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Stefan Wahren 725d44e49f ARM: sun9i: smp: Fix array-index-out-of-bounds read in sunxi_mc_smp_init 
[ Upstream commit 72ad3b772b ]

Running a multi-arch kernel (multi_v7_defconfig) on a Raspberry Pi 3B+
with enabled CONFIG_UBSAN triggers the following warning:

 UBSAN: array-index-out-of-bounds in arch/arm/mach-sunxi/mc_smp.c:810:29
 index 2 is out of range for type 'sunxi_mc_smp_data [2]'
 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.7.0-rc6-00248-g5254c0cbc92d
 Hardware name: BCM2835
  unwind_backtrace from show_stack+0x10/0x14
  show_stack from dump_stack_lvl+0x40/0x4c
  dump_stack_lvl from ubsan_epilogue+0x8/0x34
  ubsan_epilogue from __ubsan_handle_out_of_bounds+0x78/0x80
  __ubsan_handle_out_of_bounds from sunxi_mc_smp_init+0xe4/0x4cc
  sunxi_mc_smp_init from do_one_initcall+0xa0/0x2fc
  do_one_initcall from kernel_init_freeable+0xf4/0x2f4
  kernel_init_freeable from kernel_init+0x18/0x158
  kernel_init from ret_from_fork+0x14/0x28

Since the enabled method couldn't match with any entry from
sunxi_mc_smp_data, the value of the index shouldn't be used right after
the loop. So move it after the check of ret in order to have a valid
index.

Fixes: 1631090e34 ("ARM: sun9i: smp: Add is_a83t field")
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Link: https://lore.kernel.org/r/20231228193903.9078-1-wahrenst@gmx.net
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-01-10 17:10:24 +01:00
arch ARM: sun9i: smp: Fix array-index-out-of-bounds read in sunxi_mc_smp_init 2024-01-10 17:10:24 +01:00
block block: Don't invalidate pagecache for invalid falloc modes 2024-01-10 17:10:20 +01:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-02-09 11:28:11 +01:00
crypto crypto: pcrypt - Fix hungtask for PADATA_RESET 2023-11-28 17:06:58 +00:00
Documentation dt-bindings: nvmem: mxs-ocotp: Document fsl,ocotp 2024-01-01 12:39:04 +00:00
drivers r8169: Fix PCI error on system resume 2024-01-10 17:10:23 +01:00
fs cifs: do not depend on release_iface for maintaining iface_list 2024-01-10 17:10:21 +01:00
include net: annotate data-races around sk->sk_tsflags 2024-01-10 17:10:23 +01:00
init proc: sysctl: prevent aliased sysctls from getting passed to init 2023-11-28 17:07:08 +00:00
io_uring io_uring: fix mutex_unlock with unreferenced ctx 2023-12-13 18:39:18 +01:00
ipc ipc: fix memory leak in init_mqueue_fs() 2022-12-31 13:32:01 +01:00
kernel tracing/kprobes: Fix symbol counting logic by looking at modules as well 2024-01-05 15:18:40 +01:00
lib lib/vsprintf: Fix %pfwf when current node refcount == 0 2024-01-01 12:39:07 +00:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm mm/memory-failure: check the mapcount of the precise page 2024-01-05 15:18:39 +01:00
net net: Implement missing getsockopt(SO_TIMESTAMPING_NEW) 2024-01-10 17:10:24 +01:00
rust rust: allocator: Prevent mis-aligned allocation 2023-08-11 12:08:18 +02:00
samples fprobe: Pass entry_data to handlers 2023-10-25 12:03:12 +02:00
scripts sign-file: Fix incorrect return values check 2023-12-20 17:00:19 +01:00
security keys, dns: Allow key types (eg. DNS) to be reclaimed immediately on expiry 2024-01-01 12:38:58 +00:00
sound ASoC: mediatek: mt8186: fix AUD_PAD_TOP register and offset 2024-01-10 17:10:23 +01:00
tools selftests: bonding: do not set port down when adding to bond 2024-01-10 17:10:24 +01:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt kvm/vfio: ensure kvg instance stays around in kvm_vfio_group_add() 2023-09-13 09:42:46 +02:00
.clang-format inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove Michal Marek from Kbuild maintainers 2022-11-16 14:53:00 +09:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS devlink: move code to a dedicated directory 2023-08-30 16:11:00 +02:00
Makefile Linux 6.1.71 2024-01-05 15:18:41 +01:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.