CVE - CVE-2024-46750

CVE-ID
CVE-2024-46750	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: PCI: Add missing bridge lock to pci_bus_lock() One of the true positives that the cfg_access_lock lockdep effort identified is this sequence: WARNING: CPU: 14 PID: 1 at drivers/pci/pci.c:4886 pci_bridge_secondary_bus_reset+0x5d/0x70 RIP: 0010:pci_bridge_secondary_bus_reset+0x5d/0x70 Call Trace: <TASK> ? __warn+0x8c/0x190 ? pci_bridge_secondary_bus_reset+0x5d/0x70 ? report_bug+0x1f8/0x200 ? handle_bug+0x3c/0x70 ? exc_invalid_op+0x18/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? pci_bridge_secondary_bus_reset+0x5d/0x70 pci_reset_bus+0x1d8/0x270 vmd_probe+0x778/0xa10 pci_device_probe+0x95/0x120 Where pci_reset_bus() users are triggering unlocked secondary bus resets. Ironically pci_bus_reset(), several calls down from pci_reset_bus(), uses pci_bus_lock() before issuing the reset which locks everything but the bridge itself. For the same motivation as adding: bridge = pci_upstream_bridge(dev); if (bridge) pci_dev_lock(bridge); to pci_reset_function() for the "bus" and "cxl_bus" reset cases, add pci_dev_lock() for @bus->self to pci_bus_lock(). [bhelgaas: squash in recursive locking deadlock fix from Keith Busch: https://lore.kernel.org/r/20240711193650.701834-1-kbusch@meta.com]
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945 URL:https://git.kernel.org/stable/c/04e85a3285b0e5c5af6fd2c0fd6e95ffecc01945 MISC:https://git.kernel.org/stable/c/0790b89c7e911003b8c50ae50e3ac7645de1fae9 URL:https://git.kernel.org/stable/c/0790b89c7e911003b8c50ae50e3ac7645de1fae9 MISC:https://git.kernel.org/stable/c/7253b4fed46471cc247c6cacefac890a8472c083 URL:https://git.kernel.org/stable/c/7253b4fed46471cc247c6cacefac890a8472c083 MISC:https://git.kernel.org/stable/c/78c6e39fef5c428960aff742149bba302dd46f5a URL:https://git.kernel.org/stable/c/78c6e39fef5c428960aff742149bba302dd46f5a MISC:https://git.kernel.org/stable/c/81c68e218ab883dfa368460a59b674084c0240da URL:https://git.kernel.org/stable/c/81c68e218ab883dfa368460a59b674084c0240da MISC:https://git.kernel.org/stable/c/a4e772898f8bf2e7e1cf661a12c60a5612c4afab URL:https://git.kernel.org/stable/c/a4e772898f8bf2e7e1cf661a12c60a5612c4afab MISC:https://git.kernel.org/stable/c/df77a678c33871a6e4ac5b54a71662f1d702335b URL:https://git.kernel.org/stable/c/df77a678c33871a6e4ac5b54a71662f1d702335b MISC:https://git.kernel.org/stable/c/e2355d513b89a2cb511b4ded0deb426cdb01acd0 URL:https://git.kernel.org/stable/c/e2355d513b89a2cb511b4ded0deb426cdb01acd0
Assigning CNA
kernel.org
Date Record Created
20240911	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240911)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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