syzbot

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BUG: KCSAN: data-race in aio_read_events / iocb_put

write to 0xffff888107aac00c of 4 bytes by task 17436 on cpu 1:
 aio_complete fs/aio.c:1129 [inline]
 iocb_put+0x1e1/0x5b0 fs/aio.c:1163
 io_submit_one+0x83d/0x1350 fs/aio.c:1883
 __do_sys_io_submit fs/aio.c:1939 [inline]
 __se_sys_io_submit+0xf5/0x260 fs/aio.c:1909
 __x64_sys_io_submit+0x3f/0x50 fs/aio.c:1909
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888107aac00c of 4 bytes by task 17414 on cpu 0:
 aio_read_events_ring fs/aio.c:1192 [inline]
 aio_read_events+0xc6/0x470 fs/aio.c:1255
 read_events fs/aio.c:1292 [inline]
 do_io_getevents+0x116/0x360 fs/aio.c:2058
 __do_sys_io_getevents fs/aio.c:2091 [inline]
 __se_sys_io_getevents fs/aio.c:2079 [inline]
 __x64_sys_io_getevents+0xb7/0x170 fs/aio.c:2079
 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 17414 Comm: syz-executor.4 Not tainted 5.13.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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