Commit 7952f988 authored by Catalin Marinas's avatar Catalin Marinas
Browse files

kmemleak: Annotate false positive in init_section_page_cgroup()

The pointer to the page_cgroup table allocated in
init_section_page_cgroup() is stored in section->page_cgroup as (base -
pfn). Since this value does not point to the beginning or inside the
allocated memory block, kmemleak reports a false positive.

This was reported in as #16297.
Signed-off-by: default avatarCatalin Marinas <>
Reported-by: default avatarAdrien Dessemond <>
Reviewed-by: default avatarKAMEZAWA Hiroyuki <>
Cc: Pekka Enberg <>
Cc: Andrew Morton <>
parent 815c4163
......@@ -9,6 +9,7 @@
#include <linux/vmalloc.h>
#include <linux/cgroup.h>
#include <linux/swapops.h>
#include <linux/kmemleak.h>
static void __meminit
__init_page_cgroup(struct page_cgroup *pc, unsigned long pfn)
......@@ -126,6 +127,12 @@ static int __init_refok init_section_page_cgroup(unsigned long pfn)
if (!base)
base = vmalloc(table_size);
* The value stored in section->page_cgroup is (base - pfn)
* and it does not point to the memory block allocated above,
* causing kmemleak false positives.
} else {
* We don't have to allocate page_cgroup again, but
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