================================================================== BUG: KCSAN: data-race in complete_signal / futex_wait_queue_me write to 0xffff88810620802c of 4 bytes by task 8372 on cpu 0: freezer_do_not_count include/linux/freezer.h:109 [inline] freezable_schedule include/linux/freezer.h:171 [inline] futex_wait_queue_me+0x186/0x250 kernel/futex.c:2606 futex_wait+0x145/0x400 kernel/futex.c:2708 do_futex+0x1062/0x1cd0 kernel/futex.c:3734 __do_sys_futex kernel/futex.c:3797 [inline] __se_sys_futex+0x2a8/0x390 kernel/futex.c:3763 __x64_sys_futex+0x74/0x80 kernel/futex.c:3763 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88810620802c of 4 bytes by task 8381 on cpu 1: wants_signal kernel/signal.c:978 [inline] complete_signal+0x7c/0x600 kernel/signal.c:1001 __send_signal+0x680/0x790 kernel/signal.c:1181 send_signal+0x398/0x3e0 kernel/signal.c:1242 do_send_sig_info+0x9b/0xe0 kernel/signal.c:1291 do_send_specific+0xc7/0x100 kernel/signal.c:3827 do_tkill kernel/signal.c:3853 [inline] __do_sys_tgkill kernel/signal.c:3872 [inline] __se_sys_tgkill kernel/signal.c:3866 [inline] __x64_sys_tgkill+0x108/0x140 kernel/signal.c:3866 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8381 Comm: syz-fuzzer Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================