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Filename Latest commit message Latest commit date
Ben Hutchings 15b3cd8ef4 Revert "consolemap: Fix a memory leaking bug in drivers/tty/vt/consolemap.c" 
This reverts commit 84ecc2f6eb.

con_insert_unipair() is working with a sparse 3-dimensional array:

- p->uni_pgdir[] is the top layer
- p1 points to a middle layer
- p2 points to a bottom layer

If it needs to allocate a new middle layer, and then fails to allocate
a new bottom layer, it would previously free only p2, and now it frees
both p1 and p2.  But since the new middle layer was already registered
in the top layer, it was not leaked.

However, if it looks up an *existing* middle layer and then fails to
allocate a bottom layer, it now frees both p1 and p2 but does *not*
free any other bottom layers under p1.  So it *introduces* a memory
leak.

The error path also cleared the wrong index in p->uni_pgdir[],
introducing a use-after-free.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Fixes: 84ecc2f6eb ("consolemap: Fix a memory leaking bug in drivers/tty/vt/consolemap.c")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-04 21:01:58 +02:00
arch Merge 5.2-rc3 into tty-next 2019-06-03 13:53:20 +02:00
block
certs
crypto
Documentation mm, memcg: consider subtrees in memory.events 2019-06-01 15:51:31 -07:00
drivers Revert "consolemap: Fix a memory leaking bug in drivers/tty/vt/consolemap.c" 2019-06-04 21:01:58 +02:00
fs for-linus-20190601 2019-06-02 09:27:44 -07:00
include Merge branch 'akpm' (patches from Andrew) 2019-06-02 08:51:30 -07:00
init
ipc
kernel Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-06-02 11:08:12 -07:00
lib SPDX fixes for 5.2-rc3, round 2 2019-06-02 10:22:38 -07:00
LICENSES
mm mm, compaction: make sure we isolate a valid PFN 2019-06-01 15:51:32 -07:00
net
samples
scripts Merge branch 'akpm' (patches from Andrew) 2019-06-02 08:51:30 -07:00
security
sound
tools Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-06-02 11:08:12 -07:00
usr
virt Fixes for PPC and s390. 2019-06-02 10:19:39 -07:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
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COPYING
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Kbuild
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MAINTAINERS Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2019-06-02 10:18:11 -07:00
Makefile Linux 5.2-rc3 2019-06-02 13:55:33 -07:00
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.