================================================================== BUG: KCSAN: data-race in exit_signals / prepare_signal read-write to 0xffff8880094f2064 of 4 bytes by task 13125 on cpu 1: exit_signals+0x102/0x530 kernel/signal.c:2846 do_exit+0x15d/0x1630 kernel/exit.c:765 do_group_exit+0xc8/0x170 kernel/exit.c:906 get_signal+0xf9b/0x1510 kernel/signal.c:2758 arch_do_signal+0x25/0x260 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0xde/0x170 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:266 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880094f2064 of 4 bytes by task 8458 on cpu 0: sig_task_ignored kernel/signal.c:94 [inline] sig_ignored kernel/signal.c:119 [inline] prepare_signal+0x872/0xd80 kernel/signal.c:962 __send_signal+0x64/0x780 kernel/signal.c:1082 send_signal+0x39f/0x3d0 kernel/signal.c:1242 do_send_sig_info+0x9b/0xe0 kernel/signal.c:1291 group_send_sig_info kernel/signal.c:1414 [inline] kill_pid_info+0x7f/0x100 kernel/signal.c:1448 kill_proc_info kernel/signal.c:1465 [inline] kill_something_info kernel/signal.c:1562 [inline] __do_sys_kill kernel/signal.c:3664 [inline] __se_sys_kill+0xd3/0x450 kernel/signal.c:3658 __x64_sys_kill+0x2d/0x40 kernel/signal.c:3658 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: 0 PID: 8458 Comm: syz-executor.0 Not tainted 5.10.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================