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BUG: KMSAN: uninit-value in io_fixup_rw_res io_uring/rw.c:289 [inline]
BUG: KMSAN: uninit-value in io_rw_fail+0x1a7/0x1b0 io_uring/rw.c:1067
 io_fixup_rw_res io_uring/rw.c:289 [inline]
 io_rw_fail+0x1a7/0x1b0 io_uring/rw.c:1067
 io_req_defer_failed+0x217/0x3e0 io_uring/io_uring.c:1062
 io_queue_sqe_fallback+0x1f4/0x260 io_uring/io_uring.c:2097
 io_submit_state_end io_uring/io_uring.c:2342 [inline]
 io_submit_sqes+0x2b85/0x2ff0 io_uring/io_uring.c:2460
 __do_sys_io_uring_enter io_uring/io_uring.c:3709 [inline]
 __se_sys_io_uring_enter+0x491/0x43f0 io_uring/io_uring.c:3643
 __x64_sys_io_uring_enter+0x11b/0x1a0 io_uring/io_uring.c:3643
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Uninit was created at:
 slab_post_alloc_hook+0x129/0xa70 mm/slab.h:768
 slab_alloc_node mm/slub.c:3478 [inline]
 __kmem_cache_alloc_node+0x5c9/0x970 mm/slub.c:3517
 __do_kmalloc_node mm/slab_common.c:1006 [inline]
 __kmalloc+0x121/0x3c0 mm/slab_common.c:1020
 kmalloc include/linux/slab.h:604 [inline]
 io_alloc_async_data io_uring/io_uring.c:1777 [inline]
 io_req_prep_async+0x384/0x5a0 io_uring/io_uring.c:1798
 io_queue_sqe_fallback+0x95/0x260 io_uring/io_uring.c:2094
 io_submit_state_end io_uring/io_uring.c:2342 [inline]
 io_submit_sqes+0x2b85/0x2ff0 io_uring/io_uring.c:2460
 __do_sys_io_uring_enter io_uring/io_uring.c:3709 [inline]
 __se_sys_io_uring_enter+0x491/0x43f0 io_uring/io_uring.c:3643
 __x64_sys_io_uring_enter+0x11b/0x1a0 io_uring/io_uring.c:3643
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

CPU: 0 PID: 5465 Comm: syz-executor.0 Not tainted 6.6.0-syzkaller-14614-g77fa2fbe87fc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
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