Disallow empty blobs from being read

[wimlib] / src / extract.c

diff --git a/src/extract.c b/src/extract.c
index 99320268e2a7a8af66a135cf927d93161d938363..83477f1337eb897cea1b5a41d90d8ddee8e0ac69 100644 (file)
--- a/src/extract.c
+++ b/src/extract.c
@@ -181,6 +181,10 @@ read_pwm_blob_header(WIMStruct *pwm, struct blob_descriptor *blob,
        wim_res_hdr_to_desc(&reshdr, pwm, rdesc);
        blob_set_is_located_in_nonsolid_wim_resource(blob, rdesc);
        blob->is_metadata = (rdesc->flags & WIM_RESHDR_FLAG_METADATA) != 0;
        wim_res_hdr_to_desc(&reshdr, pwm, rdesc);
        blob_set_is_located_in_nonsolid_wim_resource(blob, rdesc);
        blob->is_metadata = (rdesc->flags & WIM_RESHDR_FLAG_METADATA) != 0;

+
+       if (unlikely(blob->size == 0))
+               return WIMLIB_ERR_INVALID_PIPABLE_WIM;
+

        return 0;
 
 read_error:
        return 0;
 
 read_error: