From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
---
fs/binfmt_elf.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 439ed81e755a..4a13324aaba1 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1614,6 +1614,7 @@ static int fill_files_note(struct memelfnote *note)
user_long_t *data;
user_long_t *start_end_ofs;
char *name_base, *name_curpos;
+ MA_STATE(mas, &mm->mm_mt, 0, 0);
/* *Estimated* file count and total data size needed */
count = mm->map_count;
@@ -1638,7 +1639,8 @@ static int fill_files_note(struct memelfnote *note)
name_base = name_curpos = ((char *)data) + names_ofs;
remaining = size - names_ofs;
count = 0;
- for (vma = mm->mmap; vma != NULL; vma = vma->vm_next) {
+ rcu_read_lock();
+ mas_for_each(&mas, vma, ULONG_MAX) {
struct file *file;
const char *filename;
@@ -1667,6 +1669,7 @@ static int fill_files_note(struct memelfnote *note)
*start_end_ofs++ = vma->vm_pgoff;
count++;
}
+ rcu_read_unlock();
/* Now we know exact count of files, can store it */
data[0] = count;
--
2.30.2
