commit 1c8e2349f2d0 ("damon/sysfs: fix possible memleak on damon_sysfs_add_target") upstream.
When damon_sysfs_add_target couldn't find proper task,
New allocated damon_target structure isn't registered yet,
So, it's impossible to free new allocated one by damon_sysfs_destroy_targets.
By calling damon_add_target as soon as allocating new target,
Fix this possible memory leak.
Link: https://lkml.kernel.org/r/20220926160611.48536-1-sj@xxxxxxxxxx
Fixes: a61ea561c871 ("mm/damon/sysfs: link DAMON for virtual address spaces monitoring")
Signed-off-by: Levi Yun <ppbuk5246@xxxxxxxxx>
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Reviewed-by: SeongJae Park <sj@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # 5.19.x
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/sysfs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c
index 09f9e8ca3d1f..5b5ee3308d71 100644
--- a/mm/damon/sysfs.c
+++ b/mm/damon/sysfs.c
@@ -2181,13 +2181,13 @@ static int damon_sysfs_add_target(struct damon_sysfs_target *sys_target,
if (!t)
return -ENOMEM;
+ damon_add_target(ctx, t);
if (ctx->ops.id == DAMON_OPS_VADDR ||
ctx->ops.id == DAMON_OPS_FVADDR) {
t->pid = find_get_pid(sys_target->pid);
if (!t->pid)
goto destroy_targets_out;
}
- damon_add_target(ctx, t);
err = damon_sysfs_set_regions(t, sys_target->regions);
if (err)
goto destroy_targets_out;
--
2.35.1
