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BUG: KCSAN: data-race in aio_read_events / iocb_put

write to 0xffff8881318cd008 of 4 bytes by task 21670 on cpu 0:
 aio_read_events_ring fs/aio.c:1244 [inline]
 aio_read_events+0x35a/0x470 fs/aio.c:1258
 read_events fs/aio.c:1295 [inline]
 do_io_getevents+0x247/0x360 fs/aio.c:2061
 __do_sys_io_getevents fs/aio.c:2094 [inline]
 __se_sys_io_getevents fs/aio.c:2082 [inline]
 __x64_sys_io_getevents+0xb7/0x170 fs/aio.c:2082
 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881318cd008 of 4 bytes by task 21684 on cpu 1:
 aio_complete fs/aio.c:1131 [inline]
 iocb_put+0x1d0/0x5b0 fs/aio.c:1166
 io_submit_one+0x83d/0x1350 fs/aio.c:1886
 __do_sys_io_submit fs/aio.c:1942 [inline]
 __se_sys_io_submit+0xf5/0x260 fs/aio.c:1912
 __x64_sys_io_submit+0x3f/0x50 fs/aio.c:1912
 do_syscall_64+0x34/0x50 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 21684 Comm: syz-executor.5 Tainted: G        W         5.12.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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