=====================================================
BUG: KMSAN: uninit-value in tctx_task_work+0x764/0xd50 fs/io_uring.c:2247
 tctx_task_work+0x764/0xd50 fs/io_uring.c:2247
 task_work_run+0x154/0x290 kernel/task_work.c:164
 tracehook_notify_signal include/linux/tracehook.h:214 [inline]
 handle_signal_work kernel/entry/common.c:147 [inline]
 exit_to_user_mode_loop+0x1b5/0x490 kernel/entry/common.c:173
 exit_to_user_mode_prepare kernel/entry/common.c:208 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x7e/0xc0 kernel/entry/common.c:302
 __do_fast_syscall_32+0xa5/0xf0 arch/x86/entry/common.c:183
 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:524 [inline]
 kmem_cache_alloc_bulk+0xec5/0x1560 mm/slub.c:3747
 __io_alloc_req_refill+0x482/0x867 fs/io_uring.c:2015
 io_alloc_req_refill fs/io_uring.c:2041 [inline]
 io_submit_sqes+0x88c/0x1040 fs/io_uring.c:7356
 __do_sys_io_uring_enter fs/io_uring.c:10072 [inline]
 __se_sys_io_uring_enter+0x62f/0x23a0 fs/io_uring.c:10014
 __ia32_sys_io_uring_enter+0x1a0/0x200 fs/io_uring.c:10014
 do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline]
 __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180
 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205
 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

CPU: 0 PID: 6515 Comm: syz-executor.1 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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