Hello, syzbot found the following issue on: HEAD commit: 8ede842f669b Merge tag 'rust-6.9' of https://github.com/Ru.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=138f0ad6180000 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 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15b4a6fa180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14a59799180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/af1cd47b84ef/disk-8ede842f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/be9297712c37/vmlinux-8ede842f.xz kernel image: https://storage.googleapis.com/syzbot-assets/c569fb33468d/bzImage-8ede842f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f8e9a371388aa62ecab4@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== 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+0x3bd/0x610 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:2304 io_submit_sqes+0x19cd/0x2fb0 io_uring/io_uring.c:2480 __do_sys_io_uring_enter io_uring/io_uring.c:3656 [inline] __se_sys_io_uring_enter+0x409/0x43e0 io_uring/io_uring.c:3591 __x64_sys_io_uring_enter+0x11b/0x1a0 io_uring/io_uring.c:3591 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+0xaa1/0x2fb0 io_uring/io_uring.c:2469 __do_sys_io_uring_enter io_uring/io_uring.c:3656 [inline] __se_sys_io_uring_enter+0x409/0x43e0 io_uring/io_uring.c:3591 __x64_sys_io_uring_enter+0x11b/0x1a0 io_uring/io_uring.c:3591 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: 1 PID: 5021 Comm: syz-executor425 Not tainted 6.8.0-syzkaller-00648-g8ede842f669b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
