Thread (39 messages) 39 messages, 10 authors, 2018-04-03

Re: [RFC PATCH v2 0/2] Randomization of address chosen by mmap.

From: Matthew Wilcox <willy@infradead.org>
Date: 2018-03-23 12:48:06
Also in: linux-alpha, linux-mips, linux-mm, linux-s390, linux-sh, lkml, sparclinux

On Thu, Mar 22, 2018 at 07:36:36PM +0300, Ilya Smith wrote:
Current implementation doesn't randomize address returned by mmap.
All the entropy ends with choosing mmap_base_addr at the process
creation. After that mmap build very predictable layout of address
space. It allows to bypass ASLR in many cases. This patch make
randomization of address on any mmap call.
Why should this be done in the kernel rather than libc?  libc is perfectly
capable of specifying random numbers in the first argument of mmap.
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help