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Filename Latest commit message Latest commit date
Roberto Sassu 1066327bf9 evm: Check also if *tfm is an error pointer in init_desc() 
[ Upstream commit 53de3b080d5eae31d0de219617155dcc34e7d698 ]

This patch avoids a kernel panic due to accessing an error pointer set by
crypto_alloc_shash(). It occurs especially when there are many files that
require an unsupported algorithm, as it would increase the likelihood of
the following race condition:

Task A: *tfm = crypto_alloc_shash() <= error pointer
Task B: if (*tfm == NULL) <= *tfm is not NULL, use it
Task B: rc = crypto_shash_init(desc) <= panic
Task A: *tfm = NULL

This patch uses the IS_ERR_OR_NULL macro to determine whether or not a new
crypto context must be created.

Cc: stable@vger.kernel.org
Fixes: d46eb36995 ("evm: crypto hash replaced by shash")
Co-developed-by: Krzysztof Struczynski <krzysztof.struczynski@huawei.com>
Signed-off-by: Krzysztof Struczynski <krzysztof.struczynski@huawei.com>
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-05-27 17:46:08 +02:00
arch KVM: SVM: Fix potential memory leak in svm_cpu_init() 2020-05-27 17:46:08 +02:00
block
certs
crypto gcc-10: avoid shadowing standard library 'free()' in crypto 2020-05-20 08:20:29 +02:00
Documentation
drivers i2c: dev: Fix the race between the release of i2c_dev and cdev 2020-05-27 17:46:07 +02:00
fs fanotify: fix merging marks masks with FAN_ONDIR 2020-05-20 08:20:35 +02:00
include SUNRPC: Revert 241b1f419f ("SUNRPC: Remove xdr_buf_trim()") 2020-05-20 08:20:39 +02:00
init x86: Fix early boot crash on gcc-10, third try 2020-05-20 08:20:34 +02:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2020-05-20 08:20:16 +02:00
kernel Stop the ad-hoc games with -Wno-maybe-initialized 2020-05-20 08:20:28 +02:00
lib
LICENSES
mm shmem: fix possible deadlocks on shmlock_user_lock 2020-05-20 08:20:03 +02:00
net bpf: Fix sk_psock refcnt leak when receiving message 2020-05-20 08:20:39 +02:00
samples
scripts
security evm: Check also if *tfm is an error pointer in init_desc() 2020-05-27 17:46:08 +02:00
sound Revert "ALSA: hda/realtek: Fix pop noise on ALC225" 2020-05-20 08:20:36 +02:00
tools bpf: Test_progs, fix test_get_stack_rawtp_err.c build 2020-05-20 08:20:41 +02:00
usr
virt KVM: arm: vgic: Synchronize the whole guest on GIC{D,R}_I{S,C}ACTIVER read 2020-05-20 08:20:04 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile Linux 5.4.42 2020-05-20 08:20:41 +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.