Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KMSAN: uninit-value in io_req_task_work_add_remote ===================================================== BUG: KMSAN: uninit-value in io_req_local_work_add io_uring/io_uring.c:1193 [inline] BUG: KMSAN: uninit-value in io_req_task_work_add_remote+0x592/0x5e0 io_uring/io_uring.c:1241 io_req_local_work_add io_uring/io_uring.c:1193 [inline] io_req_task_work_add_remote+0x592/0x5e0 io_uring/io_uring.c:1241 io_msg_remote_post io_uring/msg_ring.c:102 [inline] io_msg_data_remote io_uring/msg_ring.c:133 [inline] io_msg_ring_data io_uring/msg_ring.c:152 [inline] io_msg_ring+0x1c38/0x1ef0 io_uring/msg_ring.c:305 io_issue_sqe+0x383/0x22c0 io_uring/io_uring.c:1711 io_queue_sqe io_uring/io_uring.c:1925 [inline] io_submit_sqe io_uring/io_uring.c:2181 [inline] io_submit_sqes+0x1259/0x2f20 io_uring/io_uring.c:2296 __do_sys_io_uring_enter io_uring/io_uring.c:3206 [inline] __se_sys_io_uring_enter+0x40c/0x3ca0 io_uring/io_uring.c:3143 __x64_sys_io_uring_enter+0x11f/0x1a0 io_uring/io_uring.c:3143 x64_sys_call+0x2d82/0x3c10 arch/x86/include/generated/asm/syscalls_64.h:427 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: __alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4719 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page mm/slub.c:2321 [inline] allocate_slab+0x203/0x1220 mm/slub.c:2484 new_slab mm/slub.c:2537 [inline] ___slab_alloc+0x12ef/0x35e0 mm/slub.c:3723 __kmem_cache_alloc_bulk mm/slub.c:4759 [inline] kmem_cache_alloc_bulk_noprof+0x486/0x1330 mm/slub.c:4831 __io_alloc_req_refill+0x84/0x560 io_uring/io_uring.c:940 io_alloc_req io_uring/io_uring.h:393 [inline] io_submit_sqes+0x171b/0x2f20 io_uring/io_uring.c:2285 __do_sys_io_uring_enter io_uring/io_uring.c:3206 [inline] __se_sys_io_uring_enter+0x40c/0x3ca0 io_uring/io_uring.c:3143 __x64_sys_io_uring_enter+0x11f/0x1a0 io_uring/io_uring.c:3143 x64_sys_call+0x2d82/0x3c10 arch/x86/include/generated/asm/syscalls_64.h:427 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 5924 Comm: syz.0.16 Not tainted 6.10.0-syzkaller-12268-g7a3fad30fd8b-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 ===================================================== Tested on: commit: 7a3fad30 Merge tag 'random-6.11-rc1-for-linus' of git:.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13a6fa19980000 kernel config: https://syzkaller.appspot.com/x/.config?x=f26f43c6f7db5ad2 dashboard link: https://syzkaller.appspot.com/bug?extid=82609b8937a4458106ca compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=178ca779980000
