===================================================== BUG: KMSAN: uninit-value in handle_tw_list fs/io_uring.c:2454 [inline] BUG: KMSAN: uninit-value in tctx_task_work+0x129d/0x1c20 fs/io_uring.c:2497 handle_tw_list fs/io_uring.c:2454 [inline] tctx_task_work+0x129d/0x1c20 fs/io_uring.c:2497 task_work_run+0x13c/0x280 kernel/task_work.c:164 get_signal+0x152/0x2c50 kernel/signal.c:2641 arch_do_signal_or_restart+0x56/0xae0 arch/x86/kernel/signal.c:867 exit_to_user_mode_loop+0xea/0x320 kernel/entry/common.c:168 exit_to_user_mode_prepare+0x16e/0x220 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+0xb53/0x1070 mm/slub.c:3746 __io_alloc_req_refill+0x339/0x6b4 fs/io_uring.c:2200 io_alloc_req_refill fs/io_uring.c:2226 [inline] io_submit_sqes+0x6b7/0xd40 fs/io_uring.c:7855 __do_sys_io_uring_enter fs/io_uring.c:10813 [inline] __se_sys_io_uring_enter+0x6f7/0x22f0 fs/io_uring.c:10739 __x64_sys_io_uring_enter+0x117/0x190 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: 1 PID: 18911 Comm: syz-executor.5 Not tainted 5.18.0-syzkaller-16267-g74df87f93710 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================