+ mm-hugetlb-change-enospc-to-enomem-in-alloc_hugetlb_folio.patch added to mm-hotfixes-unstable branch

+ mm-hugetlb-change-enospc-to-enomem-in-alloc_hugetlb_folio.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/hugetlb: change ENOSPC to ENOMEM in alloc_hugetlb_folio
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mm-hugetlb-change-enospc-to-enomem-in-alloc_hugetlb_folio.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-hugetlb-change-enospc-to-enomem-in-alloc_hugetlb_folio.patch

This patch will later appear in the mm-hotfixes-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Dafna Hirschfeld <dafna.hirschfeld@intel.com>
Subject: mm/hugetlb: change ENOSPC to ENOMEM in alloc_hugetlb_folio
Date: Sun, 1 Dec 2024 03:03:41 +0200

The error ENOSPC is translated in vmf_error to VM_FAULT_SIGBUS which is
further translated in EFAULT in i.e.  pin/get_user_pages.  But when
running out of pages/hugepages we expect to see ENOMEM and not EFAULT.

Link: https://lkml.kernel.org/r/20241201010341.1382431-1-dafna.hirschfeld@intel.com
Fixes: 8f34af6f93ae ("mm, hugetlb: move the error handle logic out of normal code path")
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@intel.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/hugetlb.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/hugetlb.c~mm-hugetlb-change-enospc-to-enomem-in-alloc_hugetlb_folio
+++ a/mm/hugetlb.c
@@ -3113,7 +3113,7 @@ out_end_reservation:
 	if (!memcg_charge_ret)
 		mem_cgroup_cancel_charge(memcg, nr_pages);
 	mem_cgroup_put(memcg);
-	return ERR_PTR(-ENOSPC);
+	return ERR_PTR(-ENOMEM);
 }
 
 int alloc_bootmem_huge_page(struct hstate *h, int nid)
_

Patches currently in -mm which might be from dafna.hirschfeld@intel.com are

mm-hugetlb-change-enospc-to-enomem-in-alloc_hugetlb_folio.patch