+ kernel-taskstatsc-parse-fix-buffer-allocation-size.patch added to mm-nonmm-unstable branch

The patch titled
     Subject: kernel/taskstats.c:parse(): fix buffer allocation size
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     kernel-taskstatsc-parse-fix-buffer-allocation-size.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kernel-taskstatsc-parse-fix-buffer-allocation-size.patch

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

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------------------------------------------------------
From: Andrew Morton <[email protected]>
Subject: kernel/taskstats.c:parse(): fix buffer allocation size
Date: Tue Jul 21 04:30:41 PM PDT 2026

parse() is failing to allow for the nla_strscpy()'s null termination of
the cpumask string.  This can result in the cpumask string being
truncated.

This can result in an inappropriate -EINVAL failure or in reporting for an
incorrect span of CPUs.

Fixes: f9fd8914c1ac ("[PATCH] per-task delay accounting taskstats interface: control exit data through cpumasks")
Reported-by: Oleg Deomi <[email protected]>
Closes: https://lore.kernel.org/CAByWkfZ6b1=3H9pwkz-dDQOs9cZaF-HYQ6b9Yb0=Hq2r1Vv_Pw@mail.gmail.com
Cc: Balbir Singh <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 kernel/taskstats.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/taskstats.c~kernel-taskstatsc-parse-fix-buffer-allocation-size
+++ a/kernel/taskstats.c
@@ -368,7 +368,7 @@ static int parse(struct nlattr *na, stru
 		return -E2BIG;
 	if (len < 1)
 		return -EINVAL;
-	data = kmalloc(len, GFP_KERNEL);
+	data = kmalloc(len + 1, GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
 	nla_strscpy(data, na, len);
_

Patches currently in -mm which might be from [email protected] are

mm-mincore-use-walk_page_range_vma-in-do_mincore-fix.patch
csky-implement-flush_cache_vmap-in-c.patch
mm-annotate-data-race-in-cpu_needs_drain-fix.patch
mm-zsmalloc-encode-class-index-in-obj-value-for-lockless-class-lookup-fix.patch
mm-zsmalloc-drop-pool-lock-from-zs_free-on-64-bit-systems-fix.patch
mm-zsmalloc-drop-pool-lock-from-zs_free-on-64-bit-systems-fix-fix.patch
mm-rmap-use-huge_ptep_get-in-try_to_migrate_one-checkpatch-fixes.patch
mm-mprotect-use-huge_ptep_get-for-hugetlb-fix.patch
mm-drop-stale-folio_ref_count==1-check-in-do_swap_page-reuse-logic-fix.patch
alloc_tag-add-ioctl-to-proc-allocinfo-fix.patch
mm-vma-add-and-use-vma__pgoff-fix.patch
drivers-media-v4l2-core-v4l2-vp9c-reduce-inlining.patch
kernel-taskstatsc-parse-fix-buffer-allocation-size.patch