lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

kexec jump: check code size in control page

Browse Source 
Kexec/Kexec-jump require code size in control page is less than
PAGE_SIZE/2.  This patch add link-time checking for this.

ASSERT() of ld link script is used as the link-time checking mechanism.

[akpm@linux-foundation.org: build fix]
Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Huang Ying
2008-08-15 00:40:23 -07:00
committed by Linus Torvalds
parent 163f6876f5
commit fb45daa69d
4 changed files with 20 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/kernel/machine_kexec_32.c
View File

@@ -138,7 +138,7 @@ void machine_kexec(struct kimage *image)
}
control_page = page_address(image->control_code_page);
memcpy(control_page, relocate_kernel, PAGE_SIZE/2);
memcpy(control_page, relocate_kernel, KEXEC_CONTROL_CODE_MAX_SIZE);
relocate_kernel_ptr = control_page;
page_list[PA_CONTROL_PAGE] = __pa(control_page);