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Filename Latest commit message Latest commit date
Daniel Jordan 1ed7508e68 module: statically initialize init section freeing data 
[ Upstream commit fdf09ab887829cd1b671e45d9549f8ec1ffda0fa ]

Corentin hit the following workqueue warning when running with
CRYPTO_MANAGER_EXTRA_TESTS:

  WARNING: CPU: 2 PID: 147 at kernel/workqueue.c:1473 __queue_work+0x3b8/0x3d0
  Modules linked in: ghash_generic
  CPU: 2 PID: 147 Comm: modprobe Not tainted
      5.6.0-rc1-next-20200214-00068-g166c9264f0b1-dirty #545
  Hardware name: Pine H64 model A (DT)
  pc : __queue_work+0x3b8/0x3d0
  Call trace:
   __queue_work+0x3b8/0x3d0
   queue_work_on+0x6c/0x90
   do_init_module+0x188/0x1f0
   load_module+0x1d00/0x22b0

I wasn't able to reproduce on x86 or rpi 3b+.

This is

  WARN_ON(!list_empty(&work->entry))

from __queue_work(), and it happens because the init_free_wq work item
isn't initialized in time for a crypto test that requests the gcm
module.  Some crypto tests were recently moved earlier in boot as
explained in commit c4741b2305 ("crypto: run initcalls for generic
implementations earlier"), which went into mainline less than two weeks
before the Fixes commit.

Avoid the warning by statically initializing init_free_wq and the
corresponding llist.

Link: https://lore.kernel.org/lkml/20200217204803.GA13479@Red/
Fixes: 1a7b7d9220 ("modules: Use vmalloc special flag")
Reported-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Tested-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Tested-on: sun50i-h6-pine-h64
Tested-on: imx8mn-ddr4-evk
Tested-on: sun50i-a64-bananapi-m64
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-10-29 09:57:55 +01:00
arch powerpc/perf/hv-gpci: Fix starting index value 2020-10-29 09:57:51 +01:00
block blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue 2020-10-29 09:57:34 +01:00
certs
crypto crypto: algif_skcipher - EBUSY on aio should be an error 2020-10-29 09:57:30 +01:00
Documentation x86/fpu: Allow multiple bits in clearcpuid= parameter 2020-10-29 09:57:29 +01:00
drivers clk: mediatek: add UART0 clock support 2020-10-29 09:57:54 +01:00
fs ramfs: fix nommu mmap with gaps in the page cache 2020-10-29 09:57:53 +01:00
include PCI/IOV: Mark VFs as not implementing PCI_COMMAND_MEMORY 2020-10-29 09:57:54 +01:00
init kprobes: tracing/kprobes: Fix to kill kprobes on initmem after boot 2020-10-01 13:18:23 +02:00
ipc
kernel module: statically initialize init section freeing data 2020-10-29 09:57:55 +01:00
lib lib/crc32.c: fix trivial typo in preprocessor condition 2020-10-29 09:57:52 +01:00
LICENSES
mm mm/page_owner: change split_page_owner to take a count 2020-10-29 09:57:52 +01:00
net netfilter: nf_log: missing vlan offload tag and proto 2020-10-29 09:57:45 +01:00
samples bpf: Fix fds_example SIGSEGV error 2020-08-19 08:16:03 +02:00
scripts scripts/dtc: only append to HOST_EXTRACFLAGS instead of overwriting 2020-10-07 08:01:29 +02:00
security ima: Don't ignore errors from crypto_shash_update() 2020-10-29 09:57:28 +01:00
sound ASoC: fsl_sai: Instantiate snd_soc_dai_driver 2020-10-29 09:57:42 +01:00
tools selftests/powerpc: Fix eeh-basic.sh exit codes 2020-10-29 09:57:52 +01:00
usr
virt KVM: arm64: Assume write fault on S1PTW permission fault on instruction fetch 2020-10-01 13:18:25 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Documentation/llvm: add documentation on building w/ Clang/LLVM 2020-08-26 10:40:46 +02:00
Makefile Linux 5.4.72 2020-10-17 10:11:24 +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.