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Filename Latest commit message Latest commit date
Borislav Petkov de2cce5ae5 x86/mce/amd: Publish the bank pointer only after setup has succeeded
commit 6e5cf31fbe651bed7ba1df768f2e123531132417 upstream.

threshold_create_bank() creates a bank descriptor per MCA error
thresholding counter which can be controlled over sysfs. It publishes
the pointer to that bank in a per-CPU variable and then goes on to
create additional thresholding blocks if the bank has such.

However, that creation of additional blocks in
allocate_threshold_blocks() can fail, leading to a use-after-free
through the per-CPU pointer.

Therefore, publish that pointer only after all blocks have been setup
successfully.

Fixes: 019f34fccf ("x86, MCE, AMD: Move shared bank to node descriptor")
Reported-by: Saar Amar <Saar.Amar@microsoft.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200128140846.phctkvx5btiexvbx@kili.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-28 17:22:18 +01:00
arch x86/mce/amd: Publish the bank pointer only after setup has succeeded 2020-02-28 17:22:18 +01:00
block
certs
crypto crypto: essiv - fix AEAD capitalization and preposition use in help text 2020-02-24 08:36:50 +01:00
Documentation fbdev: fix numbering of fbcon options 2020-02-24 08:36:42 +01:00
drivers drm/panfrost: perfcnt: Reserve/use the AS attached to the perfcnt MMU context 2020-02-28 17:22:17 +01:00
fs jbd2: fix ocfs2 corrupt when clearing block group bits 2020-02-28 17:22:18 +01:00
include USB: core: add endpoint-blacklist quirk 2020-02-28 17:22:16 +01:00
init
ipc
kernel trigger_next should increase position index 2020-02-24 08:36:59 +01:00
lib lib/scatterlist.c: adjust indentation in __sg_alloc_table 2020-02-24 08:37:00 +01:00
LICENSES
mm
net sunrpc: Fix potential leaks in sunrpc_cache_unhash() 2020-02-24 08:36:55 +01:00
samples samples/bpf: Set -fno-stack-protector when building BPF programs 2020-02-24 08:36:36 +01:00
scripts bpf, btf: Always output invariant hit in pahole DWARF to BTF transform 2020-02-24 08:36:55 +01:00
security selinux: ensure we cleanup the internal AVC counters on error in avc_update() 2020-02-24 08:36:39 +01:00
sound ASoC: sun8i-codec: Fix setting DAI data format 2020-02-28 17:22:13 +01:00
tools selftests/eeh: Bump EEH wait time to 60s 2020-02-24 08:36:57 +01:00
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Makefile Linux 5.4.22 2020-02-24 08:37:04 +01:00
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.