dc052e5ac7
When grub_json_parse() succeeds, it returns the root object which contains a pointer to the provided JSON string. Callers are responsible for ensuring that this string outlives the root object and for freeing its memory when it's no longer needed. If grub_json_parse() fails to parse the provided JSON string, it frees the string before returning an error. This results in a double free in luks2_recover_key(), which also frees the same string after grub_json_parse() returns an error. This changes grub_json_parse() to never free the JSON string passed to it, and updates the documentation for it to make it clear that callers are responsible for ensuring that the string outlives the root JSON object. Fixes: CID 292465 Signed-off-by: Chris Coulson <chris.coulson@canonical.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'