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<think>
Okay, I need to classify this bug report into one of the given categories. Let me start by reading the problem description carefully.
The log message is from QEMU, specifically in the file qemu/hw/sd/sdhci.c at line 476. The function sdhci_read_dataport() is failing an assertion: `s->data_count < s->buf_maxsz` is not true. This results in an aborted program.
First, I'll consider what this function does. SDHCI (Secure Digital Host Controller Interface) is related to handling SD cards in QEMU's emulated hardware. The function name suggests it reads data from a port, likely part of the device emulation for storage devices like SD cards.
The assertion failure indicates that the data count exceeds the buffer maximum size. This points to an issue with how data is being handled during I/O operations, possibly due to incorrect buffer management or miscounting.
Looking at the categories provided: 'device' seems appropriate since it's related to hardware emulation (specifically SD card handling). Other categories like 'network', 'graphic', or 'socket' don't fit here. It's not a translation issue ('mistranslation'), nor does it relate directly to performance, permissions, or user-mode assembly in this context.
Therefore, the bug is most likely related to device emulation within QEMU.
</think>
device
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