commit fbb9535aaea5ae4011f3c3edf4c00b27452f57ec
Author: Tom Cherry <tomcherry@google.com>
Date:   Tue Sep 17 13:34:04 2019 -0700

    fastboot: don't use sparse_file_import_auto() in load_buf_fd()
    
    load_buf_fd() attempts to find the size of the file that it is about
    to load by first calling sparse_file_import_auto() then using
    sparse_file_len() upon success or falling back to the file size on the
    filesystem on failure.
    
    This is problematic however as sparse_file_import_auto() creates a
    sparse_file out of the normal file, but does not resparse it, so an
    assertion fails during the sparse_file_len() call.
    
    This is fixed by using sparse_file_import() instead.  This will fail
    in the case that the file is not sparse and the call to
    sparse_file_len() will be properly skipped.
    
    Bug: 140538105
    Test: flash blueline factory image with assertions enabled in
          libsparse/sparse.cpp
    
    Change-Id: I0283be33563a3301ce5b09bde41105a20f91086c

diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index 4737ae4d66..a7fc628c43 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -874,7 +874,7 @@ static bool load_buf_fd(int fd, struct fastboot_buffer* buf) {
         return false;
     }
 
-    if (sparse_file* s = sparse_file_import_auto(fd, false, false)) {
+    if (sparse_file* s = sparse_file_import(fd, false, false)) {
         buf->image_size = sparse_file_len(s, false, false);
         sparse_file_destroy(s);
     } else {