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-rw-r--r--fs/udf/inode.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 95cb6970c3e..7b72b7dd890 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1487,6 +1487,15 @@ reread:
}
inode->i_generation = iinfo->i_unique;
+ /*
+ * Sanity check length of allocation descriptors and extended attrs to
+ * avoid integer overflows
+ */
+ if (iinfo->i_lenEAttr > bs || iinfo->i_lenAlloc > bs)
+ goto out;
+ /* Now do exact checks */
+ if (udf_file_entry_alloc_offset(inode) + iinfo->i_lenAlloc > bs)
+ goto out;
/* Sanity checks for files in ICB so that we don't get confused later */
if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
/*