631a820038
Currently, if "linux" fails, the "goto fail;" in grub_cmd_initrd sends us into grub_initrd_close() without grub_initrd_init() being called, and thus it never clears initrd_ctx->components. grub_initrd_close() then frees that address, which is stale data from the stack. If the stack happens to have a stale *address* there that matches a recent allocation, then you'll get a double free later. So initialize the memory up front. Signed-off-by: Peter Jones <pjones@redhat.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. Please look at the GRUB Wiki <http://grub.enbug.org> for testing procedures. 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'