Author: imp
Date: Fri Oct 26 22:49:36 2018
New Revision: 339799
URL: https://svnweb.freebsd.org/changeset/base/339799
Log:
Ensure that the device path is sane before trying to decode and print
it.
Sponsored by: Netflix, Inc
Modified:
head/lib/libefivar/efivar-dp-format.c
Modified: head/lib/libefivar/efivar-dp-format.c
==============================================================================
--- head/lib/libefivar/efivar-dp-format.c Fri Oct 26 22:49:25 2018
(r339798)
+++ head/lib/libefivar/efivar-dp-format.c Fri Oct 26 22:49:36 2018
(r339799)
@@ -2413,12 +2413,19 @@ UefiDevicePathLibConvertDevicePathToText (
}
}
-
ssize_t
efidp_format_device_path(char *buf, size_t len, const_efidp dp, ssize_t max)
{
char *str;
ssize_t retval;
+
+ /*
+ * Basic sanity check on the device path.
+ */
+ if (!IsDevicePathValid((CONST EFI_DEVICE_PATH_PROTOCOL *) dp, max)) {
+ *buf = '\0';
+ return 0;
+ }
str = UefiDevicePathLibConvertDevicePathToText (
__DECONST(EFI_DEVICE_PATH_PROTOCOL *, dp), FALSE, TRUE);
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