===================================================== BUG: KMSAN: uninit-value in handle_tw_list fs/io_uring.c:2917 [inline] BUG: KMSAN: uninit-value in tctx_task_work+0x1580/0x1ab0 fs/io_uring.c:2955 handle_tw_list fs/io_uring.c:2917 [inline] tctx_task_work+0x1580/0x1ab0 fs/io_uring.c:2955 task_work_run+0x13c/0x280 kernel/task_work.c:177 get_signal+0x152/0x2c50 kernel/signal.c:2634 arch_do_signal_or_restart+0x56/0xae0 arch/x86/kernel/signal.c:869 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+0x46/0xb0 Uninit was created at: slab_post_alloc_hook mm/slab.h:755 [inline] kmem_cache_alloc_bulk+0xb53/0x1070 mm/slub.c:3743 __io_alloc_req_refill+0x255/0x784 fs/io_uring.c:2665 io_alloc_req_refill fs/io_uring.c:2691 [inline] io_submit_sqes+0x5e8/0xd50 fs/io_uring.c:9071 __do_sys_io_uring_enter fs/io_uring.c:12031 [inline] __se_sys_io_uring_enter+0x670/0x25c0 fs/io_uring.c:11957 __x64_sys_io_uring_enter+0x117/0x190 fs/io_uring.c:11957 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+0x46/0xb0 CPU: 0 PID: 4765 Comm: syz-executor.3 Not tainted 5.19.0-rc3-syzkaller-30868-g4b28366af7d9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================