syzbot

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BUG: KMSAN: uninit-value in cmsghdr_from_user_compat_to_kern+0x568/0x10d0 net/compat.c:154
 cmsghdr_from_user_compat_to_kern+0x568/0x10d0 net/compat.c:154
 ____sys_sendmsg+0x222/0xb60 net/socket.c:2559
 __sys_sendmsg_sock+0x42/0x60 net/socket.c:2663
 io_sendmsg+0x36a/0xe30 io_uring/net.c:552
 io_issue_sqe+0x383/0x22c0 io_uring/io_uring.c:1710
 io_queue_sqe io_uring/io_uring.c:1924 [inline]
 io_submit_sqe io_uring/io_uring.c:2180 [inline]
 io_submit_sqes+0x1259/0x2f20 io_uring/io_uring.c:2295
 __do_sys_io_uring_enter io_uring/io_uring.c:3205 [inline]
 __se_sys_io_uring_enter+0x40c/0x3ca0 io_uring/io_uring.c:3142
 __ia32_sys_io_uring_enter+0x11d/0x1a0 io_uring/io_uring.c:3142
 ia32_sys_call+0x2d8f/0x40d0 arch/x86/include/generated/asm/syscalls_32.h:427
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

Uninit was stored to memory at:
 io_sendmsg+0x691/0xe30 io_uring/net.c:550
 io_issue_sqe+0x383/0x22c0 io_uring/io_uring.c:1710
 io_queue_sqe io_uring/io_uring.c:1924 [inline]
 io_submit_sqe io_uring/io_uring.c:2180 [inline]
 io_submit_sqes+0x1259/0x2f20 io_uring/io_uring.c:2295
 __do_sys_io_uring_enter io_uring/io_uring.c:3205 [inline]
 __se_sys_io_uring_enter+0x40c/0x3ca0 io_uring/io_uring.c:3142
 __ia32_sys_io_uring_enter+0x11d/0x1a0 io_uring/io_uring.c:3142
 ia32_sys_call+0x2d8f/0x40d0 arch/x86/include/generated/asm/syscalls_32.h:427
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

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:2284
 __do_sys_io_uring_enter io_uring/io_uring.c:3205 [inline]
 __se_sys_io_uring_enter+0x40c/0x3ca0 io_uring/io_uring.c:3142
 __ia32_sys_io_uring_enter+0x11d/0x1a0 io_uring/io_uring.c:3142
 ia32_sys_call+0x2d8f/0x40d0 arch/x86/include/generated/asm/syscalls_32.h:427
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0xb0/0x110 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x38/0x80 arch/x86/entry/common.c:411
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:449
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e

CPU: 1 UID: 0 PID: 7959 Comm: syz.3.935 Not tainted 6.10.0-syzkaller-12708-g2f8c4f506285 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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