===================================================== BUG: KMSAN: uninit-value in io_fixup_rw_res io_uring/rw.c:277 [inline] BUG: KMSAN: uninit-value in io_rw_fail+0x1a7/0x1b0 io_uring/rw.c:997 io_fixup_rw_res io_uring/rw.c:277 [inline] io_rw_fail+0x1a7/0x1b0 io_uring/rw.c:997 io_req_defer_failed+0x217/0x3e0 io_uring/io_uring.c:1051 io_queue_sqe_fallback+0x1f4/0x260 io_uring/io_uring.c:2077 io_submit_state_end io_uring/io_uring.c:2322 [inline] io_submit_sqes+0x2ac6/0x2dc0 io_uring/io_uring.c:2435 __do_sys_io_uring_enter io_uring/io_uring.c:3628 [inline] __se_sys_io_uring_enter+0x49b/0x4250 io_uring/io_uring.c:3562 __x64_sys_io_uring_enter+0x11b/0x1a0 io_uring/io_uring.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Uninit was created at: slab_post_alloc_hook+0x12f/0xb70 mm/slab.h:767 slab_alloc_node mm/slub.c:3470 [inline] __kmem_cache_alloc_node+0x536/0x8d0 mm/slub.c:3509 __do_kmalloc_node mm/slab_common.c:984 [inline] __kmalloc+0x121/0x3c0 mm/slab_common.c:998 kmalloc include/linux/slab.h:586 [inline] io_alloc_async_data io_uring/io_uring.c:1759 [inline] io_req_prep_async+0x384/0x5a0 io_uring/io_uring.c:1780 io_queue_sqe_fallback+0x95/0x260 io_uring/io_uring.c:2074 io_submit_state_end io_uring/io_uring.c:2322 [inline] io_submit_sqes+0x2ac6/0x2dc0 io_uring/io_uring.c:2435 __do_sys_io_uring_enter io_uring/io_uring.c:3628 [inline] __se_sys_io_uring_enter+0x49b/0x4250 io_uring/io_uring.c:3562 __x64_sys_io_uring_enter+0x11b/0x1a0 io_uring/io_uring.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd CPU: 0 PID: 11601 Comm: syz-executor.0 Not tainted 6.5.0-rc7-syzkaller-00104-g4f9e7fabf864 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 =====================================================