[merged mm-stable] tools-mm-page_owner_sort-free-per-record-allocations.patch removed from -mm tree

The quilt patch titled
     Subject: tools/mm/page_owner_sort: free per-record allocations
has been removed from the -mm tree.  Its filename was
     tools-mm-page_owner_sort-free-per-record-allocations.patch

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

------------------------------------------------------
From: Yichong Chen <[email protected]>
Subject: tools/mm/page_owner_sort: free per-record allocations
Date: Mon, 29 Jun 2026 09:43:15 +0800

add_list() allocates comm and txt for each page owner record, but the
cleanup path only frees the outer list array.  This leaks both buffers for
every retained record.

Free partial allocations in add_list(), discarded records during culling,
and retained records on exit.

Link: https://lore.kernel.org/[email protected]
Signed-off-by: Yichong Chen <[email protected]>
Reviewed-by: Vishal Moola <[email protected]>
Cc: Ye Liu <[email protected]>
Cc: Zhen Ni <[email protected]>
Cc: Zi Yan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 tools/mm/page_owner_sort.c |   20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

--- a/tools/mm/page_owner_sort.c~tools-mm-page_owner_sort-free-per-record-allocations
+++ a/tools/mm/page_owner_sort.c
@@ -396,6 +396,12 @@ static char *get_comm(char *buf)
 	return comm_str;
 }
 
+static void free_block_list(struct block_list *block)
+{
+	free(block->comm);
+	free(block->txt);
+}
+
 static int get_arg_type(const char *arg)
 {
 	if (!strcmp(arg, "pid") || !strcmp(arg, "p"))
@@ -502,9 +508,14 @@ static bool add_list(char *buf, int len,
 	list[list_size].pid = get_pid(buf);
 	list[list_size].tgid = get_tgid(buf);
 	list[list_size].comm = get_comm(buf);
-	list[list_size].txt = malloc(len+1);
+	if (!list[list_size].comm) {
+		fprintf(stderr, "Out of memory\n");
+		return false;
+	}
+	list[list_size].txt = malloc(len + 1);
 	if (!list[list_size].txt) {
 		fprintf(stderr, "Out of memory\n");
+		free(list[list_size].comm);
 		return false;
 	}
 	memcpy(list[list_size].txt, buf, len);
@@ -863,8 +874,10 @@ int main(int argc, char **argv)
 		} else {
 			list[count-1].num += list[i].num;
 			list[count-1].page_num += list[i].page_num;
+			free_block_list(&list[i]);
 		}
 	}
+	list_size = count;
 
 	qsort(list, count, sizeof(list[0]), compare_sort_condition);
 
@@ -898,8 +911,11 @@ out_free:
 		free(ext_buf);
 	if (buf)
 		free(buf);
-	if (list)
+	if (list) {
+		for (i = 0; i < list_size; i++)
+			free_block_list(&list[i]);
 		free(list);
+	}
 out_ts:
 	regfree(&ts_nsec_pattern);
 out_comm:
_

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

hugetlbfs-release-subpool-on-fill_super-failure.patch
hugetlb-make-hugepage_put_subpool-tolerate-null.patch
hugetlb-evaluate-subpool-free-state-while-locked.patch
fat-release-buffer-head-after-rebuilding-parent.patch