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Wei Yongjun be96baa0c7 regulator: da9121: Fix uninit-value in da9121_assign_chip_model() 
[ Upstream commit bab76514ac ]

KASAN report slab-out-of-bounds in __regmap_init as follows:

BUG: KASAN: slab-out-of-bounds in __regmap_init drivers/base/regmap/regmap.c:841
Read of size 1 at addr ffff88803678cdf1 by task xrun/9137

CPU: 0 PID: 9137 Comm: xrun Tainted: G        W         5.18.0-rc2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x15a lib/dump_stack.c:88
 print_report.cold+0xcd/0x69b mm/kasan/report.c:313
 kasan_report+0x8e/0xc0 mm/kasan/report.c:491
 __regmap_init+0x4540/0x4ba0 drivers/base/regmap/regmap.c:841
 __devm_regmap_init+0x7a/0x100 drivers/base/regmap/regmap.c:1266
 __devm_regmap_init_i2c+0x65/0x80 drivers/base/regmap/regmap-i2c.c:394
 da9121_i2c_probe+0x386/0x6d1 drivers/regulator/da9121-regulator.c:1039
 i2c_device_probe+0x959/0xac0 drivers/i2c/i2c-core-base.c:563

This happend when da9121 device is probe by da9121_i2c_id, but with
invalid dts. Thus, chip->subvariant_id is set to -EINVAL, and later
da9121_assign_chip_model() will access 'regmap' without init it.

Fix it by return -EINVAL from da9121_assign_chip_model() if
'chip->subvariant_id' is invalid.

Fixes: f3fbd5566f ("regulator: da9121: Add device variants")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Adam Ward <Adam.Ward.Opensource@diasemi.com>
Link: https://lore.kernel.org/r/20220421090335.1876149-1-weiyongjun1@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-09 10:22:48 +02:00
arch x86/PCI: Fix ALi M1487 (IBC) PIRQ router link value interpretation 2022-06-09 10:22:46 +02:00
block iocost: don't reset the inuse weight of under-weighted debtors 2022-05-09 09:14:31 +02:00
certs certs: Add support for using elliptic curve keys for signing modules 2021-08-23 19:55:42 +03:00
crypto crypto: ecrdsa - Fix incorrect use of vli_cmp 2022-06-06 08:43:39 +02:00
Documentation spi: qcom-qspi: Add minItems to interconnect-names 2022-06-09 10:22:45 +02:00
drivers regulator: da9121: Fix uninit-value in da9121_assign_chip_model() 2022-06-09 10:22:48 +02:00
fs smb3: check for null tcon 2022-06-09 10:22:43 +02:00
include device property: Allow error pointer to be passed to fwnode APIs 2022-06-09 10:22:47 +02:00
init random: handle latent entropy and command line from random_init() 2022-05-30 09:29:16 +02:00
ipc ipc/sem: do not sleep with a spin lock held 2022-02-08 18:34:03 +01:00
kernel scftorture: Fix distribution of short handler delays 2022-06-09 10:22:46 +02:00
lib lib/crypto: add prompts back to crypto libraries 2022-06-06 08:43:37 +02:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm zsmalloc: fix races between asynchronous zspage free and page migration 2022-06-06 08:43:39 +02:00
net NFC: NULL out the dev->rfkill to prevent UAF 2022-06-09 10:22:46 +02:00
samples x86: Prepare inline-asm for straight-line-speculation 2022-05-15 20:18:50 +02:00
scripts x86: Add straight-line-speculation mitigation 2022-05-15 20:18:51 +02:00
security lockdown: also lock down previous kgdb use 2022-05-25 09:57:37 +02:00
sound ASoC: mediatek: Fix missing of_node_put in mt2701_wm8960_machine_probe 2022-06-09 10:22:45 +02:00
tools libbpf: Don't error out on CO-RE relos for overriden weak subprogs 2022-06-09 10:22:46 +02:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:27:15 +01:00
virt KVM: avoid NULL pointer dereference in kvm_dirty_ring_push 2022-04-13 20:59:26 +02:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: add git tree for random.c 2022-05-30 09:28:59 +02:00
Makefile Linux 5.15.45 2022-06-06 08:43:42 +02:00
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.