[PATCH] ocfs2: fix memory leak

Jiri Slaby
2010-11-06T09:07:36Z

Stanse found that o2hb_heartbeat_group_make_item leaks some memory on
fail paths. Fix the paths by adding a new label and jump there.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <joel.becker@oracle.com>
Cc: ocfs2-devel@oss.oracle.com
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
---
fs/ocfs2/cluster/heartbeat.c | 14 ++++++++++----
1 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index 52c7557..9f26ac9 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1964,8 +1964,10 @@ static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *g
if (reg == NULL)
return ERR_PTR(-ENOMEM);

- if (strlen(name) > O2HB_MAX_REGION_NAME_LEN)
- return ERR_PTR(-ENAMETOOLONG);
+ if (strlen(name) > O2HB_MAX_REGION_NAME_LEN) {
+ ret = -ENAMETOOLONG;
+ goto free;
+ }

spin_lock(&o2hb_live_lock);
reg->hr_region_num = 0;
@@ -1974,7 +1976,8 @@ static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *g
O2NM_MAX_REGIONS);
if (reg->hr_region_num >= O2NM_MAX_REGIONS) {
spin_unlock(&o2hb_live_lock);
- return ERR_PTR(-EFBIG);
+ ret = -EFBIG;
+ goto free;
}
set_bit(reg->hr_region_num, o2hb_region_bitmap);
}
@@ -1986,10 +1989,13 @@ static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *g
ret = o2hb_debug_region_init(reg, o2hb_debug_dir);
if (ret) {
config_item_put(&reg->hr_item);
- return ERR_PTR(ret);
+ goto free;
}

return &reg->hr_item;
+free:
+ kfree(reg);
+ return ERR_PTR(ret);
}

static void o2hb_heartbeat_group_drop_item(struct config_group *group,
--
1.7.3.1