win32_apply.c: Don't externally back very large files

diff --git a/src/win32_apply.c b/src/win32_apply.c
index 26814f68eab5b3535b63ee2bb00e7550fbafa03f..4c65fefea3f6c44f5b56128706a726d7e4fc0a44 100644 (file)
--- a/src/win32_apply.c
+++ b/src/win32_apply.c
@@ -392,10 +392,13 @@ will_externally_back_inode(struct wim_inode *inode, struct win32_apply_ctx *ctx,
 
        stream = inode_unnamed_lte_resolved(inode);
 
+       /* Note: Microsoft's WoF driver errors out if it tries to satisfy a
+        * read, with ending offset >= 4 GiB, from an externally backed file. */
        if (!stream ||
            stream->resource_location != RESOURCE_IN_WIM ||
            stream->rspec->wim != ctx->common.wim ||
-           stream->size != stream->rspec->uncompressed_size)
+           stream->size != stream->rspec->uncompressed_size ||
+           stream->size > 4200000000)
                return WIM_BACKING_NOT_POSSIBLE;
 
        /*