[PATCH AUTOSEL 5.4 218/330] ubifs: ubifs_add_orphan: Fix a memory leak bug

Sasha Levin
2020-09-18T03:00:32Z

From: Zhihao Cheng <chengzhihao1@huawei.com>

[ Upstream commit 927cc5cec35f01fe4f8af0ba80830a90b0533983 ]

Memory leak occurs when files with extended attributes are added to
orphan list.

Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Fixes: 988bec41318f3fa897e2f8 ("ubifs: orphan: Handle xattrs like files")
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/ubifs/orphan.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c
index 7dd740e3692da..283f9eb48410d 100644
--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -157,7 +157,7 @@ int ubifs_add_orphan(struct ubifs_info *c, ino_t inum)
int err = 0;
ino_t xattr_inum;
union ubifs_key key;
- struct ubifs_dent_node *xent;
+ struct ubifs_dent_node *xent, *pxent = NULL;
struct fscrypt_name nm = {0};
struct ubifs_orphan *xattr_orphan;
struct ubifs_orphan *orphan;
@@ -181,11 +181,16 @@ int ubifs_add_orphan(struct ubifs_info *c, ino_t inum)
xattr_inum = le64_to_cpu(xent->inum);

xattr_orphan = orphan_add(c, xattr_inum, orphan);
- if (IS_ERR(xattr_orphan))
+ if (IS_ERR(xattr_orphan)) {
+ kfree(xent);
return PTR_ERR(xattr_orphan);
+ }

+ kfree(pxent);
+ pxent = xent;
key_read(c, &xent->key, &key);
}
+ kfree(pxent);

return 0;
}
--
2.25.1