From: Jason Cooper <jason@lakedaemon.net>
To: william.c.roberts@intel.com, linux-mm@vger.kernel.org,
linux-kernel@vger.kernel.org,
kernel-hardening@lists.openwall.com
Cc: Jason Cooper <jason@lakedaemon.net>,
linux@arm.linux.org.uk, akpm@linux-foundation.org,
keescook@chromium.org, tytso@mit.edu, arnd@arndb.de,
gregkh@linuxfoundation.org, catalin.marinas@arm.com,
will.deacon@arm.com, ralf@linux-mips.org,
benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au,
davem@davemloft.net, tglx@linutronix.de, mingo@redhat.com,
hpa@zytor.com, x86@kernel.org, viro@zeniv.linux.org.uk,
nnk@google.com, jeffv@google.com, alyzyn@android.com,
dcashman@android.com
Subject: [RFC patch 5/6] tile: Use simpler API for random address requests
Date: Tue, 26 Jul 2016 03:01:59 +0000 [thread overview]
Message-ID: <20160726030201.6775-5-jason@lakedaemon.net> (raw)
In-Reply-To: <20160726030201.6775-1-jason@lakedaemon.net>
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.
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
---
arch/tile/mm/mmap.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/tile/mm/mmap.c b/arch/tile/mm/mmap.c
index 851a94e6ae58..50f6a693a2b6 100644
--- a/arch/tile/mm/mmap.c
+++ b/arch/tile/mm/mmap.c
@@ -88,6 +88,5 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
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_addr(mm->brk, 0x02000000);
}
--
2.9.2
next prev parent reply other threads:[~2016-07-26 3:05 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-25 18:25 [PATCH] randomize_range: use random long instead of int william.c.roberts
2016-07-25 18:54 ` Kees Cook
2016-07-26 2:18 ` Jason Cooper
2016-07-26 3:01 ` [RFC patch 1/6] random: Simplify API for random address requests Jason Cooper
2016-07-26 3:01 ` [RFC patch 2/6] x86: Use simpler " Jason Cooper
2016-07-26 3:01 ` [RFC patch 3/6] ARM: " Jason Cooper
2016-07-26 3:01 ` [RFC patch 4/6] arm64: " Jason Cooper
2016-07-26 3:01 ` Jason Cooper [this message]
2016-07-26 3:02 ` [RFC patch 6/6] unicore32: " Jason Cooper
2016-07-26 3:30 ` [RFC patch 1/6] random: Simplify " Jason Cooper
2016-07-26 4:39 ` Kees Cook
2016-07-26 17:00 ` Jason Cooper
2016-07-26 17:07 ` Kees Cook
2016-07-28 19:02 ` Jason Cooper
2016-07-26 17:33 ` Roberts, William C
2016-07-26 4:44 ` Kees Cook
2016-07-26 15:55 ` Jason Cooper
2016-07-26 16:40 ` Kees Cook
2016-07-27 13:51 ` [kernel-hardening] " Yann Droneaud
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20160726030201.6775-5-jason@lakedaemon.net \
--to=jason@lakedaemon.net \
--cc=akpm@linux-foundation.org \
--cc=alyzyn@android.com \
--cc=arnd@arndb.de \
--cc=benh@kernel.crashing.org \
--cc=catalin.marinas@arm.com \
--cc=davem@davemloft.net \
--cc=dcashman@android.com \
--cc=gregkh@linuxfoundation.org \
--cc=hpa@zytor.com \
--cc=jeffv@google.com \
--cc=keescook@chromium.org \
--cc=kernel-hardening@lists.openwall.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@vger.kernel.org \
--cc=linux@arm.linux.org.uk \
--cc=mingo@redhat.com \
--cc=mpe@ellerman.id.au \
--cc=nnk@google.com \
--cc=paulus@samba.org \
--cc=ralf@linux-mips.org \
--cc=tglx@linutronix.de \
--cc=tytso@mit.edu \
--cc=viro@zeniv.linux.org.uk \
--cc=will.deacon@arm.com \
--cc=william.c.roberts@intel.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).