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authorChristian Krinitsin <mail@krinitsin.com>2025-07-06 16:43:19 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-06 16:43:19 +0000
commit238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd (patch)
treecd8a1b75ba7b3543eb7fe6857f408e7be4d9fd0b /results/classifier/deepseek-r1:32b/reasoning/runtime/2353
parent96049c939b1916d80532630d63c14e04d5244f1d (diff)
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+<think>
+Okay, so I'm trying to figure out how to classify this bug report about QEMU's user-mode emulation. The problem is that when running certain programs, like gcc on Alpine Linux AArch64, there's a segfault because the ELF interpreter is being mapped at address 0 in the guest space. This causes issues with musl libc which interprets a NULL base address incorrectly.
+
+Looking at the description, it seems the issue arises during the loading of the ELF image where the load_addr is set to 0 for the interpreter. Then, when this is passed to target_mmap(), QEMU translates this guest address into a host address. Since guest_base isn't zero, it's trying to map the interpreter at actual address 0 on the host, which violates Linux's policy of not mapping anything there.
+
+The user provided a patch that modifies the mmap functions in QEMU's linux-user/mmap.c. They changed how want_p is calculated by checking if start is non-zero before translating it. So, when start is zero (NULL), they pass 0 to mmap instead of translating it via g2h_untagged.
+
+Now, thinking about the categories: instruction, syscall, runtime. This issue doesn't seem to be directly related to an incorrect instruction being executed or a problem with a specific system call itself. Instead, it's more about how memory is being managed and mapped during runtime, leading to unexpected behavior when the program runs.
+
+So, I think this falls under "runtime" because it's an error that occurs while the program is executing, specifically due to incorrect address mapping.
+</think>
+
+runtime
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