[PATCH v2-changed] erofs-utils: mount: fix memory leak in erofs_nbd_get_identifier

[ChengyuZhu6]

From: Chengyu Zhu <hudsonzhu at tencent.com>

The erofs_nbd_get_identifier() function returns dynamically allocated
memory via getline(), but the caller in erofsmount_nbd() was not
freeing this memory, causing a 120-byte memory leak.

Add proper memory cleanup by calling free(id) when the identifier
is not an error pointer.

Signed-off-by: Chengyu Zhu <hudsonzhu at tencent.com>
---
 mount/main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mount/main.c b/mount/main.c
index b22a729..c52ac3b 100644
--- a/mount/main.c
+++ b/mount/main.c
@@ -691,6 +691,8 @@ static int erofsmount_nbd(struct erofs_nbd_source *source,
 			if (err)
 				erofs_warn("failed to turn on autoclear for nbd%d: %s",
 					   num, erofs_strerror(err));
+			if (!IS_ERR(id))
+				free(id);
 		}
 	}
 	return err;
-- 
2.51.0