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Diffstat (limited to 'results/classifier/no-thinking-deepseek-r1:70b/reasoning/syscall/2553')
| -rw-r--r-- | results/classifier/no-thinking-deepseek-r1:70b/reasoning/syscall/2553 | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/results/classifier/no-thinking-deepseek-r1:70b/reasoning/syscall/2553 b/results/classifier/no-thinking-deepseek-r1:70b/reasoning/syscall/2553 new file mode 100644 index 000000000..037b118cd --- /dev/null +++ b/results/classifier/no-thinking-deepseek-r1:70b/reasoning/syscall/2553 @@ -0,0 +1,12 @@ +The issue arises from an incorrect structure definition in QEMU's user-mode emulation for PowerPC64, leading to a failed system call when joining IP multicast groups. Specifically, the `imr_ifindex` field in the emulated `struct target_ip_mreqn` is defined as a 64-bit `abi_long`, while it should be a 32-bit integer. This mismatch causes invalid data marshalling during the `setsockopt` call, resulting in an ENODEV error. + +**Steps to reproduce:** + +1. **Compile and run natively on x86_64:** The program works as expected. +2. **Cross-compile for PowerPC64 and emulate with QEMU:** The `setsockopt` call fails with "No such device" due to the incorrect structure marshalling. + +**Analysis:** +The problem lies in how QEMU handles the size and alignment of the `ip_mreqn` structure during emulation. The incorrect definition of `imr_ifindex` as a 64-bit value leads to invalid data being passed to the host's system call, causing the failure. Additionally, QEMU's bounds checking for the option length is too permissive, allowing incorrectly sized structures to be processed without proper validation. + +**Conclusion:** +This is a **syscall** bug because it involves incorrect handling of system calls within QEMU's user-mode emulation layer, specifically related to marshalling data structures used in socket operations. \ No newline at end of file |