From: Yu Kuai yukuai3@huawei.com
[ Upstream commit c9ac2acde53f5385de185bccf6aaa91cf9ac1541 ]
In the error path of raid10_run(), 'conf' need be freed, however, 'conf->bio_split' is missed and memory will be leaked.
Since there are 3 places to free 'conf', factor out a helper to fix the problem.
Fixes: fc9977dd069e ("md/raid10: simplify the splitting of requests.") Signed-off-by: Yu Kuai yukuai3@huawei.com Signed-off-by: Song Liu song@kernel.org Link: https://lore.kernel.org/r/20230310073855.1337560-6-yukuai1@huaweicloud.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/md/raid10.c | 37 +++++++++++++++++-------------------- 1 file changed, 17 insertions(+), 20 deletions(-)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 2b4a4dc213d8c..69650b1ac1484 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -3991,6 +3991,20 @@ static int setup_geo(struct geom *geo, struct mddev *mddev, enum geo_type new) return nc*fc; }
+static void raid10_free_conf(struct r10conf *conf) +{ + if (!conf) + return; + + mempool_exit(&conf->r10bio_pool); + kfree(conf->mirrors); + kfree(conf->mirrors_old); + kfree(conf->mirrors_new); + safe_put_page(conf->tmppage); + bioset_exit(&conf->bio_split); + kfree(conf); +} + static struct r10conf *setup_conf(struct mddev *mddev) { struct r10conf *conf = NULL; @@ -4073,13 +4087,7 @@ static struct r10conf *setup_conf(struct mddev *mddev) return conf;
out: - if (conf) { - mempool_exit(&conf->r10bio_pool); - kfree(conf->mirrors); - safe_put_page(conf->tmppage); - bioset_exit(&conf->bio_split); - kfree(conf); - } + raid10_free_conf(conf); return ERR_PTR(err); }
@@ -4285,10 +4293,7 @@ static int raid10_run(struct mddev *mddev)
out_free_conf: md_unregister_thread(&mddev->thread); - mempool_exit(&conf->r10bio_pool); - safe_put_page(conf->tmppage); - kfree(conf->mirrors); - kfree(conf); + raid10_free_conf(conf); mddev->private = NULL; out: return -EIO; @@ -4296,15 +4301,7 @@ static int raid10_run(struct mddev *mddev)
static void raid10_free(struct mddev *mddev, void *priv) { - struct r10conf *conf = priv; - - mempool_exit(&conf->r10bio_pool); - safe_put_page(conf->tmppage); - kfree(conf->mirrors); - kfree(conf->mirrors_old); - kfree(conf->mirrors_new); - bioset_exit(&conf->bio_split); - kfree(conf); + raid10_free_conf(priv); }
static void raid10_quiesce(struct mddev *mddev, int quiesce)