diff options
| author | Jason Cooper <jason@lakedaemon.net> | 2016-10-11 13:53:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-11 15:06:32 -0700 |
| commit | 9c6f0902a55226b08b9703408f04b258b9afa0bc (patch) | |
| tree | 49d7c8d8f3e1e058c7436b2d21d0430623bca186 /arch/x86/kernel/process.c | |
| parent | 99fdafdeacfa99ca9047641b684fa2aaf094a661 (diff) | |
| download | linux-9c6f0902a55226b08b9703408f04b258b9afa0bc.tar.gz linux-9c6f0902a55226b08b9703408f04b258b9afa0bc.tar.bz2 linux-9c6f0902a55226b08b9703408f04b258b9afa0bc.zip | |
x86: use simpler API for random address requests
Currently, all callers to randomize_range() set the length to 0 and
calculate end by adding a constant to the start address. We can simplify
the API to remove a bunch of needless checks and variables.
Use the new randomize_addr(start, range) call to set the requested
address.
Link: http://lkml.kernel.org/r/20160803233913.32511-3-jason@lakedaemon.net
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/kernel/process.c')
| -rw-r--r-- | arch/x86/kernel/process.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 28cea7802ecb..0888a879120f 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -509,8 +509,7 @@ unsigned long arch_align_stack(unsigned long sp) unsigned long arch_randomize_brk(struct mm_struct *mm) { - unsigned long range_end = mm->brk + 0x02000000; - return randomize_range(mm->brk, range_end, 0) ? : mm->brk; + return randomize_page(mm->brk, 0x02000000); } /* |