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x86, UML: fix integer overflow in ELF_ET_DYN_BASE

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Almost all arches define ELF_ET_DYN_BASE as 2/3 of TASK_SIZE.
Though it seems that some architectures do this in a wrong way.
The problem is that 2*TASK_SIZE may overflow 32-bits so
the real ELF_ET_DYN_BASE becomes wrong.
Fix this overflow by dividing TASK_SIZE prior to multiplying:
	(TASK_SIZE / 3 * 2)

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Andrey Ryabinin 2015-03-24 18:31:24 +03:00 committed by Richard Weinberger
parent 0c9bd6365d
commit fc9bea0e28
1 changed files with 1 additions and 1 deletions
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2
arch/x86/um/asm/elf.h
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@ -210,7 +210,7 @@ extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
#define ELF_EXEC_PAGESIZE 4096
#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
extern long elf_aux_hwcap;
#define ELF_HWCAP (elf_aux_hwcap)