Darren Kenny 6aee4bfd69 kern/efi/mm: Fix possible NULL pointer dereference ... The model of grub_efi_get_memory_map() is that if memory_map is NULL, then the purpose is to discover how much memory should be allocated to it for the subsequent call. The problem here is that with grub_efi_is_finished set to 1, there is no check at all that the function is being called with a non-NULL memory_map. While this MAY be true, we shouldn't assume it. The solution to this is to behave as expected, and if memory_map is NULL, then don't try to use it and allow memory_map_size to be filled in, and return 0 as is done later in the code if the buffer is too small (or NULL). Additionally, drop unneeded ret = 1. Fixes: CID 96632 Signed-off-by: Darren Kenny <darren.kenny@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>		2021-03-02 15:54:16 +01:00
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acpi.c	tsc: Use alternative delay sources whenever appropriate.	2015-11-27 11:39:55 +01:00
efi.c	kern/efi: Fix memory leak on failure	2021-03-02 15:54:16 +01:00
fdt.c	efi: Move fdt helper into own file	2016-11-24 10:09:24 +01:00
init.c	efi: Lockdown the GRUB when the UEFI Secure Boot is enabled	2021-03-02 15:54:15 +01:00
mm.c	kern/efi/mm: Fix possible NULL pointer dereference	2021-03-02 15:54:16 +01:00
sb.c	efi: Use grub_is_lockdown() instead of hardcoding a disabled modules list	2021-03-02 15:54:15 +01:00