dfs: check for null reference

2014-10-14 16:09:10 +08:00 · 2014-10-14 16:09:10 +08:00 · 9a75583349
commit 9a75583349
parent 4c39f8765a
1 changed files with 3 additions and 0 deletions
--- a/components/dfs/src/dfs_file.c
+++ b/components/dfs/src/dfs_file.c
@ -335,6 +335,9 @@ int dfs_file_lseek(struct dfs_fd *fd, rt_off_t offset)

    if (fd == RT_NULL)
        return -DFS_STATUS_EINVAL;
+    fs = fd->fs;
+    if (fs == RT_NULL)
+        return -DFS_STATUS_EINVAL;
    if (fs->ops->lseek == RT_NULL)
        return -DFS_STATUS_ENOSYS;