================================================================== BUG: KCSAN: data-race in __send_signal / futex_wait_queue_me write to 0xffff88812abe3064 of 4 bytes by task 8909 on cpu 1: freezer_do_not_count include/linux/freezer.h:109 [inline] freezable_schedule include/linux/freezer.h:171 [inline] futex_wait_queue_me+0x17d/0x290 kernel/futex.c:2631 futex_wait+0x17e/0x3a0 kernel/futex.c:2737 do_futex+0xe2/0x15b0 kernel/futex.c:3808 __do_sys_futex kernel/futex.c:3869 [inline] __se_sys_futex kernel/futex.c:3837 [inline] __x64_sys_futex+0x2dc/0x410 kernel/futex.c:3837 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88812abe3064 of 4 bytes by task 8907 on cpu 0: __send_signal+0x468/0x8a0 kernel/signal.c:1098 send_signal+0x211/0x2a0 kernel/signal.c:1241 do_send_sig_info+0x59/0xc0 kernel/signal.c:1290 do_send_specific+0xd8/0x100 kernel/signal.c:3780 do_tkill+0xf8/0x130 kernel/signal.c:3806 __do_sys_tgkill kernel/signal.c:3825 [inline] __se_sys_tgkill kernel/signal.c:3819 [inline] __x64_sys_tgkill+0x6d/0x90 kernel/signal.c:3819 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8907 Comm: syz-fuzzer Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================