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| author |   Andrey Ryabinin <a.ryabinin@samsung.com> | 2015-03-24 18:31:24 +0300 |
|---|---|---|
| committer |   Richard Weinberger <richard@nod.at> | 2015-04-13 21:16:12 +0200 |
| commit | fc9bea0e28db8cbfe0a08c1bfb1796bfd7adf49b (patch) | |
| tree | fa8b8d965677995b82d270f751103cc7a8d41a51 /arch/x86/um | |
| parent | um: hostfs: Reduce number of syscalls in readdir (diff) | |
| download | linux-dev-fc9bea0e28db8cbfe0a08c1bfb1796bfd7adf49b.tar.xz linux-dev-fc9bea0e28db8cbfe0a08c1bfb1796bfd7adf49b.zip | |
x86, UML: fix integer overflow in ELF_ET_DYN_BASE
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>
Diffstat (limited to 'arch/x86/um')
| -rw-r--r-- | arch/x86/um/asm/elf.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/um/asm/elf.h b/arch/x86/um/asm/elf.h index 25a1022dd793..0a656b727b1a 100644 --- a/arch/x86/um/asm/elf.h +++ b/arch/x86/um/asm/elf.h @@ -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) |