cbcvebase.
CVE-2024-26605
published 2024-02-26

CVE-2024-26605: 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…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.21%
11.0th percentile
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.

Affected

14 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.90-1 (bookworm)linux 6.1.90-1 (bookworm)
linuxlinux——
linuxlinux——
linuxlinux>= 5.15.147 < 5.165.16
linuxlinux>= 6.1.72 < 6.1.886.1.88
linuxlinux>= 6.6.11 < 6.6.296.6.29
linuxlinux>= 8cc22ba3f77c59df5f1ac47d62df51efb28cd868 < b0f4478838be1f1d330061201898fef65bf8fd7cb0f4478838be1f1d330061201898fef65bf8fd7c
linuxlinux>= b9c370b61d735a0e5390c42771e7eb21413f7868 < 0f7908a016c092cfdaa16d785fa5099d867bc1a30f7908a016c092cfdaa16d785fa5099d867bc1a3
linuxlinux>= f93e71aea6c60ebff8adbd8941e678302d377869 < ef90508574d7af48420bdc5f7b9a4f1cdd26bc70ef90508574d7af48420bdc5f7b9a4f1cdd26bc70
linuxlinux>= f93e71aea6c60ebff8adbd8941e678302d377869 < 1e560864159d002b453da42bd2c13a1805515a201e560864159d002b453da42bd2c13a1805515a20
linuxlinux_kernel>= 0 < 6.1.90-16.1.90-1
linuxlinux_kernel>= 0 < 6.7.7-16.7.7-1
linuxlinux_kernel>= 0 < 6.7.7-16.7.7-1
linuxlinux_kernel>= 6.7.0 < 6.7.56.7.5

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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