Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KMSAN: uninit-value in io_sendrecv_fail ===================================================== BUG: KMSAN: uninit-value in io_sendrecv_fail+0x91/0x1e0 io_uring/net.c:1334 io_sendrecv_fail+0x91/0x1e0 io_uring/net.c:1334 io_req_defer_failed+0x456/0x6d0 io_uring/io_uring.c:1050 io_queue_sqe_fallback+0x1e3/0x280 io_uring/io_uring.c:2126 io_submit_fail_init+0x4e1/0x790 io_uring/io_uring.c:2310 io_submit_sqes+0x1a60/0x3030 io_uring/io_uring.c:2486 __do_sys_io_uring_enter io_uring/io_uring.c:3662 [inline] __se_sys_io_uring_enter+0x409/0x4390 io_uring/io_uring.c:3597 __x64_sys_io_uring_enter+0x11b/0x1a0 io_uring/io_uring.c:3597 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b Uninit was created at: __alloc_pages+0x9a6/0xe00 mm/page_alloc.c:4592 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2190 [inline] allocate_slab mm/slub.c:2354 [inline] new_slab+0x2d7/0x1400 mm/slub.c:2407 ___slab_alloc+0x16b5/0x3970 mm/slub.c:3540 __kmem_cache_alloc_bulk mm/slub.c:4574 [inline] kmem_cache_alloc_bulk+0x52a/0x1440 mm/slub.c:4648 __io_alloc_req_refill+0x248/0x780 io_uring/io_uring.c:1101 io_alloc_req io_uring/io_uring.h:405 [inline] io_submit_sqes+0xaa2/0x3030 io_uring/io_uring.c:2475 __do_sys_io_uring_enter io_uring/io_uring.c:3662 [inline] __se_sys_io_uring_enter+0x409/0x4390 io_uring/io_uring.c:3597 __x64_sys_io_uring_enter+0x11b/0x1a0 io_uring/io_uring.c:3597 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b CPU: 0 PID: 5478 Comm: syz-executor.0 Not tainted 6.8.0-syzkaller-00721-g3fdefe13e0a9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 ===================================================== Tested on: commit: 3fdefe13 io_uring: explicitly flag early request failure git tree: git://git.kernel.dk/linux.git io_uring-6.9 console output: https://syzkaller.appspot.com/x/log.txt?x=15c58006180000 kernel config: https://syzkaller.appspot.com/x/.config?x=a271c5dca0ff14df dashboard link: https://syzkaller.appspot.com/bug?extid=f8e9a371388aa62ecab4 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.
