================================================================== BUG: KCSAN: data-race in do_coredump / do_nanosleep write to 0xffff888121a68064 of 4 bytes by task 8726 on cpu 1: freezer_count include/linux/freezer.h:121 [inline] freezable_schedule include/linux/freezer.h:173 [inline] do_nanosleep+0x121/0x3a0 kernel/time/hrtimer.c:1883 hrtimer_nanosleep kernel/time/hrtimer.c:1936 [inline] __do_sys_nanosleep kernel/time/hrtimer.c:1970 [inline] __se_sys_nanosleep+0x20b/0x2a0 kernel/time/hrtimer.c:1957 __x64_sys_nanosleep+0x2d/0x40 kernel/time/hrtimer.c:1957 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888121a68064 of 4 bytes by task 11027 on cpu 0: zap_threads fs/coredump.c:426 [inline] coredump_wait fs/coredump.c:461 [inline] do_coredump+0x3cb/0x1dc0 fs/coredump.c:628 get_signal+0xe55/0x1650 kernel/signal.c:2751 arch_do_signal+0x25/0x270 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0x124/0x210 kernel/entry/common.c:192 syscall_exit_to_user_mode+0x16/0x30 kernel/entry/common.c:267 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 11027 Comm: syz-executor.0 Not tainted 5.9.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================