Hello, syzbot found the following issue on: HEAD commit: 43fb83c17ba2 Merge tag 'soc-arm-6.13' of git://git.kernel... git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=134feb78580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9f17942989df952c dashboard link: https://syzkaller.appspot.com/bug?extid=9a8500a45c2cabdf9577 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=16f767f7980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12f50ec0580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e1e82262b7ac/disk-43fb83c1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7ca6e1c46dc5/vmlinux-43fb83c1.xz kernel image: https://storage.googleapis.com/syzbot-assets/63aaea837532/bzImage-43fb83c1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9a8500a45c2cabdf9577@xxxxxxxxxxxxxxxxxxxxxxxxx ===================================================== BUG: KMSAN: uninit-value in io_nop+0x549/0x8a0 io_uring/nop.c:55 io_nop+0x549/0x8a0 io_uring/nop.c:55 io_issue_sqe+0x420/0x2130 io_uring/io_uring.c:1712 io_queue_sqe io_uring/io_uring.c:1922 [inline] io_submit_sqe io_uring/io_uring.c:2177 [inline] io_submit_sqes+0x11bc/0x2f80 io_uring/io_uring.c:2294 __do_sys_io_uring_enter io_uring/io_uring.c:3365 [inline] __se_sys_io_uring_enter+0x423/0x4aa0 io_uring/io_uring.c:3300 __x64_sys_io_uring_enter+0x11f/0x1a0 io_uring/io_uring.c:3300 x64_sys_call+0xce5/0x3c30 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+0x9a7/0xe00 mm/page_alloc.c:4774 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2265 alloc_pages_noprof+0x1bf/0x1e0 mm/mempolicy.c:2345 alloc_slab_page mm/slub.c:2412 [inline] allocate_slab+0x320/0x12e0 mm/slub.c:2578 new_slab mm/slub.c:2631 [inline] ___slab_alloc+0x12ef/0x35e0 mm/slub.c:3818 __kmem_cache_alloc_bulk mm/slub.c:4895 [inline] kmem_cache_alloc_bulk_noprof+0x486/0x1330 mm/slub.c:4967 __io_alloc_req_refill+0x84/0x5b0 io_uring/io_uring.c:958 io_alloc_req io_uring/io_uring.h:411 [inline] io_submit_sqes+0x9a2/0x2f80 io_uring/io_uring.c:2283 __do_sys_io_uring_enter io_uring/io_uring.c:3365 [inline] __se_sys_io_uring_enter+0x423/0x4aa0 io_uring/io_uring.c:3300 __x64_sys_io_uring_enter+0x11f/0x1a0 io_uring/io_uring.c:3300 x64_sys_call+0xce5/0x3c30 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: 5798 Comm: syz-executor426 Not tainted 6.12.0-syzkaller-03657-g43fb83c17ba2 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 ===================================================== --- 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
