syzbot

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BUG: KCSAN: data-race in io_submit_sqes / io_uring_poll

read-write to 0xffff888108392070 of 4 bytes by task 13756 on cpu 1:
 io_get_sqe fs/io_uring.c:7814 [inline]
 io_submit_sqes+0x1ee/0x7e0 fs/io_uring.c:7858
 __do_sys_io_uring_enter fs/io_uring.c:10810 [inline]
 __se_sys_io_uring_enter+0x2cb/0xc70 fs/io_uring.c:10736
 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:10736
 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

read to 0xffff888108392070 of 4 bytes by task 13741 on cpu 0:
 io_sqring_full fs/io_uring.c:1799 [inline]
 io_uring_poll+0x8d/0x150 fs/io_uring.c:9994
 vfs_poll include/linux/poll.h:88 [inline]
 do_pollfd fs/select.c:873 [inline]
 do_poll fs/select.c:921 [inline]
 do_sys_poll+0x6d5/0xca0 fs/select.c:1015
 __do_sys_ppoll fs/select.c:1121 [inline]
 __se_sys_ppoll+0x195/0x1d0 fs/select.c:1101
 __x64_sys_ppoll+0x63/0x70 fs/select.c:1101
 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: 0x00002acd -> 0x00002ad4

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 13741 Comm: syz-executor.0 Not tainted 5.18.0-rc7-syzkaller-00006-g210e04ff7681-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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