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<think>
Alright, let's try to classify this bug report for QEMU.
First, the user is experiencing an IO error when trying to create a live snapshot using virsh with libvirt. The error message mentions that the QEMU command 'transaction' failed due to an I/O error, specifically "Operation not permitted (EPERM)".
Looking at the provided code snippet from QEMU's `handle_aiocb_rw_linear` function, it seems that during an asynchronous I/O operation using `pwrite`, the system call is failing with EPERM. The error suggests that the process doesn't have the necessary privileges to perform this operation.
The bug report indicates that the problem occurs when creating a snapshot, which involves writing data to a disk image. The function stack shows that it's part of the external snapshot preparation process, involving block I/O operations through libaio (as seen in `paio_submit` and related functions).
Considering the categories provided: mistranslation, assembly, device, graphic, socket, network, KVM, boot, vnc, debug, files, permissions, performance, kernel, peripherals, hypervisor, other.
The error is related to file I/O permissions. The process lacks appropriate privileges when performing the `pwrite` system call. This falls under file permissions issues because it's about the ability of the process to access or modify files, which is governed by Unix permissions and capabilities.
Therefore, the category that best fits this bug report is "permissions".
</think>
permissions
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