From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Hans de Goede <hdegoede@redhat.com>,
Sasha Levin <sashal@kernel.org>,
robert.moore@intel.com, linux-acpi@vger.kernel.org,
devel@acpica.org
Subject: [PATCH AUTOSEL 5.4 11/16] ACPICA: Avoid walking the ACPI Namespace if it is not there
Date: Mon, 28 Mar 2022 07:23:40 -0400 [thread overview]
Message-ID: <20220328112345.1556601-11-sashal@kernel.org> (raw)
In-Reply-To: <20220328112345.1556601-1-sashal@kernel.org>
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
[ Upstream commit 0c9992315e738e7d6e927ef36839a466b080dba6 ]
ACPICA commit b1c3656ef4950098e530be68d4b589584f06cddc
Prevent acpi_ns_walk_namespace() from crashing when called with
start_node equal to ACPI_ROOT_OBJECT if the Namespace has not been
instantiated yet and acpi_gbl_root_node is NULL.
For instance, this can happen if the kernel is run with "acpi=off"
in the command line.
Link: https://github.com/acpica/acpica/commit/b1c3656ef4950098e530be68d4b589584f06cddc
Link: https://lore.kernel.org/linux-acpi/CAJZ5v0hJWW_vZ3wwajE7xT38aWjY7cZyvqMJpXHzUL98-SiCVQ@mail.gmail.com/
Reported-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/acpi/acpica/nswalk.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/acpi/acpica/nswalk.c b/drivers/acpi/acpica/nswalk.c
index ceea6af79d12..bf4eb642f423 100644
--- a/drivers/acpi/acpica/nswalk.c
+++ b/drivers/acpi/acpica/nswalk.c
@@ -169,6 +169,9 @@ acpi_ns_walk_namespace(acpi_object_type type,
if (start_node == ACPI_ROOT_OBJECT) {
start_node = acpi_gbl_root_node;
+ if (!start_node) {
+ return_ACPI_STATUS(AE_NO_NAMESPACE);
+ }
}
/* Null child means "get first node" */
--
2.34.1
next prev parent reply other threads:[~2022-03-28 11:29 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-28 11:23 [PATCH AUTOSEL 5.4 01/16] LSM: general protection fault in legacy_parse_param Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 02/16] gcc-plugins/stackleak: Exactly match strings instead of prefixes Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 03/16] pinctrl: npcm: Fix broken references to chip->parent_device Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 04/16] block, bfq: don't move oom_bfqq Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 05/16] selinux: use correct type for context length Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 06/16] loop: use sysfs_emit() in the sysfs xxx show() Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 07/16] Fix incorrect type in assignment of ipv6 port for audit Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 08/16] irqchip/qcom-pdc: Fix broken locking Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 09/16] irqchip/nvic: Release nvic_base upon failure Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 10/16] bfq: fix use-after-free in bfq_dispatch_request Sasha Levin
2022-03-28 11:23 ` Sasha Levin [this message]
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 12/16] lib/raid6/test/Makefile: Use $(pound) instead of \# for Make 4.3 Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 13/16] Revert "Revert "block, bfq: honor already-setup queue merges"" Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 14/16] ACPI/APEI: Limit printable size of BERT table data Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 15/16] PM: core: keep irq flags in device_pm_check_callbacks() Sasha Levin
2022-03-28 11:23 ` [PATCH AUTOSEL 5.4 16/16] spi: tegra20: Use of_device_get_match_data() Sasha Levin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220328112345.1556601-11-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=devel@acpica.org \
--cc=hdegoede@redhat.com \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rafael.j.wysocki@intel.com \
--cc=robert.moore@intel.com \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).