Date: Fri, 14 Jun 2002 22:32:58 +0200 (CEST) From: Espen Skoglund <esk@ira.uka.de> To: FreeBSD-gnats-submit@FreeBSD.org Subject: ia64/39415: Bootloader assuming 8KB buffer when only 4KB is allocated Message-ID: <200206142032.g5EKWwk2016168@i30nb20.ira.uka.de>
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>Number: 39415
>Category: ia64
>Synopsis: Bootloader assuming 8KB buffer when only 4KB is allocated
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-ia64
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Jun 17 06:10:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Espen Skoglund
>Release: FreeBSD 5.0-CURRENT ia64
>Organization:
Karlsruhe University
>Environment:
>Description:
The AllocatePages() call in sys/boot/efi/libefi/elf_freebsd.c only
allocate one 4KB page. The bi_load() in sys/boot/efi/libefi/bootinfo.c,
however, assumes that 8KB has been allocated when stashing the EFI memory
map behind the bootinfo. This could lead to "interesting" behaviour
in certain (albeit probably unlikely) scenarios.
>How-To-Repeat:
>Fix:
Make sure that 8KB are allocated instead of only 4KB.
--- elf_freebsd.c.orig Fri Jun 14 22:21:42 2002
+++ elf_freebsd.c Fri Jun 14 22:22:13 2002
@@ -151,7 +151,7 @@
hdr = (Elf_Ehdr *)&(md->md_data);
status = BS->AllocatePages(AllocateAnyPages, EfiLoaderData,
- EFI_SIZE_TO_PAGES(sizeof(struct bootinfo)), (void*)&bi);
+ 8192/4096, (void*)&bi);
if (EFI_ERROR(status)) {
printf("unable to create bootinfo block (status=0x%lx)\n",
(long)status);
>Release-Note:
>Audit-Trail:
>Unformatted:
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