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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/manual-review/1643619
parent96049c939b1916d80532630d63c14e04d5244f1d (diff)
downloademulator-bug-study-238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd.tar.gz
emulator-bug-study-238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd.zip
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+<think>
+Alright, I'm trying to figure out how to classify this bug report as either an instruction, syscall, or runtime issue within QEMU. 
+
+The problem described is that netlink is broken on big-endian MIPS when using qemu-user. The user ran 'ip route' in a Debian chroot and it hung. They provided strace output showing that the process was waiting for a netlink response which never came.
+
+Looking at the strace, I see that the sendto call includes a buffer with len=671088640, which is 0x28000000 in hex. This looks like it's been byteswapped because on big-endian systems, byte order matters differently than on little-endian. The user mentioned that by removing the call to fd_trans_unregister in do_syscall for NR_socket, the issue was fixed.
+
+The bug seems related to how file descriptors are being translated or handled when making syscalls. Specifically, after creating a socket (which is a syscall), the code immediately unregisters the translation of the file descriptor. This could cause issues if other parts of the system expect that translation to still be in place for subsequent operations like sendto.
+
+So this isn't an instruction-level bug because it's not about specific CPU instructions or assembly code. It's also not a runtime issue in the sense of general execution problems. Instead, it's about how syscalls (in this case, socket) are being handled and their related file descriptor translations. The problem arises from the way the system calls interact with the file descriptors, specifically when dealing with endianness.
+
+Therefore, the category should be 'syscall' because it relates to errors in handling system calls within QEMU.
+</think>
+
+The bug is classified under 'syscall' as it involves an error related to system call handling, particularly with file descriptor translations and netlink communication on big-endian MIPS.
+
+syscalls
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