Re: [PATCH] splice: prevent deadlock when splicing a file to itself

[Christoph Hellwig]

On Fri, Mar 20, 2026 at 06:36:15PM +0530, Deepanshu Kartikey wrote:
> Fix this by checking if the input and output files share the
> same inode before proceeding, returning -EINVAL if they do.
> This mirrors the existing check in do_splice() for the
> pipe-to-pipe case where ipipe == opipe.

While restricting splice to be between difference inodes sounds like a
nice simplification, I'm not sure we can add it 20 years after the
syscall was added.