syzbot

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BUG: KCSAN: data-race in __perf_event_overflow / perf_event_exit_event

read to 0xffff888138848f0c of 4 bytes by task 11184 on cpu 0:
 perf_event_wakeup kernel/events/core.c:6409 [inline]
 perf_event_exit_event+0x5da/0x780 kernel/events/core.c:12677
 perf_event_exit_task_context kernel/events/core.c:12743 [inline]
 perf_event_exit_task+0x479/0x600 kernel/events/core.c:12776
 do_exit+0x599/0x1720 kernel/exit.c:804
 do_group_exit+0xa5/0x160 kernel/exit.c:925
 get_signal+0xf54/0x1020 kernel/signal.c:2864
 arch_do_signal_or_restart+0x87/0x2d0 arch/x86/kernel/signal.c:867
 exit_to_user_mode_loop+0x78/0x130 kernel/entry/common.c:166
 exit_to_user_mode_prepare kernel/entry/common.c:201 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:294
 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae

write to 0xffff888138848f0c of 4 bytes by interrupt on cpu 1:
 __perf_event_overflow+0x76/0x1e0 kernel/events/core.c:9188
 perf_swevent_hrtimer+0x255/0x310 kernel/events/core.c:10591
 __run_hrtimer+0x132/0x420 kernel/time/hrtimer.c:1685
 __hrtimer_run_queues kernel/time/hrtimer.c:1749 [inline]
 hrtimer_interrupt+0x36e/0xa70 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0xa3/0x250 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x88/0xb0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20
 unlock_page_memcg+0x0/0x110 mm/memcontrol.c:2098
 page_remove_rmap+0x130/0x220 mm/rmap.c:1413
 zap_pte_range+0x728/0x1430 mm/memory.c:1389
 zap_pmd_range mm/memory.c:1497 [inline]
 zap_pud_range mm/memory.c:1526 [inline]
 zap_p4d_range mm/memory.c:1547 [inline]
 unmap_page_range+0x2dc/0x3d0 mm/memory.c:1568
 unmap_single_vma+0x157/0x210 mm/memory.c:1613
 unmap_vmas+0xd0/0x180 mm/memory.c:1645
 exit_mmap+0x11f/0x380 mm/mmap.c:3140
 __mmput+0x27/0x1b0 kernel/fork.c:1183
 mmput+0x3d/0x50 kernel/fork.c:1205
 exit_mm+0xdb/0x170 kernel/exit.c:510
 do_exit+0x51d/0x1720 kernel/exit.c:782
 __do_sys_exit kernel/exit.c:892 [inline]
 __se_sys_exit kernel/exit.c:890 [inline]
 __x64_sys_exit+0x1b/0x20 kernel/exit.c:890
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 11206 Comm: syz-executor.4 Not tainted 5.18.0-rc4-syzkaller-00424-gb2da7df52e16-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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