1 files changed, 12 insertions, 0 deletions

diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index 6be2879cca66..7c098ac9068a 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -57,6 +57,11 @@ static int __init crd_load(int in_fd, int out_fd, decompress_fn deco);
  *      cramfs
  *      squashfs
  *      gzip
+ *      bzip2
+ *      lzma
+ *      xz
+ *      lzo
+ *      lz4
  */
 static int __init
 identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
@@ -342,6 +347,13 @@ static int __init crd_load(int in_fd, int out_fd, decompress_fn deco)
         int result;
         crd_infd = in_fd;
         crd_outfd = out_fd;
+
+        if (!deco) {
+                pr_emerg("Invalid ramdisk decompression routine.  "
+                         "Select appropriate config option.\n");
+                panic("Could not decompress initial ramdisk image.");
+        }
+
         result = deco(NULL, 0, compr_fill, compr_flush, NULL, NULL, error);
         if (decompress_error)
                 result = 1;