[merged mm-hotfixes-stable] mm-vmalloc-actually-use-the-in-place-vrealloc-region.patch removed from -mm tree

[merged mm-hotfixes-stable] mm-vmalloc-actually-use-the-in-place-vrealloc-region.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: vmalloc: actually use the in-place vrealloc region
has been removed from the -mm tree.  Its filename was
     mm-vmalloc-actually-use-the-in-place-vrealloc-region.patch

This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Kees Cook <kees@kernel.org>
Subject: mm: vmalloc: actually use the in-place vrealloc region
Date: Thu, 15 May 2025 14:42:15 -0700

Patch series "mm: vmalloc: Actually use the in-place vrealloc region".

This fixes a performance regression[1] with vrealloc()[1].


The refactoring to not build a new vmalloc region only actually worked
when shrinking.  Actually return the resized area when it grows.  Ugh.

Link: https://lkml.kernel.org/r/20250515214217.619685-1-kees@kernel.org
Fixes: a0309faf1cb0 ("mm: vmalloc: support more granular vrealloc() sizing")
Signed-off-by: Kees Cook <kees@kernel.org>
Reported-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Closes: https://lore.kernel.org/all/20250515-bpf-verifier-slowdown-vwo2meju4cgp2su5ckj@6gi6ssxbnfqg [1]
Tested-by: Eduard Zingerman <eddyz87@gmail.com>
Tested-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Tested-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Reviewed-by: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Reviewed-by: Danilo Krummrich <dakr@kernel.org>
Cc: "Erhard F." <erhard_f@mailbox.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmalloc.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/vmalloc.c~mm-vmalloc-actually-use-the-in-place-vrealloc-region
+++ a/mm/vmalloc.c
@@ -4111,6 +4111,7 @@ void *vrealloc_noprof(const void *p, siz
 		if (want_init_on_alloc(flags))
 			memset((void *)p + old_size, 0, size - old_size);
 		vm->requested_size = size;
+		return (void *)p;
 	}
 
 	/* TODO: Grow the vm_area, i.e. allocate and map additional pages. */
_

Patches currently in -mm which might be from kees@kernel.org are