Alright, I need to classify this bug report into one of three categories: instruction, syscall, or runtime. Let me go through each point step by step. The user is running x86_64 binaries on an aarch64 system using QEMU's user-mode emulation. They've set up binfmt_misc to use the static qemu-x86_64 interpreter. When they run their Docker container and execute the firmware upgrade tool, they encounter "Synchronous External Abort" errors in dmesg. Looking at the error message, it mentions a synchronous external abort at a specific memory address. This suggests that the CPU encountered an exception during execution. Synchronous aborts typically occur when there's an issue with the instruction being executed or the data access. In this context, since they're using QEMU to emulate x86_64 on aarch64, the problem might be in how the emulator handles certain instructions or memory accesses. The error happens during runtime when executing the tool inside Docker. Possible causes could include a misconfiguration in binfmt_misc, incorrect QEMU setup, or an issue with the binary being executed. It's also possible that there's a bug in the QEMU user-mode emulation for x86_64 on aarch64. Considering the categories: - Instruction: If it was a specific faulty instruction causing the problem. - Syscall: If the error were related to system calls between the host and guest. - Runtime: Since this is an error that occurs during execution, likely due to how QEMU handles certain operations at runtime. Given that the issue arises when running the tool inside Docker using the emulated environment, it's more about runtime behavior rather than a specific instruction or syscall issue. The emulator might be failing to handle a particular operation correctly during runtime, leading to the abort. runtime