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Filename Latest commit message Latest commit date
Hans de Goede a826af1dea ACPI: scan: Make acpi_bus_get_device() clear return pointer on error
commit 78a18fec5258c8df9435399a1ea022d73d3eceb9 upstream.

Set the acpi_device pointer which acpi_bus_get_device() returns-by-
reference to NULL on errors.

We've recently had 2 cases where callers of acpi_bus_get_device()
did not properly error check the return value, so set the returned-
by-reference acpi_device pointer to NULL, because at least some
callers of acpi_bus_get_device() expect that to be done on errors.

[ rjw: This issue was exposed by commit 71da201f38df ("ACPI: scan:
  Defer enumeration of devices with _DEP lists") which caused it to
  be much more likely to occur on some systems, but the real defect
  had been introduced by an earlier commit. ]

Fixes: 40e7fcb192 ("ACPI: Add _DEP support to fix battery issue on Asus T100TA")
Fixes: bcfcd409d4 ("usb: split code locating ACPI companion into port and device")
Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Diagnosed-by: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Cc: All applicable <stable@vger.kernel.org>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-01-27 11:47:40 +01:00
arch
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Documentation
drivers ACPI: scan: Make acpi_bus_get_device() clear return pointer on error 2021-01-27 11:47:40 +01:00
fs nfsd4: readdirplus shouldn't return parent of export 2021-01-23 15:57:56 +01:00
include net: skbuff: disambiguate argument and member for skb_list_walk_safe helper 2021-01-23 15:57:57 +01:00
init
ipc
kernel bpf: Fix helper bpf_map_peek_elem_proto pointing to wrong callback 2021-01-23 15:57:56 +01:00
lib
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mm mm, slub: consider rest of partial list if acquire_slab() fails 2021-01-19 18:26:18 +01:00
net mac80211: check if atf has been disabled in __ieee80211_schedule_txq 2021-01-23 15:58:00 +01:00
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sound ALSA: hda/via: Add minimum mute flag 2021-01-27 11:47:40 +01:00
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Makefile Linux 5.4.92 2021-01-23 15:58:01 +01:00
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.