===================================================== BUG: KMSAN: uninit-value in handle_tw_list fs/io_uring.c:2454 [inline] BUG: KMSAN: uninit-value in tctx_task_work+0x1644/0x2020 fs/io_uring.c:2497 handle_tw_list fs/io_uring.c:2454 [inline] tctx_task_work+0x1644/0x2020 fs/io_uring.c:2497 task_work_run+0x154/0x290 kernel/task_work.c:164 get_signal+0x166/0x2d10 kernel/signal.c:2641 arch_do_signal_or_restart+0x6c/0xcf0 arch/x86/kernel/signal.c:867 exit_to_user_mode_loop+0x15c/0x3d0 kernel/entry/common.c:166 exit_to_user_mode_prepare kernel/entry/common.c:201 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x7e/0xc0 kernel/entry/common.c:294 do_syscall_64+0x5d/0xa0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x44/0xae Uninit was created at: slab_post_alloc_hook mm/slab.h:754 [inline] kmem_cache_alloc_bulk+0xe98/0x1530 mm/slub.c:3745 __io_alloc_req_refill+0x482/0x867 fs/io_uring.c:2200 io_alloc_req_refill fs/io_uring.c:2226 [inline] io_submit_sqes+0x98a/0x1a80 fs/io_uring.c:7842 __do_sys_io_uring_enter fs/io_uring.c:10800 [inline] __se_sys_io_uring_enter+0x89c/0x25a0 fs/io_uring.c:10726 __x64_sys_io_uring_enter+0x19d/0x200 fs/io_uring.c:10726 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x51/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x44/0xae CPU: 0 PID: 17719 Comm: syz-executor.2 Not tainted 5.18.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================