===================================================== BUG: KMSAN: uninit-value in __io_req_complete fs/io_uring.c:2610 [inline] BUG: KMSAN: uninit-value in io_recvmsg fs/io_uring.c:6420 [inline] BUG: KMSAN: uninit-value in io_issue_sqe+0x179fb/0x19760 fs/io_uring.c:8371 __io_req_complete fs/io_uring.c:2610 [inline] io_recvmsg fs/io_uring.c:6420 [inline] io_issue_sqe+0x179fb/0x19760 fs/io_uring.c:8371 io_wq_submit_work+0x617/0x7e0 fs/io_uring.c:8534 io_worker_handle_work+0xd9f/0x2310 fs/io-wq.c:597 io_wqe_worker+0x3ae/0x1480 fs/io-wq.c:644 ret_from_fork+0x1f/0x30 Uninit was created at: slab_post_alloc_hook mm/slab.h:755 [inline] slab_alloc_node mm/slub.c:3258 [inline] slab_alloc mm/slub.c:3266 [inline] __kmalloc+0x7bd/0x10d0 mm/slub.c:4457 kmalloc include/linux/slab.h:605 [inline] io_alloc_async_data fs/io_uring.c:4126 [inline] io_req_prep_async+0x325/0xe20 fs/io_uring.c:8150 io_queue_sqe_fallback+0xfd/0x250 fs/io_uring.c:8759 io_submit_state_end fs/io_uring.c:9005 [inline] io_submit_sqes+0xa63/0xd50 fs/io_uring.c:9119 __do_sys_io_uring_enter fs/io_uring.c:12051 [inline] __se_sys_io_uring_enter+0x670/0x25c0 fs/io_uring.c:11977 __x64_sys_io_uring_enter+0x117/0x190 fs/io_uring.c:11977 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd CPU: 0 PID: 5175 Comm: iou-wrk-5173 Not tainted 5.19.0-syzkaller-32655-g1b070a5d1a2c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 =====================================================