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BUG: KCSAN: data-race in fasync_remove_entry / kill_fasync

write to 0xffff888099aa5f00 of 8 bytes by task 23202 on cpu 1:
 fasync_remove_entry+0xba/0x120 fs/fcntl.c:882
 fasync_helper+0xcf/0xdc fs/fcntl.c:981
 perf_fasync+0x6c/0xa0 kernel/events/core.c:6011
 __fput+0x46a/0x520 fs/file_table.c:277
 ____fput+0x1f/0x30 fs/file_table.c:313
 task_work_run+0xf6/0x130 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x2b4/0x2c0 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:195 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:278 [inline]
 do_syscall_64+0x384/0x3a0 arch/x86/entry/common.c:304
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888099aa5f00 of 8 bytes by interrupt on cpu 0:
 kill_fasync+0x3f/0x180 fs/fcntl.c:1019
 perf_event_wakeup+0x11f/0x160 kernel/events/core.c:6051
 perf_pending_event+0x12d/0x170 kernel/events/core.c:6107
 irq_work_run_list+0x136/0x190 kernel/irq_work.c:156
 irq_work_run+0x48/0xa0 kernel/irq_work.c:172
 smp_irq_work_interrupt+0x3f/0x100 arch/x86/kernel/irq_work.c:21
 irq_work_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:860
 aa_cred_raw_label security/apparmor/include/cred.h:49 [inline]
 aa_current_raw_label security/apparmor/include/cred.h:89 [inline]
 begin_current_label_crit_section security/apparmor/include/cred.h:162 [inline]
 aa_sk_perm+0x99/0x590 security/apparmor/net.c:171
 aa_sock_msg_perm.isra.0+0x9d/0x140 security/apparmor/lsm.c:938
 apparmor_socket_sendmsg+0x33/0x50 security/apparmor/lsm.c:949
 security_socket_sendmsg+0x6d/0xa0 security/security.c:2045
 sock_sendmsg+0x3b/0xc0 net/socket.c:669
 ____sys_sendmsg+0x212/0x4d0 net/socket.c:2343
 ___sys_sendmsg+0xb5/0x100 net/socket.c:2397
 __sys_sendmmsg+0x123/0x350 net/socket.c:2487
 __do_sys_sendmmsg net/socket.c:2516 [inline]
 __se_sys_sendmmsg net/socket.c:2513 [inline]
 __x64_sys_sendmmsg+0x64/0x80 net/socket.c:2513
 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 23204 Comm: syz-executor.3 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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