d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

efi loader: disallow user to configure staging area size less than default

Browse Source 
We need to round it up to 2M, for instance.  Having staging area too small
might cause the first resize to use negative size for memmove()/memcpy(),
which kills loader.

Tested by:	Harry Schmalzbauer <freebsd@omnilan.de>
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2021-08-27 00:46:48 +03:00
parent b850806921
commit b54eec8366
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
stand/efi/loader/copy.c
View File

@ -178,12 +178,13 @@ efi_verify_staging_size(unsigned long *nr_pages)
}
#endif /* __i386__ || __amd64__ */
#ifndef EFI_STAGING_SIZE
#if defined(__arm__)
#define EFI_STAGING_SIZE 32
#define DEFAULT_EFI_STAGING_SIZE 32
#else
#define EFI_STAGING_SIZE 64
#define DEFAULT_EFI_STAGING_SIZE 64
#endif
#ifndef EFI_STAGING_SIZE
#define EFI_STAGING_SIZE DEFAULT_EFI_STAGING_SIZE
#endif
#if defined(__aarch64__) || defined(__amd64__) || defined(__arm__) || \
@ -314,8 +315,12 @@ efi_copy_init(void)
{
EFI_STATUS status;
unsigned long nr_pages;
vm_offset_t ess;
nr_pages = EFI_SIZE_TO_PAGES(M(1) * (EFI_STAGING_SIZE));
ess = EFI_STAGING_SIZE;
if (ess < DEFAULT_EFI_STAGING_SIZE)
ess = DEFAULT_EFI_STAGING_SIZE;
nr_pages = EFI_SIZE_TO_PAGES(M(1) * ess);
#if defined(__i386__) || defined(__amd64__)
/*