fs/squashfs: Fix Coverity Scan defects

[platform/kernel/u-boot.git] / fs / squashfs / sqfs_inode.c

diff --git a/fs/squashfs/sqfs_inode.c b/fs/squashfs/sqfs_inode.c
index b037a9b..1387779 100644 (file)
--- a/fs/squashfs/sqfs_inode.c
+++ b/fs/squashfs/sqfs_inode.c
@@ -138,11 +138,14 @@ void *sqfs_find_inode(void *inode_table, int inode_number, __le32 inode_count,
 int sqfs_read_metablock(unsigned char *file_mapping, int offset,
                        bool *compressed, u32 *data_size)
 {
-       unsigned char *data;
+       const unsigned char *data;
        u16 header;
 
        data = file_mapping + offset;
        header = get_unaligned((u16 *)data);
+       if (!header || !data)
+               return -EINVAL;
+
        *compressed = SQFS_COMPRESSED_METADATA(header);
        *data_size = SQFS_METADATA_SIZE(header);