* [patch 061/102] ARM: use simpler API for random address requests
@ 2016-10-11 20:53 akpm
0 siblings, 0 replies; only message in thread
From: akpm @ 2016-10-11 20:53 UTC (permalink / raw)
To: torvalds, mm-commits, akpm, jason, catalin.marinas, keescook,
linux, tytso, will.deacon
From: Jason Cooper <jason@lakedaemon.net>
Subject: ARM: 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/20160803233913.32511-4-jason@lakedaemon.net
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: "Russell King - ARM Linux" <linux@arm.linux.org.uk>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
arch/arm/kernel/process.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff -puN arch/arm/kernel/process.c~arm-use-simpler-api-for-random-address-requests arch/arm/kernel/process.c
--- a/arch/arm/kernel/process.c~arm-use-simpler-api-for-random-address-requests
+++ a/arch/arm/kernel/process.c
@@ -318,8 +318,7 @@ unsigned long get_wchan(struct task_stru
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);
}
#ifdef CONFIG_MMU
_
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2016-10-11 20:54 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-10-11 20:53 [patch 061/102] ARM: use simpler API for random address requests akpm
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).