mm/page_alloc: Fix try_alloc_pages

JIRA: https://issues.redhat.com/browse/RHEL-78202

commit 2985dae
Author: Alexei Starovoitov <ast@kernel.org>
Date:   Mon Mar 31 20:23:36 2025 -0700

    mm/page_alloc: Fix try_alloc_pages

    Fix an obvious bug. try_alloc_pages() should set_page_refcounted.

    [ Not so obvious: it was probably correct at the time it was written but
      was at some point then rebased on top of v6.14-rc1.

      And at that point there was a semantic conflict with commit
      efabfe1 ("mm/page_alloc: move set_page_refcounted() to callers
      of get_page_from_freelist()") and became buggy.
                                                            - Linus ]

    Fixes: 97769a5 ("mm, bpf: Introduce try_alloc_pages() for opportunistic page allocation")
    Signed-off-by: Alexei Starovoitov <ast@kernel.org>
    Reviewed-by: Shakeel Butt <shakeel.butt@linux.dev>
    Acked-by: Michal Hocko <mhocko@suse.com>
    Acked-by: Vlastimil BAbka <vbabka@suse.cz>
    Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Gregory Bell <grbell@redhat.com>

Author: Gbell26

mm/page_alloc.c

@@ -7224,6 +7224,9 @@ struct page *try_alloc_pages_noprof(int nid, unsigned int order)
 
 	/* Unlike regular alloc_pages() there is no __alloc_pages_slowpath(). */
 
+	if (page)
+		set_page_refcounted(page);
+
 	if (memcg_kmem_online() && page &&
 	    unlikely(__memcg_kmem_charge_page(page, alloc_gfp, order) != 0)) {
 		free_pages_nolock(page, order);