efi_loader: add protection for block_dev
Check the value of block_dev before to use this pointer.
This patch solves problem for the command "load" when ubifs
is previously mounted: in this case the function
blk_get_device_part_str("ubi 0") don't return error but return
block_dev = NULL and then data abort.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index 1b08ca8..d8c052d 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -968,7 +968,7 @@
if (!is_net) {
part = blk_get_device_part_str(dev, devnr, &desc, &fs_partition,
1);
- if (part < 0)
+ if (part < 0 || !desc)
return EFI_INVALID_PARAMETER;
if (device)