EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
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BUG: KCSAN: data-race in io_submit_sqes / io_uring_poll

read-write to 0xffff8881452ed870 of 4 bytes by task 5386 on cpu 1:
 io_get_sqe io_uring/io_uring.c:2235 [inline]
 io_submit_sqes+0x23f/0x1080 io_uring/io_uring.c:2286
 __do_sys_io_uring_enter io_uring/io_uring.c:3210 [inline]
 __se_sys_io_uring_enter+0x1c6/0x15a0 io_uring/io_uring.c:3147
 __x64_sys_io_uring_enter+0x78/0x90 io_uring/io_uring.c:3147
 x64_sys_call+0x26d0/0x2e00 arch/x86/include/generated/asm/syscalls_64.h:427
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881452ed870 of 4 bytes by task 5383 on cpu 0:
 io_sqring_full io_uring/io_uring.h:282 [inline]
 io_uring_poll+0xcf/0x190 io_uring/io_uring.c:2701
 vfs_poll include/linux/poll.h:84 [inline]
 __io_arm_poll_handler+0x229/0xf30 io_uring/poll.c:622
 io_arm_poll_handler+0x433/0x5f0 io_uring/poll.c:756
 io_queue_async+0x89/0x370 io_uring/io_uring.c:1902
 io_queue_sqe io_uring/io_uring.c:1931 [inline]
 io_req_task_submit+0xb3/0xc0 io_uring/io_uring.c:1344
 io_handle_tw_list+0x1b9/0x200 io_uring/io_uring.c:1034
 tctx_task_work_run+0x6c/0x1b0 io_uring/io_uring.c:1106
 tctx_task_work+0x40/0x80 io_uring/io_uring.c:1124
 task_work_run+0x13a/0x1a0 kernel/task_work.c:228
 get_signal+0xeee/0x1080 kernel/signal.c:2689
 arch_do_signal_or_restart+0x95/0x4b0 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x59/0x130 kernel/entry/common.c:218
 do_syscall_64+0xd6/0x1c0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000054 -> 0x00000068

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 5383 Comm: syz.1.505 Not tainted 6.11.0-rc1-syzkaller-00154-gc0ecd6388360 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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