================================================================== BUG: KCSAN: data-race in __send_signal / futex_wait_queue_me write to 0xffff888121afb024 of 4 bytes by task 8672 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+0x186/0x250 kernel/futex.c:2634 futex_wait+0x153/0x3a0 kernel/futex.c:2740 do_futex+0x144a/0x21b0 kernel/futex.c:3811 __do_sys_futex kernel/futex.c:3872 [inline] __se_sys_futex+0x26d/0x330 kernel/futex.c:3840 __x64_sys_futex+0x74/0x80 kernel/futex.c:3840 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888121afb024 of 4 bytes by task 8659 on cpu 0: __send_signal+0x26d/0x7d0 kernel/signal.c:1098 send_signal+0x398/0x3e0 kernel/signal.c:1241 do_send_sig_info+0x9b/0xe0 kernel/signal.c:1290 do_send_specific+0xc7/0x100 kernel/signal.c:3780 do_tkill kernel/signal.c:3806 [inline] __do_sys_tgkill kernel/signal.c:3825 [inline] __se_sys_tgkill kernel/signal.c:3819 [inline] __x64_sys_tgkill+0x108/0x140 kernel/signal.c:3819 do_syscall_64+0x71/0x120 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 8659 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================