================================================================== BUG: KCSAN: data-race in __io_cqring_fill_event / io_uring_poll write to 0xffff88816277aa00 of 4 bytes by task 7550 on cpu 1: io_get_cqe fs/io_uring.c:1695 [inline] __io_cqring_fill_event+0xf9/0x380 fs/io_uring.c:1873 io_req_complete_post+0x4b/0x5d0 fs/io_uring.c:1896 io_submit_sqe+0x7a1/0x47d3 io_submit_sqes+0x25d/0x670 fs/io_uring.c:7369 __do_sys_io_uring_enter fs/io_uring.c:10070 [inline] __se_sys_io_uring_enter+0x212/0xb00 fs/io_uring.c:10012 __x64_sys_io_uring_enter+0x74/0x80 fs/io_uring.c:10012 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88816277aa00 of 4 bytes by task 7549 on cpu 0: __io_cqring_events fs/io_uring.c:1679 [inline] io_cqring_events fs/io_uring.c:2455 [inline] io_uring_poll+0xc6/0x146 fs/io_uring.c:9420 vfs_poll include/linux/poll.h:90 [inline] do_pollfd fs/select.c:869 [inline] do_poll fs/select.c:917 [inline] do_sys_poll+0x4b8/0xad0 fs/select.c:1011 __do_sys_ppoll fs/select.c:1117 [inline] __se_sys_ppoll+0x18b/0x1d0 fs/select.c:1097 __x64_sys_ppoll+0x63/0x70 fs/select.c:1097 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000000 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 7549 Comm: syz-executor.4 Not tainted 5.16.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================