===================================================== BUG: KMSAN: uninit-value in __io_fill_cqe_req+0x9bd/0xed0 fs/io_uring.c:2482 __io_fill_cqe_req+0x9bd/0xed0 fs/io_uring.c:2482 __io_submit_flush_completions fs/io_uring.c:3160 [inline] io_submit_flush_completions+0x175/0x420 fs/io_uring.c:1575 tctx_task_work+0x1866/0x1ab0 fs/io_uring.c:2972 task_work_run+0x13c/0x280 kernel/task_work.c:177 get_signal+0x152/0x2c50 kernel/signal.c:2634 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_complete_state fs/io_uring.c:2600 [inline] __io_req_complete fs/io_uring.c:2608 [inline] io_recv fs/io_uring.c:6496 [inline] io_issue_sqe+0x163c7/0x19760 fs/io_uring.c:8374 io_queue_sqe fs/io_uring.c:8729 [inline] io_req_task_submit+0x135/0x510 fs/io_uring.c:3064 handle_tw_list fs/io_uring.c:2938 [inline] tctx_task_work+0x1519/0x1ab0 fs/io_uring.c:2967 task_work_run+0x13c/0x280 kernel/task_work.c:177 get_signal+0x152/0x2c50 kernel/signal.c:2634 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.i450 created at: io_recv fs/io_uring.c:6427 [inline] io_issue_sqe+0x4946/0x19760 fs/io_uring.c:8374 io_queue_sqe fs/io_uring.c:8729 [inline] io_req_task_submit+0x135/0x510 fs/io_uring.c:3064 CPU: 0 PID: 19316 Comm: syz-executor.2 Not tainted 5.19.0-syzkaller-32655-g1b070a5d1a2c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 =====================================================