CVE-2024-57921

/// Technical description

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

drm/amdgpu: Add a lock when accessing the buddy trim function

When running YouTube videos and Steam games simultaneously,

the tester found a system hang / race condition issue with

the multi-display configuration setting. Adding a lock to

the buddy allocator's trim function would be the solution.

<log snip>

[ 7197.250436] general protection fault, probably for non-canonical address 0xdead000000000108

[ 7197.250447] RIP: 0010:__alloc_range+0x8b/0x340 [amddrm_buddy]

[ 7197.250470] Call Trace:

[ 7197.250472] <TASK>

[ 7197.250475] ? show_regs+0x6d/0x80

[ 7197.250481] ? die_addr+0x37/0xa0

[ 7197.250483] ? exc_general_protection+0x1db/0x480

[ 7197.250488] ? drm_suballoc_new+0x13c/0x93d [drm_suballoc_helper]

[ 7197.250493] ? asm_exc_general_protection+0x27/0x30

[ 7197.250498] ? __alloc_range+0x8b/0x340 [amddrm_buddy]

[ 7197.250501] ? __alloc_range+0x109/0x340 [amddrm_buddy]

[ 7197.250506] amddrm_buddy_block_trim+0

/// 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