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BUG: KCSAN: data-race in event_sched_out / perf_mmap

write to 0xffff88813c43c0d0 of 8 bytes by task 17166 on cpu 1:
 perf_event_update_time kernel/events/core.c:649 [inline]
 perf_mmap+0xc0b/0xe80 kernel/events/core.c:6355
 call_mmap include/linux/fs.h:2091 [inline]
 mmap_region+0xb04/0x10b0 mm/mmap.c:1793
 do_mmap+0x781/0xc20 mm/mmap.c:1582
 vm_mmap_pgoff+0x117/0x1f0 mm/util.c:519
 ksys_mmap_pgoff+0x265/0x320 mm/mmap.c:1630
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88813c43c0d0 of 8 bytes by task 17159 on cpu 0:
 __perf_update_times kernel/events/core.c:632 [inline]
 perf_event_update_time kernel/events/core.c:647 [inline]
 perf_event_set_state kernel/events/core.c:666 [inline]
 event_sched_out+0x2c0/0x830 kernel/events/core.c:2297
 group_sched_out+0xf0/0x1f0 kernel/events/core.c:2323
 ctx_sched_out+0x391/0x450 kernel/events/core.c:3293
 task_ctx_sched_out kernel/events/core.c:2691 [inline]
 perf_event_context_sched_out kernel/events/core.c:3498 [inline]
 __perf_event_task_sched_out+0x679/0xf00 kernel/events/core.c:3601
 perf_event_task_sched_out include/linux/perf_event.h:1245 [inline]
 prepare_task_switch+0x13b/0x140 kernel/sched/core.c:4796
 context_switch kernel/sched/core.c:4938 [inline]
 __schedule+0x397/0x6a0 kernel/sched/core.c:6296
 schedule+0x81/0xb0 kernel/sched/core.c:6369
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0x361/0x5a0 kernel/locking/mutex.c:733
 __mutex_lock_slowpath+0xa/0x10 kernel/locking/mutex.c:1021
 mutex_lock+0x23/0x30 kernel/locking/mutex.c:283
 perf_poll+0xd6/0x130 kernel/events/core.c:5440
 vfs_poll include/linux/poll.h:90 [inline]
 do_select+0x7a5/0xeb0 fs/select.c:538
 core_sys_select+0x440/0x6d0 fs/select.c:681
 do_pselect fs/select.c:763 [inline]
 __do_sys_pselect6+0x1ea/0x250 fs/select.c:804
 __se_sys_pselect6 fs/select.c:795 [inline]
 __x64_sys_pselect6+0x74/0x80 fs/select.c:795
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x000000000000fce1 -> 0x000000000002a63b

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 17159 Comm: syz-executor.2 Not tainted 5.16.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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