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Alexander Potapenko 42eaa27d9e security: kmsan: fix interoperability with auto-initialization 
Heap and stack initialization is great, but not when we are trying uses of
uninitialized memory.  When the kernel is built with KMSAN, having kernel
memory initialization enabled may introduce false negatives.

We disable CONFIG_INIT_STACK_ALL_PATTERN and CONFIG_INIT_STACK_ALL_ZERO
under CONFIG_KMSAN, making it impossible to auto-initialize stack
variables in KMSAN builds.  We also disable
CONFIG_INIT_ON_ALLOC_DEFAULT_ON and CONFIG_INIT_ON_FREE_DEFAULT_ON to
prevent accidental use of heap auto-initialization.

We however still let the users enable heap auto-initialization at
boot-time (by setting init_on_alloc=1 or init_on_free=1), in which case a
warning is printed.

Link: https://lkml.kernel.org/r/20220915150417.722975-31-glider@google.com
Signed-off-by: Alexander Potapenko <glider@google.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Konovalov <andreyknvl@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Eric Biggers <ebiggers@kernel.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Marco Elver <elver@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-10-03 14:03:23 -07:00
..
apparmor apparmor: correct config reference to intended one 2022-07-20 13:22:19 -07:00
bpf
integrity integrity-v6.0 2022-08-02 15:21:18 -07:00
keys KEYS: trusted: tpm2: Fix migratable logic 2022-06-08 14:12:13 +03:00
landlock landlock: Add support for file reparenting with LANDLOCK_ACCESS_FS_REFER 2022-05-23 13:27:59 +02:00
loadpin LoadPin: Return EFAULT on copy_from_user() failures 2022-08-16 12:17:18 -07:00
lockdown
safesetid LSM: SafeSetID: Add setgroups() security policy handling 2022-07-15 18:24:42 +00:00
selinux selinux/stable-6.0 PR 20220801 2022-08-02 14:51:47 -07:00
smack smack: Remove the redundant lsm_inode_alloc 2022-08-01 11:26:09 -07:00
tomoyo LSM: Remove double path_rename hook calls for RENAME_EXCHANGE 2022-05-23 13:27:58 +02:00
yama
commoncap.c
device_cgroup.c bpf: Make BPF_PROG_RUN_ARRAY return -err instead of allow boolean 2022-01-19 12:51:30 -08:00
inode.c
Kconfig x86/retbleed: Add fine grained Kconfig knobs 2022-06-29 17:43:41 +02:00
Kconfig.hardening security: kmsan: fix interoperability with auto-initialization 2022-10-03 14:03:23 -07:00
lsm_audit.c selinux: log anon inode class name 2022-05-03 16:09:03 -04:00
Makefile
min_addr.c
security.c SafeSetID changes for Linux 6.0 2022-08-02 15:12:13 -07:00