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Hui Peng 19bce474c4 ALSA: usb-audio: Fix a stack buffer overflow bug in check_input_term
`check_input_term` recursively calls itself with input from
device side (e.g., uac_input_terminal_descriptor.bCSourceID)
as argument (id). In `check_input_term`, if `check_input_term`
is called with the same `id` argument as the caller, it triggers
endless recursive call, resulting kernel space stack overflow.

This patch fixes the bug by adding a bitmap to `struct mixer_build`
to keep track of the checked ids and stop the execution if some id
has been checked (similar to how parse_audio_unit handles unitid
argument).

Reported-by: Hui Peng <benquike@gmail.com>
Reported-by: Mathias Payer <mathias.payer@nebelwelt.net>
Signed-off-by: Hui Peng <benquike@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2019-08-15 21:48:52 +02:00
arch powerpc fixes for 5.2 #7 2019-06-30 11:20:52 +08:00
block
certs
crypto
Documentation Merge branch 'asoc-5.3' into asoc-next 2019-07-06 12:25:26 +01:00
drivers Merge branch 'asoc-5.3' into asoc-next 2019-07-06 12:25:26 +01:00
fs XArray updates for 5.2-rc6 2019-06-29 17:14:57 +08:00
include ASoC: Fixes for v5.3 2019-08-06 12:28:08 +02:00
init
ipc
kernel Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-06-30 11:19:17 +08:00
lib XArray updates for 5.2-rc6 2019-06-29 17:14:57 +08:00
LICENSES
mm
net
samples
scripts
security
sound ALSA: usb-audio: Fix a stack buffer overflow bug in check_input_term 2019-08-15 21:48:52 +02:00
tools Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-06-29 19:39:17 +08:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS ASoC: Fixes for v5.3 2019-08-06 12:28:08 +02:00
Makefile Linux 5.2-rc7 2019-06-30 11:25:36 +08:00
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.