================================================================== BUG: KCSAN: data-race in complete_signal / do_group_exit write to 0xffff88802f12ed74 of 4 bytes by task 15860 on cpu 0: complete_signal+0x4a7/0x5f0 kernel/signal.c:1045 __send_signal+0x666/0x780 kernel/signal.c:1181 send_signal+0x39f/0x3d0 kernel/signal.c:1242 do_send_sig_info+0x9b/0xe0 kernel/signal.c:1291 send_sig_info kernel/signal.c:1606 [inline] send_sig+0x4f/0x60 kernel/signal.c:1616 pipe_write+0x7d5/0xbc0 fs/pipe.c:470 call_write_iter include/linux/fs.h:1887 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x617/0x690 fs/read_write.c:605 ksys_write+0xce/0x180 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x3e/0x50 fs/read_write.c:667 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88802f12ed74 of 4 bytes by task 15854 on cpu 1: signal_group_exit include/linux/sched/signal.h:268 [inline] do_group_exit+0x50/0x170 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+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 15854 Comm: syz-executor.5 Not tainted 5.10.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================