================================================================== BUG: KCSAN: data-race in exit_signals / mm_update_next_owner write to 0xffff8881082910ec of 4 bytes by task 10850 on cpu 1: exit_signals+0xe1/0x4a0 kernel/signal.c:2873 do_exit+0x194/0x1560 kernel/exit.c:781 do_group_exit+0x19b/0x1a0 kernel/exit.c:922 __do_sys_exit_group+0xb/0x10 kernel/exit.c:933 __se_sys_exit_group+0x5/0x10 kernel/exit.c:931 __x64_sys_exit_group+0x16/0x20 kernel/exit.c:931 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881082910ec of 4 bytes by task 10859 on cpu 0: mm_update_next_owner+0x1d9/0x520 kernel/exit.c:388 exit_mm+0x358/0x450 kernel/exit.c:500 do_exit+0x3ff/0x1560 kernel/exit.c:812 do_group_exit+0xce/0x1a0 kernel/exit.c:922 get_signal+0xf83/0x15d0 kernel/signal.c:2781 arch_do_signal_or_restart+0x2a/0x220 arch/x86/kernel/signal.c:789 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x104/0x170 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301 do_syscall_64+0x40/0x50 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 10859 Comm: syz-executor.3 Not tainted 5.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================