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Kernel: Don't kmalloc() for small (<=1024) dbgputstr() syscalls
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f4090d46de
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sideshowbarker
2024-07-18 11:27:52 +09:00
Author: https://github.com/awesomekling Commit: https://github.com/SerenityOS/serenity/commit/f4090d46de6
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@ -28,10 +28,18 @@ KResultOr<size_t> Process::sys$dbgputstr(Userspace<const u8*> characters, size_t
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if (size == 0)
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return 0;
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if (size <= 1024) {
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char buffer[1024];
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if (!copy_from_user(buffer, characters, size))
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return EFAULT;
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dbgputstr(buffer, size);
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return size;
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}
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auto result = try_copy_kstring_from_user(reinterpret_cast<char const*>(characters.unsafe_userspace_ptr()), size);
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if (result.is_error())
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return result.error();
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dbgputstr(reinterpret_cast<const char*>(result.value()->characters()), size);
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dbgputstr(result.value()->characters(), size);
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return size;
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}
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