On Tue, Jan 12, 2021 at 11:01:12PM +0100, Christian Brauner wrote:

When determining whether or not to create a coredump the vfs will verify
that the caller is privileged over the inode. Make the would_dump()
helper handle idmapped mounts by passing down the mount's user namespace
of the exec file. If the initial user namespace is passed nothing
changes so non-idmapped mounts will see identical behavior as before.

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>