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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Li Zhong <floridsleeves@gmail.com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
	Sasha Levin <sashal@kernel.org>,
	rafael@kernel.org, linux-acpi@vger.kernel.org
Subject: [PATCH AUTOSEL 6.1 05/22] ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value
Date: Sat, 17 Dec 2022 10:27:06 -0500	[thread overview]
Message-ID: <20221217152727.98061-5-sashal@kernel.org> (raw)
In-Reply-To: <20221217152727.98061-1-sashal@kernel.org>

From: Li Zhong <floridsleeves@gmail.com>

[ Upstream commit 2437513a814b3e93bd02879740a8a06e52e2cf7d ]

The return value of acpi_fetch_acpi_dev() could be NULL, which would
cause a NULL pointer dereference to occur in acpi_device_hid().

Signed-off-by: Li Zhong <floridsleeves@gmail.com>
[ rjw: Subject and changelog edits, added empty line after if () ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/acpi/processor_idle.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index acfabfe07c4f..fc5b5b2c9e81 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -1134,6 +1134,9 @@ 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))
-- 
2.35.1


  parent reply	other threads:[~2022-12-17 15:28 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-17 15:27 [PATCH AUTOSEL 6.1 01/22] fs: jfs: fix shift-out-of-bounds in dbAllocAG Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 02/22] udf: Avoid double brelse() in udf_rename() Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 03/22] jfs: Fix fortify moan in symlink Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 04/22] fs: jfs: fix shift-out-of-bounds in dbDiscardAG Sasha Levin
2022-12-17 15:27 ` Sasha Levin [this message]
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 06/22] ACPI: EC: Add quirk for the HP Pavilion Gaming 15-cx0041ur Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 07/22] ACPICA: Fix error code path in acpi_ds_call_control_method() Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 08/22] thermal/core: Ensure that thermal device is registered in thermal_zone_get_temp Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 09/22] ACPI: video: Change GIGABYTE GB-BXBT-2807 quirk to force_none Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 10/22] ACPI: video: Change Sony Vaio VPCEH3U1E quirk to force_native Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 11/22] ACPI: video: Add force_vendor quirk for Sony Vaio PCG-FRV35 Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 12/22] ACPI: video: Add force_native quirk for Sony Vaio VPCY11S1E Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 13/22] proc/vmcore: fix potential memory leak in vmcore_init() Sasha Levin
2022-12-17 15:27   ` Sasha Levin
2022-12-18  0:32   ` Andrew Morton
2022-12-18  0:32     ` Andrew Morton
2022-12-18 11:28     ` Sasha Levin
2022-12-18 11:28       ` Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 14/22] nilfs2: fix shift-out-of-bounds/overflow in nilfs_sb2_bad_offset() Sasha Levin
2022-12-17 15:27   ` Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 15/22] nilfs2: fix shift-out-of-bounds due to too large exponent of block size Sasha Levin
2022-12-17 15:27   ` Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 16/22] ACPI / PCI: fix LPIC IRQ model default PCI IRQ polarity Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 17/22] acct: fix potential integer overflow in encode_comp_t() Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 18/22] x86/apic: Handle no CONFIG_X86_X2APIC on systems with x2APIC enabled by BIOS Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 19/22] ACPI: x86: Add skip i2c clients quirk for Lenovo Yoga Tab 3 Pro (YT3-X90F) Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 20/22] btrfs: do not panic if we can't allocate a prealloc extent state Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 21/22] ACPI: x86: Add skip i2c clients quirk for Medion Lifetab S10346 Sasha Levin
2022-12-17 15:27 ` [PATCH AUTOSEL 6.1 22/22] hfs: fix OOB Read in __hfs_brec_find Sasha Levin

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