[PATCH 4.9 055/222] f2fs: fix memory leak of percpu counter in fill_super()

[Greg Kroah-Hartman]

From: Chao Yu <yuchao0@xxxxxxxxxx>

[ Upstream commit 4a70e255449c9a13eed7a6eeecc85a1ea63cef76 ]

In fill_super -> init_percpu_info, we should destroy percpu counter
in error path, otherwise memory allcoated for percpu counter will
leak.

Signed-off-by: Chao Yu <yuchao0@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 fs/f2fs/super.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 9eff18c1f3e46..e0ac676e0a35c 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1650,8 +1650,12 @@ static int init_percpu_info(struct f2fs_sb_info *sbi)
 	if (err)
 		return err;
 
-	return percpu_counter_init(&sbi->total_valid_inode_count, 0,
+	err = percpu_counter_init(&sbi->total_valid_inode_count, 0,
 								GFP_KERNEL);
+	if (err)
+		percpu_counter_destroy(&sbi->alloc_valid_block_count);
+
+	return err;
 }
 
 /*
-- 
2.20.1