CVE-2024-56588

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

scsi: hisi_sas: Create all dump files during debugfs initialization

For the current debugfs of hisi_sas, after user triggers dump, the

driver allocate memory space to save the register information and create

debugfs files to display the saved information. In this process, the

debugfs files created after each dump.

Therefore, when the dump is triggered while the driver is unbind, the

following hang occurs:

[67840.853907] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a0

[67840.862947] Mem abort info:

[67840.865855] ESR = 0x0000000096000004

[67840.869713] EC = 0x25: DABT (current EL), IL = 32 bits

[67840.875125] SET = 0, FnV = 0

[67840.878291] EA = 0, S1PTW = 0

[67840.881545] FSC = 0x04: level 0 translation fault

[67840.886528] Data abort info:

[67840.889524] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000

[67840.895117] CM = 0, WnR = 0, TnD = 0, TagAccess = 0

[67840.9002

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References