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Filename Latest commit message Latest commit date
Xin Liu c229821510 bpf, sockmap: fix deadlocks in the sockhash and sockmap 
[ Upstream commit ed17aa92dc56b6d8883e4b7a8f1c6fbf5ed6cd29 ]

When huang uses sched_switch tracepoint, the tracepoint
does only one thing in the mounted ebpf program, which
deletes the fixed elements in sockhash ([0])

It seems that elements in sockhash are rarely actively
deleted by users or ebpf program. Therefore, we do not
pay much attention to their deletion. Compared with hash
maps, sockhash only provides spin_lock_bh protection.
This causes it to appear to have self-locking behavior
in the interrupt context.

  [0]:https://lore.kernel.org/all/CABcoxUayum5oOqFMMqAeWuS8+EzojquSOSyDA3J_2omY=2EeAg@mail.gmail.com/

Reported-by: Hsin-Wei Hung <hsinweih@uci.edu>
Fixes: 604326b41a ("bpf, sockmap: convert to generic sk_msg interface")
Signed-off-by: Xin Liu <liuxin350@huawei.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/r/20230406122622.109978-1-liuxin350@huawei.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-05-17 11:35:43 +02:00
arch arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step 2023-05-17 11:35:39 +02:00
block
certs
crypto crypto: drbg - Only fail when jent is unavailable in FIPS mode 2023-05-17 11:35:42 +02:00
Documentation media: uapi: add MEDIA_BUS_FMT_METADATA_FIXED media bus format. 2023-05-17 11:35:36 +02:00
drivers scsi: lpfc: Fix ioremap issues in lpfc_sli4_pci_mem_setup() 2023-05-17 11:35:43 +02:00
fs f2fs: handle dqget error in f2fs_transfer_project_quota() 2023-05-17 11:35:42 +02:00
include scm: fix MSG_CTRUNC setting condition for SO_PASSSEC 2023-05-17 11:35:41 +02:00
init
ipc
kernel tick/common: Align tick period with the HZ tick. 2023-05-17 11:35:40 +02:00
lib debugobject: Prevent init race with static objects 2023-05-17 11:35:39 +02:00
LICENSES
mm mm/swap: fix swap_info_struct race between swapoff and get_swap_pages() 2023-04-20 12:07:35 +02:00
net bpf, sockmap: fix deadlocks in the sockhash and sockmap 2023-05-17 11:35:43 +02:00
samples
scripts ASN.1: Fix check for strdup() success 2023-04-26 11:24:06 +02:00
security selinux: ensure av_permissions.h is built when needed 2023-05-17 11:35:34 +02:00
sound ASoC: Intel: bytcr_rt5640: Add quirk for the Acer Iconia One 7 B1-750 2023-05-17 11:35:31 +02:00
tools bpftool: Fix bug for long instructions in program CFG dumps 2023-05-17 11:35:42 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
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COPYING
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Kbuild
Kconfig
MAINTAINERS
Makefile Linux 5.4.242 2023-04-26 11:24:06 +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.