CVE-2024-56568 Affecting kernel-zfcpdump-modules package, versions *
Threat Intelligence
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Test your applications- Snyk IDSNYK-RHEL8-KERNELZFCPDUMPMODULES-8583201
- published31 Dec 2024
- disclosed27 Dec 2024
Introduced: 27 Dec 2024
NewCVE-2024-56568 (opens in a new tab)How to fix?
There is no fixed version for RHEL:8 kernel-zfcpdump-modules.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-zfcpdump-modules package and not the kernel-zfcpdump-modules package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
iommu/arm-smmu: Defer probe of clients after smmu device bound
Null pointer dereference occurs due to a race between smmu driver probe and client driver probe, when of_dma_configure() for client is called after the iommu_device_register() for smmu driver probe has executed but before the driver_bound() for smmu driver has been called.
Following is how the race occurs:
T1:Smmu device probe T2: Client device probe
really_probe() arm_smmu_device_probe() iommu_device_register() really_probe() platform_dma_configure() of_dma_configure() of_dma_configure_id() of_iommu_configure() iommu_probe_device() iommu_init_device() arm_smmu_probe_device() arm_smmu_get_by_fwnode() driver_find_device_by_fwnode() driver_find_device() next_device() klist_next() /* null ptr assigned to smmu / / null ptr dereference while smmu->streamid_mask */ driver_bound() klist_add_tail()
When this null smmu pointer is dereferenced later in arm_smmu_probe_device, the device crashes.
Fix this by deferring the probe of the client device until the smmu device has bound to the arm smmu driver.
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References
- https://access.redhat.com/security/cve/CVE-2024-56568
- https://git.kernel.org/stable/c/229e6ee43d2a160a1592b83aad620d6027084aad
- https://git.kernel.org/stable/c/4a9485918a042e3114890dfbe19839a1897f8b2c
- https://git.kernel.org/stable/c/5018696b19bc6c021e934a8a59f4b1dd8c0ac9f8
- https://git.kernel.org/stable/c/c2527d07c7e9cda2c6165d5edccf74752baac1b0
- https://git.kernel.org/stable/c/dc02407ea952e20c544a078a6be2e6f008327973
- https://git.kernel.org/stable/c/f8f794f387ad21c4696e5cd0626cb6f8a5f6aea5