CVE-2024-26680

/// Technical description

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

net: atlantic: Fix DMA mapping for PTP hwts ring

Function aq_ring_hwts_rx_alloc() maps extra AQ_CFG_RXDS_DEF bytes

for PTP HWTS ring but then generic aq_ring_free() does not take this

into account.

Create and use a specific function to free HWTS ring to fix this

issue.

Trace:

[ 215.351607] ------------[ cut here ]------------

[ 215.351612] DMA-API: atlantic 0000:4b:00.0: device driver frees DMA memory with different size [device address=0x00000000fbdd0000] [map size=34816 bytes] [unmap size=32768 bytes]

[ 215.351635] WARNING: CPU: 33 PID: 10759 at kernel/dma/debug.c:988 check_unmap+0xa6f/0x2360

...

[ 215.581176] Call Trace:

[ 215.583632] <TASK>

[ 215.585745] ? show_trace_log_lvl+0x1c4/0x2df

[ 215.590114] ? show_trace_log_lvl+0x1c4/0x2df

[ 215.594497] ? debug_dma_free_coherent+0x196/0x210

[ 215.599305] ? check_unmap+0xa6f/0x2360

[ 215.603147] ? __warn+0xca/0x1d0

[ 215.606391] ? check_unmap+0xa6f/0x2

/// 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