049][ T8347] Reported by Kernel Concurrency Sanitizer on: [ 38.525166][ T8347] CPU: 1 PID: 8347 Comm: syz-fuzzer Not tainted 5.12.0-rc4-syzkaller #0 [ 38.533476][ T8347] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.543516][ T8347] ================================================================== 2021/03/28 20:52:51 fetching corpus: 2583, signal 187382/239798 (executing program) 2021/03/28 20:52:51 fetching corpus: 2633, signal 188752/241759 (executing program) 2021/03/28 20:52:51 fetching corpus: 2683, signal 190512/243963 (executing program) 2021/03/28 20:52:51 fetching corpus: 2733, signal 191749/245833 (executing program) 2021/03/28 20:52:51 fetching corpus: 2783, signal 192670/247477 (executing program) 2021/03/28 20:52:51 fetching corpus: 2833, signal 194294/249550 (executing program) 2021/03/28 20:52:51 fetching corpus: 2882, signal 195338/251226 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