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Kernel: Add crash logging heuristic for uninitialized kmalloc()/kfree()
Since we scrub both kmalloc() and kfree() with predictable values, we can log a helpful message when hitting a crash that looks like it might be a dereference of such scrubbed data.
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3 changed files with 11 additions and 2 deletions
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//#define KMALLOC_DEBUG_LARGE_ALLOCATIONS
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#define KMALLOC_SCRUB_BYTE 0xbb
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#define KFREE_SCRUB_BYTE 0xaa
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void kmalloc_init();
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[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] void* kmalloc_impl(size_t);
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[[gnu::malloc, gnu::returns_nonnull, gnu::alloc_size(1)]] void* kmalloc_eternal(size_t);
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