WSL2-Linux-Kernel

The source for the Linux kernel used in Windows Subsystem for Linux 2 (WSL2)

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Ilpo Järvinen d0bcf6caa2 serial: 8250: Fix serial8250_tx_empty() race with DMA Tx commit `146a37e05d` upstream. There's a potential race before THRE/TEMT deasserts when DMA Tx is starting up (or the next batch of continuous Tx is being submitted). This can lead to misdetecting Tx empty condition. It is entirely normal for THRE/TEMT to be set for some time after the DMA Tx had been setup in serial8250_tx_dma(). As Tx side is definitely not empty at that point, it seems incorrect for serial8250_tx_empty() claim Tx is empty. Fix the race by also checking in serial8250_tx_empty() whether there's DMA Tx active. Note: This fix only addresses in-kernel race mainly to make using TCSADRAIN/FLUSH robust. Userspace can still cause other races but they seem userspace concurrency control problems. Fixes: `9ee4b83e51` ("serial: 8250: Add support for dmaengine") Cc: stable@vger.kernel.org Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Link: https://lore.kernel.org/r/20230317113318.31327-3-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-05-17 11:50:31 +02:00
Documentation	riscv: Move early dtb mapping into the fixmap region	2023-05-01 08:23:24 +09:00
LICENSES	…
arch	ARM: dts: s5pv210: correct MIPI CSIS clock name	2023-05-17 11:50:24 +02:00
block	blk-crypto: make blk_crypto_evict_key() more robust	2023-05-11 23:00:16 +09:00
certs	…
crypto	crypto: engine - fix crypto_queue backlog handling	2023-05-17 11:50:20 +02:00
drivers	serial: 8250: Fix serial8250_tx_empty() race with DMA Tx	2023-05-17 11:50:31 +02:00
fs	ext4: fix invalid free tracking in ext4_xattr_move_to_block()	2023-05-17 11:50:30 +02:00
include	ASoC: soc-pcm: Fix DPCM lockdep warning due to nested stream locks	2023-05-17 11:50:26 +02:00
init	…
io_uring	io_uring: avoid null-ptr-deref in io_arm_poll_handler	2023-03-22 13:31:37 +01:00
ipc	…
kernel	locking/rwsem: Add __always_inline annotation to __down_read_common() and inlined callers	2023-05-17 11:50:29 +02:00
lib	debugobject: Ensure pool refill (again)	2023-05-11 23:00:40 +09:00
mm	writeback, cgroup: fix null-ptr-deref write in bdi_split_work_to_wbs	2023-05-11 23:00:18 +09:00
net	af_packet: Don't send zero-byte data in packet_sendmsg_spkt().	2023-05-17 11:50:18 +02:00
samples	…
scripts	scripts/gdb: fix lx-timerlist for Python3	2023-05-11 23:00:39 +09:00
security	selinux: ensure av_permissions.h is built when needed	2023-05-11 23:00:19 +09:00
sound	ASoC: soc-pcm.c: call __soc_pcm_close() in soc_pcm_close()	2023-05-17 11:50:27 +02:00
tools	perf stat: Separate bperf from bpf_profiler	2023-05-17 11:50:21 +02:00
usr	…
virt	KVM: fix memoryleak in kvm_init()	2023-03-17 08:49:04 +01:00
.clang-format	…
.cocciconfig	…
.get_maintainer.ignore	…
.gitattributes	…
.gitignore	…
.mailmap	…
COPYING	…
CREDITS	…
Kbuild	…
Kconfig	…
MAINTAINERS	counter: Internalize sysfs interface code	2023-04-20 12:13:55 +02:00
Makefile	Linux 5.15.111	2023-05-11 23:00:40 +09:00
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.