Description

In the Linux kernel, the following vulnerability has been resolved: PCI/ASPM: Fix deadlock when enabling ASPM A last minute revert in 6.7-final introduced a potential deadlock when enabling ASPM during probe of Qualcomm PCIe controllers as reported by lockdep: ============================================ WARNING: possible recursive locking detected 6.7.0 #40 Not tainted -------------------------------------------- kworker/u16:5/90 is trying to acquire lock: ffffacfa78ced000 (pci_bus_sem){++++}-{3:3}, at: pcie_aspm_pm_state_change+0x58/0xdc but task is already holding lock: ffffacfa78ced000 (pci_bus_sem){++++}-{3:3}, at: pci_walk_bus+0x34/0xbc other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(pci_bus_sem); lock(pci_bus_sem); *** DEADLOCK *** Call trace: print_deadlock_bug+0x25c/0x348 __lock_acquire+0x10a4/0x2064 lock_acquire+0x1e8/0x318 down_read+0x60/0x184 pcie_aspm_pm_state_change+0x58/0xdc pci_set_full_power_state+0xa8/0x114 pci_set_power_state+0xc4/0x120 qcom_pcie_enable_aspm+0x1c/0x3c [pcie_qcom] pci_walk_bus+0x64/0xbc qcom_pcie_host_post_init_2_7_0+0x28/0x34 [pcie_qcom] The deadlock can easily be reproduced on machines like the Lenovo ThinkPad X13s by adding a delay to increase the race window during asynchronous probe where another thread can take a write lock. Add a new pci_set_power_state_locked() and associated helper functions that can be called with the PCI bus semaphore held to avoid taking the read lock twice.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score:  5.5 MEDIUM

Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://git.kernel.org/stable/c/0f7908a016c092cfdaa16d785fa5099d867bc1a3
https://git.kernel.org/stable/c/1e560864159d002b453da42bd2c13a1805515a20	Patch
https://git.kernel.org/stable/c/b0f4478838be1f1d330061201898fef65bf8fd7c
https://git.kernel.org/stable/c/ef90508574d7af48420bdc5f7b9a4f1cdd26bc70	Patch

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-667	Improper Locking	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

CVE Modified by kernel.org 4/28/2024 8:15:19 AM

Action	Type	Old Value	New Value
Added	Reference		kernel.org https://git.kernel.org/stable/c/0f7908a016c092cfdaa16d785fa5099d867bc1a3 [No types assigned]
Added	Reference		kernel.org https://git.kernel.org/stable/c/b0f4478838be1f1d330061201898fef65bf8fd7c [No types assigned]

Initial Analysis by NIST 4/17/2024 1:47:46 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7.0 up to (excluding) 6.7.5
Added	CVSS V3.1		NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Added	CWE		NIST CWE-667
Changed	Reference Type	https://git.kernel.org/stable/c/1e560864159d002b453da42bd2c13a1805515a20 No Types Assigned	https://git.kernel.org/stable/c/1e560864159d002b453da42bd2c13a1805515a20 Patch
Changed	Reference Type	https://git.kernel.org/stable/c/ef90508574d7af48420bdc5f7b9a4f1cdd26bc70 No Types Assigned	https://git.kernel.org/stable/c/ef90508574d7af48420bdc5f7b9a4f1cdd26bc70 Patch

New CVE Received by NIST 2/26/2024 11:28:00 AM

Action	Type	Old Value	New Value
Added	Description		Record truncated, showing 500 of 1615 characters. View Entire Change Record In the Linux kernel, the following vulnerability has been resolved: PCI/ASPM: Fix deadlock when enabling ASPM A last minute revert in 6.7-final introduced a potential deadlock when enabling ASPM during probe of Qualcomm PCIe controllers as reported by lockdep: ============================================ WARNING: possible recursive locking detected 6.7.0 #40 Not tainted -------------------------------------------- kworker/u16:5/90 is trying to acquire lock: ffffacfa78ced000 (pci_b
Added	Reference		Linux https://git.kernel.org/stable/c/1e560864159d002b453da42bd2c13a1805515a20 [No types assigned]
Added	Reference		Linux https://git.kernel.org/stable/c/ef90508574d7af48420bdc5f7b9a4f1cdd26bc70 [No types assigned]