===================================================== BUG: KMSAN: uninit-value in io_req_cqe_overflow+0x1f8/0x220 io_uring/io_uring.c:734 io_req_cqe_overflow+0x1f8/0x220 io_uring/io_uring.c:734 __io_fill_cqe_req+0x911/0xc00 io_uring/io_uring.h:129 __io_submit_flush_completions io_uring/io_uring.c:1352 [inline] io_submit_flush_completions+0x11c/0x390 io_uring/io_uring.c:171 ctx_flush_and_put+0x123/0x300 io_uring/io_uring.c:1015 tctx_task_work+0x1e0/0x420 io_uring/io_uring.c:1099 task_work_run+0x229/0x2c0 kernel/task_work.c:179 get_signal+0x183d/0x2050 kernel/signal.c:2635 arch_do_signal_or_restart+0x56/0xae0 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0xea/0x320 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x16e/0x220 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x23/0x40 kernel/entry/common.c:296 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was stored to memory at: io_req_set_res io_uring/io_uring.h:164 [inline] io_recv_finish io_uring/net.c:596 [inline] io_recv+0x186d/0x1bb0 io_uring/net.c:903 io_issue_sqe+0x3c1/0x11e0 io_uring/io_uring.c:1743 io_queue_sqe io_uring/io_uring.c:1916 [inline] io_req_task_submit+0x139/0x280 io_uring/io_uring.c:1264 io_apoll_task_func+0x123/0x140 io_uring/poll.c:354 handle_tw_list+0x2fa/0x4a0 io_uring/io_uring.c:1042 tctx_task_work+0xea/0x420 io_uring/io_uring.c:1089 task_work_run+0x229/0x2c0 kernel/task_work.c:179 get_signal+0x183d/0x2050 kernel/signal.c:2635 arch_do_signal_or_restart+0x56/0xae0 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0xea/0x320 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x16e/0x220 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x23/0x40 kernel/entry/common.c:296 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Local variable msg created at: io_recv+0x4b/0x1bb0 io_uring/net.c:821 io_issue_sqe+0x3c1/0x11e0 io_uring/io_uring.c:1743 CPU: 1 PID: 4809 Comm: syz-executor.3 Not tainted 6.1.0-syzkaller-64311-g5c6259d6d19f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 =====================================================