syzbot

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BUG: KCSAN: data-race in __perf_event_overflow / perf_event_exit_event

read to 0xffff88814140143c of 4 bytes by task 14729 on cpu 1:
 perf_event_wakeup kernel/events/core.c:6626 [inline]
 perf_event_exit_event+0x261/0x400 kernel/events/core.c:12984
 perf_event_exit_task_context kernel/events/core.c:13050 [inline]
 perf_event_exit_task+0x3d1/0x520 kernel/events/core.c:13081
 do_exit+0x60f/0x1670 kernel/exit.c:883
 do_group_exit+0x141/0x150 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x1f/0x20 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

write to 0xffff88814140143c of 4 bytes by interrupt on cpu 0:
 __perf_event_overflow+0x7f/0x3e0 kernel/events/core.c:9502
 perf_swevent_hrtimer+0x23d/0x2e0 kernel/events/core.c:10986
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x217/0x700 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x20d/0x7b0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x73/0x210 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x68/0x80 arch/x86/kernel/apic/apic.c:1106
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
 internal_get_user_pages_fast+0x1685/0x21a0
 get_user_pages_fast+0xaf/0x100 mm/gup.c:3063
 get_futex_key+0x145/0xb90 kernel/futex/core.c:261
 futex_wake+0x8c/0x2f0 kernel/futex/waitwake.c:154
 do_futex+0x2bc/0x370 kernel/futex/syscalls.c:111
 mm_release+0xb1/0x1d0 kernel/fork.c:1641
 exit_mm_release+0x25/0x30 kernel/fork.c:1658
 exit_mm+0x37/0x180 kernel/exit.c:539
 do_exit+0x580/0x1670 kernel/exit.c:861
 do_group_exit+0x101/0x150 kernel/exit.c:1024
 get_signal+0xeb7/0xff0 kernel/signal.c:2876
 arch_do_signal_or_restart+0x89/0x2a0 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop+0x6f/0xe0 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0x6c/0xb0 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14718 Comm: syz-executor.1 Not tainted 6.4.0-rc6-syzkaller-00279-g8c1f0c38b310 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
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