Claude review: drm/xe: use krealloc_array to prevent integer overflow

[Claude Code Review Bot <claude-review@example.com>]

Overall Series Review

Subject: drm/xe: use krealloc_array to prevent integer overflow
Author: "Baoli.Zhang" <baoli.zhang@linux.intel.com>
Patches: 1
Reviewed: 2026-04-12T11:54:39.270190

---

This is a single patch (v2) that mechanically replaces `krealloc()` with `krealloc_array()` in two xe driver files to leverage the built-in overflow checking in `krealloc_array()`. The change is correct, low-risk, and follows established kernel conventions. The kernel provides `krealloc_array()` specifically for this pattern — separating count from element size so the allocator can check for multiplication overflow internally.

The practical overflow risk here is low (especially in `xe_vm_madvise.c` where `max_vmas` starts at 8 and doubles, so it would OOM long before overflowing), but using the safe API is the right thing to do as a defense-in-depth measure. In `xe_configfs.c`, `count` is a `ssize_t` derived from user-supplied configfs input, so the overflow protection is slightly more meaningful there.

**Verdict: Looks good.** Minor nits below but nothing blocking.

---
Generated by Claude Code Patch Reviewer