===================================================== BUG: KMSAN: uninit-value in io_fallback_req_func+0x218/0x5f7 fs/io_uring.c:1399 io_fallback_req_func+0x218/0x5f7 fs/io_uring.c:1399 process_one_work+0xdb6/0x1820 kernel/workqueue.c:2307 worker_thread+0x10b3/0x21e0 kernel/workqueue.c:2454 kthread+0x3c7/0x500 kernel/kthread.c:377 ret_from_fork+0x1f/0x30 Uninit was created at: slab_post_alloc_hook mm/slab.h:737 [inline] kmem_cache_alloc_bulk+0xe98/0x1530 mm/slub.c:3744 __io_alloc_req_refill+0x482/0x867 fs/io_uring.c:2072 io_alloc_req_refill fs/io_uring.c:2098 [inline] io_submit_sqes+0x7d4/0x1a00 fs/io_uring.c:7441 __do_sys_io_uring_enter fs/io_uring.c:10162 [inline] __se_sys_io_uring_enter+0x62f/0x23a0 fs/io_uring.c:10104 __x64_sys_io_uring_enter+0x19d/0x200 fs/io_uring.c:10104 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x44/0xae CPU: 1 PID: 18538 Comm: kworker/1:1 Not tainted 5.17.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/29/2022 Workqueue: events io_fallback_req_func =====================================================