================================================================== BUG: KCSAN: data-race in complete_signal / do_group_exit write to 0xffff88807dbf8d34 of 4 bytes by task 14515 on cpu 0: complete_signal+0x4a5/0x600 kernel/signal.c:1044 __send_signal+0x680/0x7d0 kernel/signal.c:1180 send_signal+0x398/0x3e0 kernel/signal.c:1241 do_send_sig_info+0x9b/0xe0 kernel/signal.c:1290 send_sig_info kernel/signal.c:1605 [inline] send_sig+0x4f/0x60 kernel/signal.c:1615 pipe_write+0x7d7/0xbc0 fs/pipe.c:489 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:503 [inline] vfs_write+0x608/0x690 fs/read_write.c:578 ksys_write+0xce/0x180 fs/read_write.c:631 __do_sys_write fs/read_write.c:643 [inline] __se_sys_write fs/read_write.c:640 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:640 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88807dbf8d34 of 4 bytes by task 14501 on cpu 1: signal_group_exit include/linux/sched/signal.h:268 [inline] do_group_exit+0x55/0x180 kernel/exit.c:886 __do_sys_exit_group+0xb/0x10 kernel/exit.c:914 __se_sys_exit_group+0x5/0x10 kernel/exit.c:912 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:912 do_syscall_64+0x51/0xb0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 14501 Comm: syz-executor.5 Not tainted 5.8.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================