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linux-sg2042
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x86, vdso: Fix size of get_unmapped_area() 

The size of the reserved memory for a 32 bit vdso must be the size of the
32 bit vDSO in pages + HPET page + VVAR page.

One page is not enough for this. Grrrr.... silly copy and paste bug,
was right in previous patch.

Signed-off-by: Stefani Seibold <stefani@seibold.net>
Cc: Andy Lutomirski <luto@amacapital.net>
Link: http://lkml.kernel.org/r/1395592694-20571-1-git-send-email-stefani@seibold.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
Stefani Seibold 2014-03-23 17:38:14 +01:00 committed by H. Peter Anvin
parent 3c1b63b9e4
commit 645a387ecb
1 changed files with 3 additions and 1 deletions
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4
arch/x86/vdso/vdso32-setup.c
View File

@ -165,12 +165,14 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
down_write(&mm->mmap_sem);
addr = get_unmapped_area(NULL, 0, PAGE_SIZE, 0, 0);
addr = get_unmapped_area(NULL, 0, vdso32_size + VDSO_OFFSET(VDSO_PREV_PAGES), 0, 0);
if (IS_ERR_VALUE(addr)) {
ret = addr;
goto up_fail;
}
addr += VDSO_OFFSET(VDSO_PREV_PAGES);
current->mm->context.vdso = (void *)addr;
/*