fix(ipc): guard LOG_D against null thread pointer in rt_susp_list_dequeue

[srpatcha]

Description

rt_susp_list_dequeue() can return RT_NULL when the suspend list is empty or when the dequeued thread has been cleaned up. The LOG_D call dereferences thread->parent.name unconditionally, causing a null pointer dereference crash when thread is NULL.

Changes

• src/ipc.c: Guard LOG_D with null check using ternary operator
• src/ipc.c: Fix typo in changelog comment (redesigen -> redesign)

Testing

• Existing IPC tests pass
• 1 file changed, 2 lines modified

Replaces #11337 (rebased onto current master to fix CI).

[github-actions]

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[github-actions]

📌 Code Review Assignment

🏷️ Tag: kernel

Reviewers: @GorrayLi @ReviewSun @hamburger-os @lianux-mm @wdfk-prog @xu18838022837

Changed Files (Click to expand)

• src/ipc.c

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📊 Current Review Status (Last Updated: 2026-06-17 14:30 CST)

• ⌛ @GorrayLi Pending Review
• ⌛ @ReviewSun Pending Review
• ⌛ @hamburger-os Pending Review
• ⌛ @lianux-mm Pending Review
• ⌛ @wdfk-prog Pending Review
• ⌛ @xu18838022837 Pending Review

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