efi_loader: path length in efi_dp_from_name()
Before this patch efi_dp_from_name() only accommodated a maximum file path
length of 31 characters. This leads to boot failures due to file name
truncation.
Allow arbitrary path lengths.
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 4b20859..76c2f82 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -1171,7 +1171,7 @@
struct blk_desc *desc = NULL;
struct disk_partition fs_partition;
int part = 0;
- char filename[32] = { 0 }; /* dp->str is u16[32] long */
+ char *filename;
char *s;
if (path && !file)
@@ -1198,12 +1198,17 @@
if (!path)
return EFI_SUCCESS;
- snprintf(filename, sizeof(filename), "%s", path);
+ filename = calloc(1, strlen(path) + 1);
+ if (!filename)
+ return EFI_OUT_OF_RESOURCES;
+
+ sprintf(filename, "%s", path);
/* DOS style file path: */
s = filename;
while ((s = strchr(s, '/')))
*s++ = '\\';
*file = efi_dp_from_file(desc, part, filename);
+ free(filename);
if (!*file)
return EFI_INVALID_PARAMETER;