db506b3b83
In the function merge_state_with_log(), memory is allocated for the variable next_nodes when creating a union of the variables table_nodes and log_nodes. However, if next_state->entrance_nodes is NULL, then table_nodes becomes NULL and we still allocate memory to copy the content of log_nodes. This can cause a resource leak since we only free the memory for next_nodes if table_nodes isn't NULL. To prevent this, we need to check that next_state->entrance_nodes isn't NULL before allocating memory for the union. This issue has been fixed in the latest version of gnulib and I've backported this change to maintain consistency. This issue was found by a Coverity scan of GRUB2 under the CID 473887. Fixes: CID 473887 Signed-off-by: Alec Brown <alec.r.brown@oracle.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. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. 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'