Kernel panic via premature Coresight counter increments

A NULL-pointer dereference in Linux kernel Coresight 6.5 through 7.1.4 allows local users to panic the kernel during failed probing. The coresight_add_out_conn() and coresight_add_in_conn() paths increment connection counts before allocation succeeds, so coresight_release_platform_data() later dereferences a NULL or uninitialized entry while unwinding an allocation failure. Exploitation requires local low-privileged access, memory pressure timed with Coresight device probing on an affected ARM or ARM64 system, and results in a kernel panic.