CVE-2025-39683 tracing: Limit access to parser->buffer when trace_get_user failed

In the Linux kernel, the following vulnerability has been resolved: tracing: Limit access to parser-buffer when tracegetuser failed When the length of the string written to setftracefilter exceeds FTRACEBUFFMAX, the following KASAN alarm will be triggered: BUG: KASAN: slab-out-of-bounds in...