GitHub-Mirror/Star64_linux

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Guenter Roeck 88d02c9ba2 usb: typec: tcpm: Ignore unsupported/unknown alternate mode requests TCPM may receive PD messages associated with unknown or unsupported alternate modes. If that happens, calls to typec_match_altmode() will return NULL. The tcpm code does not currently take this into account. This results in crashes. Unable to handle kernel NULL pointer dereference at virtual address 000001f0 pgd = 41dad9a1 [000001f0] *pgd=00000000 Internal error: Oops: 5 [#1] THUMB2 Modules linked in: tcpci tcpm CPU: 0 PID: 2338 Comm: kworker/u2:0 Not tainted 5.1.18-sama5-armv7-r2 #6 Hardware name: Atmel SAMA5 Workqueue: 2-0050 tcpm_pd_rx_handler [tcpm] PC is at typec_altmode_attention+0x0/0x14 LR is at tcpm_pd_rx_handler+0xa3b/0xda0 [tcpm] ... [<c03fbee8>] (typec_altmode_attention) from [<bf8030fb>] (tcpm_pd_rx_handler+0xa3b/0xda0 [tcpm]) [<bf8030fb>] (tcpm_pd_rx_handler [tcpm]) from [<c012082b>] (process_one_work+0x123/0x2a8) [<c012082b>] (process_one_work) from [<c0120a6d>] (worker_thread+0xbd/0x3b0) [<c0120a6d>] (worker_thread) from [<c012431f>] (kthread+0xcf/0xf4) [<c012431f>] (kthread) from [<c01010f9>] (ret_from_fork+0x11/0x38) Ignore PD messages if the associated alternate mode is not supported. Fixes: `e9576fe8e6` ("usb: typec: tcpm: Support for Alternate Modes") Cc: stable <stable@vger.kernel.org> Reported-by: Douglas Gilbert <dgilbert@interlog.com> Cc: Douglas Gilbert <dgilbert@interlog.com> Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Tested-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/1564761822-13984-1-git-send-email-linux@roeck-us.net Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-08-02 18:18:10 +02:00
arch	SPDX fixes for 5.3-rc2	2019-07-28 10:00:06 -07:00
block	for-linus-20190726-2	2019-07-26 19:20:34 -07:00
certs
crypto
Documentation	USB fixes for 5.3-rc2	2019-07-28 09:52:35 -07:00
drivers	usb: typec: tcpm: Ignore unsupported/unknown alternate mode requests	2019-08-02 18:18:10 +02:00
fs	SPDX fixes for 5.3-rc2	2019-07-28 10:00:06 -07:00
include	TTY fixes for 5.3-rc2	2019-07-28 10:18:33 -07:00
init
ipc
kernel	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-27 21:22:33 -07:00
lib	test_firmware: fix a memory leak bug	2019-07-25 14:39:52 +02:00
LICENSES
mm
net
samples	treewide: remove SPDX "WITH Linux-syscall-note" from kernel-space headers again	2019-07-25 11:05:10 +02:00
scripts	Kbuild fixes for v5.3	2019-07-28 10:35:04 -07:00
security	meminit fix	2019-07-28 12:33:15 -07:00
sound	sound fixes for 5.3-rc2	2019-07-26 10:23:45 -07:00
tools	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-27 21:17:56 -07:00
usr
virt	Documentation: move Documentation/virtual to Documentation/virt	2019-07-24 10:52:11 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore	.gitignore: Add compilation database file	2019-07-27 12:18:19 +09:00
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS	Char/Misc driver fixes for 5.3-rc2	2019-07-28 10:26:10 -07:00
Makefile	Linux 5.3-rc2	2019-07-28 12:47:02 -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.