=====================================================
BUG: KMSAN: uninit-value in io_fixup_rw_res io_uring/rw.c:311 [inline]
BUG: KMSAN: uninit-value in io_rw_fail+0x1a7/0x1b0 io_uring/rw.c:1099
 io_fixup_rw_res io_uring/rw.c:311 [inline]
 io_rw_fail+0x1a7/0x1b0 io_uring/rw.c:1099
 io_req_defer_failed+0x217/0x3e0 io_uring/io_uring.c:1065
 io_queue_sqe_fallback+0x1f4/0x260 io_uring/io_uring.c:2100
 io_submit_state_end io_uring/io_uring.c:2345 [inline]
 io_submit_sqes+0x2b85/0x2ff0 io_uring/io_uring.c:2463
 __do_sys_io_uring_enter io_uring/io_uring.c:3712 [inline]
 __se_sys_io_uring_enter+0x40c/0x42d0 io_uring/io_uring.c:3647
 __ia32_sys_io_uring_enter+0x119/0x1a0 io_uring/io_uring.c:3647
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb3/0x110 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a

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:1780 [inline]
 io_req_prep_async+0x384/0x5a0 io_uring/io_uring.c:1801
 io_queue_sqe_fallback+0x95/0x260 io_uring/io_uring.c:2097
 io_submit_state_end io_uring/io_uring.c:2345 [inline]
 io_submit_sqes+0x2b85/0x2ff0 io_uring/io_uring.c:2463
 __do_sys_io_uring_enter io_uring/io_uring.c:3712 [inline]
 __se_sys_io_uring_enter+0x40c/0x42d0 io_uring/io_uring.c:3647
 __ia32_sys_io_uring_enter+0x119/0x1a0 io_uring/io_uring.c:3647
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb3/0x110 arch/x86/entry/common.c:321
 do_fast_syscall_32+0x37/0x70 arch/x86/entry/common.c:346
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:384
 entry_SYSENTER_compat_after_hwframe+0x70/0x7a

CPU: 0 PID: 11125 Comm: syz-executor.1 Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
=====================================================