Re: [BUG] WARNING in sendmsg

[Eric Dumazet]

On Mon, Jun 9, 2025 at 6:40 AM Xianying Wang <wangxianying546@xxxxxxxxx> wrote:
>
> Hi,
>
> I discovered a kernel WARNING described as "WARNING in sendmsg"when
> fuzzing the Linux 6.8 kernel using Syzkaller. This issue occurs in the
> memory allocation path within the sendmsg system call, specifically in
> the __alloc_pages function at mm/page_alloc.c:4545. The warning is
> triggered by a WARN_ON_ONCE assertion in the page allocator during an
> attempt to allocate memory via kmalloc from the socket layer.

linux-6.8 is not supported.

Please do not send us syzkaller reports on old versions, always use
the latest trees.