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Andrey Konovalov 26dca996ea kasan: fix quarantine conflicting with init_on_free 
KASAN's quarantine might save its metadata inside freed objects.  As
this happens after the memory is zeroed by the slab allocator when
init_on_free is enabled, the memory coming out of quarantine is not
properly zeroed.

This causes lib/test_meminit.c tests to fail with Generic KASAN.

Zero the metadata when the object is removed from quarantine.

Link: https://lkml.kernel.org/r/2805da5df4b57138fdacd671f5d227d58950ba54.1640037083.git.andreyknvl@google.com
Fixes: 6471384af2 ("mm: security: introduce init_on_alloc=1 and init_on_free=1 boot options")
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15 16:30:26 +02:00
arch mm: defer kmemleak object creation of module_alloc() 2022-01-15 16:30:25 +02:00
block
certs
crypto
Documentation SoC; Fixes for 5.16, part 4 2022-01-08 12:56:16 -08:00
drivers device-dax: compound devmap support 2022-01-15 16:30:26 +02:00
fs fs/ioctl: remove unnecessary __user annotation 2022-01-15 16:30:25 +02:00
include mm/memremap: add ZONE_DEVICE support for compound pages 2022-01-15 16:30:25 +02:00
init
ipc
kernel trace/hwlat: make use of the helper function kthread_run_on_cpu() 2022-01-15 16:30:24 +02:00
lib kasan: test: add test case for double-kmem_cache_destroy() 2022-01-15 16:30:26 +02:00
LICENSES
mm kasan: fix quarantine conflicting with init_on_free 2022-01-15 16:30:26 +02:00
net Two more changes: 2022-01-04 07:18:28 -08:00
samples ftrace/samples: Add missing prototypes direct functions 2022-01-05 18:34:50 -05:00
scripts scripts/spelling.txt: add "oveflow" 2022-01-15 16:30:24 +02:00
security
sound
tools perf tools fixes for v5.16: 6th batch 2022-01-09 10:37:07 -08:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: update gpio-brcmstb maintainers 2022-01-03 10:53:02 +01:00
Makefile Linux 5.16 2022-01-09 14:55:34 -08:00
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.