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BUG: KMSAN: uninit-value in handle_tw_list fs/io_uring.c:2454 [inline]
BUG: KMSAN: uninit-value in tctx_task_work+0x1304/0x1ce0 fs/io_uring.c:2497
 handle_tw_list fs/io_uring.c:2454 [inline]
 tctx_task_work+0x1304/0x1ce0 fs/io_uring.c:2497
 task_work_run+0x157/0x290 kernel/task_work.c:164
 get_signal+0x164/0x2d40 kernel/signal.c:2641
 arch_do_signal_or_restart+0x72/0xdd0 arch/x86/kernel/signal.c:867
 exit_to_user_mode_loop+0x146/0x3b0 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0x195/0x240 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+0x44/0xae

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:754 [inline]
 kmem_cache_alloc_bulk+0xf3d/0x1550 mm/slub.c:3745
 __io_alloc_req_refill+0x486/0x882 fs/io_uring.c:2200
 io_alloc_req_refill fs/io_uring.c:2226 [inline]
 io_submit_sqes+0x8de/0x1020 fs/io_uring.c:7855
 __do_sys_io_uring_enter fs/io_uring.c:10813 [inline]
 __se_sys_io_uring_enter+0x887/0x2530 fs/io_uring.c:10739
 __x64_sys_io_uring_enter+0x1a1/0x200 fs/io_uring.c:10739
 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+0x44/0xae

CPU: 0 PID: 4348 Comm: syz-executor.4 Not tainted 5.18.0-syzkaller-16253-g2f3064574275 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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