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Kees Cook 89b83f282d slub: avoid redzone when choosing freepointer location 
Marco Elver reported system crashes when booting with "slub_debug=Z".

The freepointer location (s->offset) was not taking into account that
the "inuse" size that includes the redzone area should not be used by
the freelist pointer.  Change the calculation to save the area of the
object that an inline freepointer may be written into.

Fixes: 3202fa62fb ("slub: relocate freelist pointer to middle of object")
Reported-by: Marco Elver <elver@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Marco Elver <elver@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Link: http://lkml.kernel.org/r/202004151054.BD695840@keescook
Link: https://lore.kernel.org/linux-mm/20200415164726.GA234932@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-04-21 11:11:55 -07:00
arch sh: fix build error in mm/init.c 2020-04-21 11:11:55 -07:00
block blk-wbt: Use tracepoint_string() for wbt_step tracepoint string literals 2020-04-17 08:21:44 -06:00
certs
crypto
Documentation hwmon fixes for v5.7-rc2 2020-04-18 13:28:09 -07:00
drivers Two build fixes for a couple clk drivers and a fix for the Unisoc serial 2020-04-19 13:59:06 -07:00
fs An update for the proc interface of time namespaces: Use symbolic names 2020-04-19 11:46:21 -07:00
include A set of fixes/updates for the interrupt subsystem: 2020-04-19 11:23:33 -07:00
init
ipc
kernel An update for the proc interface of time namespaces: Use symbolic names 2020-04-19 11:46:21 -07:00
lib
LICENSES
mm slub: avoid redzone when choosing freepointer location 2020-04-21 11:11:55 -07:00
net
samples
scripts A handful of fixes for reasonably obnoxious documentation issues. 2020-04-17 13:10:50 -07:00
security
sound sound fixes for 5.7-rc2 2020-04-17 09:48:50 -07:00
tools A set of fixes for x86 and objtool: 2020-04-19 11:58:32 -07:00
usr
virt
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.cocciconfig
.get_maintainer.ignore
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COPYING
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Kbuild
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MAINTAINERS SCSI fixes on 20200418 2020-04-18 14:03:12 -07:00
Makefile Linux 5.7-rc2 2020-04-19 14:35:30 -07:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.