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Diffstat (limited to 'results/classifier/deepseek-2/reasoning/mistranslation/1824344')
| -rw-r--r-- | results/classifier/deepseek-2/reasoning/mistranslation/1824344 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/results/classifier/deepseek-2/reasoning/mistranslation/1824344 b/results/classifier/deepseek-2/reasoning/mistranslation/1824344 new file mode 100644 index 000000000..9bdcfeae6 --- /dev/null +++ b/results/classifier/deepseek-2/reasoning/mistranslation/1824344 @@ -0,0 +1,21 @@ +<think> +Okay, so I need to classify this bug report into one of the given categories. Let me read through the problem carefully. + +The user is reporting an issue with QEMU when executing certain x86 instructions like retf or iret in userspace. The problem occurs under a protected mode OS like Linux, specifically when the stack pointer is invalid. The error code pushed during these instructions has incorrect bits set—specifically bit 2 isn't being set, which indicates whether the fault was from kernel space or user space. + +The guest OS uses this flag to determine if it's a kernel or user page fault. If it thinks it's a kernel issue, it might cause a panic because it assumes the error is irrecoverable, leading to the process being killed. + +Looking at how to reproduce: compiling a small test program that uses retf and running it causes the process to be killed by the kernel, even though the system has SMAP support. The dmesg output shows a kernel bug about a null pointer dereference but recovers by killing the process. + +Now, considering the categories: mistranslation refers to incorrect mappings from source to target, which happens in user mode. This seems relevant because the issue occurs when executing x86 instructions in userspace under QEMU. The problem is with how error codes are set during exceptions, which relates to assembly lowering or perhaps the translation layer. + +Other possible categories include device, graphic, socket, network, KVM, etc., but this isn't a device or display issue. It's more about how QEMU handles certain instructions and their associated errors in the context of user-mode execution. + +The error occurs during instruction execution, which suggests it's related to how QEMU translates these x86 instructions into the target (like host) code. Since retf and iret are control flow instructions that involve stack manipulation and exception handling, the problem is likely in the assembly lowering step or how exceptions are handled in the translation process. + +So, considering all this, the most appropriate category seems to be 'mistranslation' because it's about incorrect semantic mapping when translating x86 instructions into the target architecture (QEMU's IR or host code), leading to wrong error codes being set during these operations. +</think> + +The issue is related to how QEMU translates specific x86 instructions, particularly retf and iret, which involve setting error codes incorrectly. This affects user-mode execution by causing incorrect flags in exceptions, leading to OS panics. + +**mistranslation** \ No newline at end of file |