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Yi Yang 10b27fa2d6 serial: 8250: fix return error code in serial8250_request_std_resource() 
commit 6e690d54cf upstream.

If port->mapbase = NULL in serial8250_request_std_resource() , it need
return a error code instead of 0. If uart_set_info() fail to request new
regions by serial8250_request_std_resource() but the return value of
serial8250_request_std_resource() is 0, The system incorrectly considers
that the resource application is successful and does not attempt to
restore the old setting. A null pointer reference is triggered when the
port resource is later invoked.

Signed-off-by: Yi Yang <yiyang13@huawei.com>
Cc: stable <stable@kernel.org>
Link: https://lore.kernel.org/r/20220628083515.64138-1-yiyang13@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-07-21 21:24:43 +02:00
arch ARM: dts: stm32: use the correct clock source for CEC on stm32mp151 2022-07-21 21:24:40 +02:00
block block: fix rq-qos breakage from skipping rq_qos_done_bio() 2022-07-12 16:34:57 +02:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:22:01 +02:00
crypto crypto: memneq - move into lib/ 2022-06-22 14:22:03 +02:00
Documentation firmware: sysfb: Add sysfb_disable() helper function 2022-07-21 21:24:35 +02:00
drivers serial: 8250: fix return error code in serial8250_request_std_resource() 2022-07-21 21:24:43 +02:00
fs ksmbd: use SOCK_NONBLOCK type for kernel_accept() 2022-07-21 21:24:32 +02:00
include firmware: sysfb: Add sysfb_disable() helper function 2022-07-21 21:24:35 +02:00
init Kconfig: Add option for asm goto w/ tied outputs to workaround clang-13 bug 2022-06-09 10:23:26 +02:00
ipc ipc/mqueue: use get_tree_nodev() in mqueue_get_tree() 2022-06-09 10:23:10 +02:00
kernel signal handling: don't use BUG_ON() for debugging 2022-07-21 21:24:42 +02:00
lib ida: don't use BUG_ON() for debugging 2022-07-12 16:35:18 +02:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm: split huge PUD on wp_huge_pud fallback 2022-07-21 21:24:11 +02:00
net net: tipc: fix possible refcount leak in tipc_sk_create() 2022-07-21 21:24:35 +02:00
samples samples/landlock: Format with clang-format 2022-06-09 10:23:23 +02:00
scripts stddef: Introduce DECLARE_FLEX_ARRAY() helper 2022-07-12 16:35:03 +02:00
security ima: Fix potential memory leak in ima_init_crypto() 2022-07-21 21:24:29 +02:00
sound ALSA: usb-audio: Add quirk for Fiero SC-01 (fw v1.0.0) 2022-07-21 21:24:41 +02:00
tools selftests/net: fix section name when using xdp_dummy.o 2022-07-12 16:35:19 +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: Initialize debugfs_dentry when a VM is created to avoid NULL deref 2022-07-12 16:35:05 +02:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore
.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 Input: goodix - add a goodix.h header file 2022-07-12 16:34:51 +02:00
Makefile Linux 5.15.55 2022-07-15 10:13:00 +02:00
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.