[PATCH] maple_tree: Fix potential NULL pointer dereference if mas_pop_node() fails

[Matthew Wilcox]

On Sat, Oct 18, 2025 at 06:38:11PM +0200, Markus Elfring wrote:
> > mas_pop_node() may return NULL when memory allocation fails or when
> > mas->sheaf is invalid. Several callers of mas_pop_node() did not check
> > the return value and directly dereferenced the pointer, which could
> > lead to a NULL pointer dereference and kernel crash.
> 
> Will another imperative wording approach become more helpful for an improved
> change description?
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.18-rc1#n94

Markus, stop this.  You've been told before.