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Filename Latest commit message Latest commit date
Paul Moore 37f4c27752 audit: fix error handling in audit_data_to_entry() 
commit 2ad3e17ebf94b7b7f3f64c050ff168f9915345eb upstream.

Commit 219ca39427 ("audit: use union for audit_field values since
they are mutually exclusive") combined a number of separate fields in
the audit_field struct into a single union.  Generally this worked
just fine because they are generally mutually exclusive.
Unfortunately in audit_data_to_entry() the overlap can be a problem
when a specific error case is triggered that causes the error path
code to attempt to cleanup an audit_field struct and the cleanup
involves attempting to free a stored LSM string (the lsm_str field).
Currently the code always has a non-NULL value in the
audit_field.lsm_str field as the top of the for-loop transfers a
value into audit_field.val (both .lsm_str and .val are part of the
same union); if audit_data_to_entry() fails and the audit_field
struct is specified to contain a LSM string, but the
audit_field.lsm_str has not yet been properly set, the error handling
code will attempt to free the bogus audit_field.lsm_str value that
was set with audit_field.val at the top of the for-loop.

This patch corrects this by ensuring that the audit_field.val is only
set when needed (it is cleared when the audit_field struct is
allocated with kcalloc()).  It also corrects a few other issues to
ensure that in case of error the proper error code is returned.

Cc: stable@vger.kernel.org
Fixes: 219ca39427 ("audit: use union for audit_field values since they are mutually exclusive")
Reported-by: syzbot+1f4d90ead370d72e450b@syzkaller.appspotmail.com
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-03-05 16:43:42 +01:00
arch ARM: dts: sti: fixup sound frame-inversion for stihxxx-b2120.dtsi 2020-03-05 16:43:38 +01:00
block
certs
crypto crypto: rename sm3-256 to sm3 in hash_algo_name 2020-02-28 17:22:26 +01:00
Documentation mm: Avoid creating virtual address aliases in brk()/mmap()/mremap() 2020-02-28 17:22:21 +01:00
drivers nvme/pci: move cqe check after device shutdown 2020-03-05 16:43:41 +01:00
fs ext4: potential crash on allocation error in ext4_alloc_flex_bg_array() 2020-03-05 16:43:41 +01:00
include timers/nohz: Update NOHZ load in remote tick 2020-03-05 16:43:36 +01:00
init
ipc Revert "ipc,sem: remove uneeded sem_undo_list lock usage in exit_sem()" 2020-02-28 17:22:20 +01:00
kernel audit: fix error handling in audit_data_to_entry() 2020-03-05 16:43:42 +01:00
lib lib/stackdepot.c: fix global out-of-bounds in stack_slabs 2020-02-28 17:22:20 +01:00
LICENSES
mm mm: Avoid creating virtual address aliases in brk()/mmap()/mremap() 2020-02-28 17:22:21 +01:00
net mac80211: fix wrong 160/80+80 MHz setting 2020-03-05 16:43:41 +01:00
samples
scripts
security
sound ASoC: SOF: Intel: hda: Add iDisp4 DAI 2020-02-28 17:22:29 +01:00
tools ipv6: Fix route replacement with dev-only route 2020-03-05 16:43:35 +01:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: Update drm/i915 bug filing URL 2020-02-28 17:22:19 +01:00
Makefile Linux 5.4.23 2020-02-28 17:22:29 +01:00
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.