================================================================== BUG: KCSAN: data-race in __io_fill_cqe_req / io_uring_poll read-write to 0xffff888133cfe250 of 4 bytes by task 11095 on cpu 0: io_get_cqe fs/io_uring.c:2233 [inline] __io_fill_cqe_req+0x242/0x5a0 fs/io_uring.c:2468 __io_req_complete_post fs/io_uring.c:2572 [inline] io_req_complete_post fs/io_uring.c:2582 [inline] io_req_complete_failed+0x2d4/0x3b0 fs/io_uring.c:2615 io_req_task_cancel+0x6a/0x70 fs/io_uring.c:3048 handle_tw_list fs/io_uring.c:2930 [inline] tctx_task_work+0x8d0/0xc10 fs/io_uring.c:2959 task_work_run+0x8e/0x110 kernel/task_work.c:177 get_signal+0xeca/0x1020 kernel/signal.c:2634 arch_do_signal_or_restart+0x87/0x2d0 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0x78/0x130 kernel/entry/common.c:166 exit_to_user_mode_prepare kernel/entry/common.c:201 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:294 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 read to 0xffff888133cfe250 of 4 bytes by task 11082 on cpu 1: __io_cqring_events fs/io_uring.c:2189 [inline] io_cqring_events fs/io_uring.c:3193 [inline] io_uring_poll+0xc5/0x150 fs/io_uring.c:11224 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+0x46/0xb0 value changed: 0x000001bf -> 0x000001ca Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 11082 Comm: syz-executor.5 Not tainted 5.19.0-rc6-syzkaller-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 ==================================================================