================================================================== BUG: KCSAN: data-race in __io_fill_cqe_req / io_uring_poll write to 0xffff888108fa8200 of 4 bytes by task 2684 on cpu 0: io_get_cqe fs/io_uring.c:1820 [inline] __io_fill_cqe fs/io_uring.c:2030 [inline] __io_fill_cqe_req+0x129/0x3a0 fs/io_uring.c:2043 __io_req_complete_post+0x65/0x580 fs/io_uring.c:2066 io_req_complete_post fs/io_uring.c:2100 [inline] io_req_complete_failed+0xa1/0x260 fs/io_uring.c:2131 __io_queue_sqe fs/io_uring.c:7524 [inline] io_queue_sqe fs/io_uring.c:7549 [inline] io_submit_sqe+0x3d25/0x4300 fs/io_uring.c:7754 io_submit_sqes+0x25e/0x7e0 fs/io_uring.c:7860 __do_sys_io_uring_enter fs/io_uring.c:10805 [inline] __se_sys_io_uring_enter+0x2cb/0xc70 fs/io_uring.c:10731 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:10731 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 0xffff888108fa8200 of 4 bytes by task 2673 on cpu 1: __io_cqring_events fs/io_uring.c:1804 [inline] io_cqring_events fs/io_uring.c:2725 [inline] io_uring_poll+0xc5/0x150 fs/io_uring.c:10005 vfs_poll include/linux/poll.h:88 [inline] do_select+0x951/0x1020 fs/select.c:538 core_sys_select+0x368/0x520 fs/select.c:681 do_pselect fs/select.c:763 [inline] __do_sys_pselect6+0x1f4/0x250 fs/select.c:804 __se_sys_pselect6 fs/select.c:795 [inline] __x64_sys_pselect6+0x74/0x80 fs/select.c:795 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: 0x00000010 -> 0x00000016 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 2673 Comm: syz-executor.2 Not tainted 5.18.0-rc5-syzkaller-00163-g4b97bac0756a-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================