From: Li Zhong <floridsleeves@gmail.com>
To: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org
Cc: rafael@kernel.org, lenb@kernel.org, Li Zhong <floridsleeves@gmail.com>
Subject: [PATCH v1] drivers/acpi/processor_idle: check the return value of acpi_fetch_acpi_dev()
Date: Sun, 28 Aug 2022 13:54:16 -0700 [thread overview]
Message-ID: <20220828205416.1957305-1-floridsleeves@gmail.com> (raw)
The return value of acpi_fetch_acpi_dev() could be NULL, which will
cause null pointer dereference if used in acpi_device_hid().
Signed-off-by: Li Zhong <floridsleeves@gmail.com>
---
drivers/acpi/processor_idle.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 16a1663d02d4..519f8f741da3 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1117,6 +1117,8 @@ static int acpi_processor_get_lpi_info(struct acpi_processor *pr)
status = acpi_get_parent(handle, &pr_ahandle);
while (ACPI_SUCCESS(status)) {
d = acpi_fetch_acpi_dev(pr_ahandle);
+ if (!d)
+ break;
handle = pr_ahandle;
if (strcmp(acpi_device_hid(d), ACPI_PROCESSOR_CONTAINER_HID))
--
2.25.1
next reply other threads:[~2022-08-28 20:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-28 20:54 Li Zhong [this message]
2022-08-29 13:56 ` Rafael J. Wysocki
2022-09-03 23:03 ` Li Zhong
2022-09-10 16:10 ` Rafael J. Wysocki
2022-09-02 7:37 Li Zhong
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=20220828205416.1957305-1-floridsleeves@gmail.com \
--to=floridsleeves@gmail.com \
--cc=lenb@kernel.org \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rafael@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
all inboxes | Powered by JetHome®