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Diffstat (limited to 'results/classifier/deepseek-r1:32b/reasoning/syscall/2168')
| -rw-r--r-- | results/classifier/deepseek-r1:32b/reasoning/syscall/2168 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/results/classifier/deepseek-r1:32b/reasoning/syscall/2168 b/results/classifier/deepseek-r1:32b/reasoning/syscall/2168 new file mode 100644 index 00000000..b4ad9217 --- /dev/null +++ b/results/classifier/deepseek-r1:32b/reasoning/syscall/2168 @@ -0,0 +1,19 @@ +<think> +Okay, so I'm looking at this bug report where running `grep` inside a Gentoo chroot using qemu-x86_64 on an arm64 host causes a segmentation fault. The user provided some output and a GDB backtrace to help figure out what's going on. + +First, I need to understand the problem. They unpacked an x86_64 chroot environment and then tried running `grep` using qemu as an emulator. When they do this with QEMU versions 8.x.x, it segfaults, but not with 7.x.x. So something changed between these versions that's causing the issue. + +Looking at the output from running the command, it says there's a SIGSEGV with code MAPERR and address 0x20. That suggests a memory access error, specifically trying to map a region that's invalid or not accessible. + +The GDB backtrace shows the crash happening in `open_self_maps_2` within syscall.c at line 8089. The function is part of handling syscalls related to opening files, especially `/proc/self/maps`, which is used for mapping memory regions. It looks like it's trying to access some guest memory that isn't properly mapped or has an incorrect address. + +The backtrace goes through several functions: `walk_memory_regions` in user-exec.c and then into `open_self_maps_1` again in syscall.c, leading up to `do_guest_openat`. So the issue seems tied to how QEMU is handling file operations within the emulated environment, particularly when dealing with memory maps. + +Since the problem occurs during a system call (`sys_openat`), it's likely related to how QEMU translates or handles syscalls from the guest OS on the host. The fact that it works in 7.x.x but not 8.x.x suggests there might have been changes in the syscall handling between these versions. + +Considering the categories provided—instruction, syscall, runtime—the issue is happening during a system call execution within QEMU. Therefore, this bug falls under the "syscall" category because it's an error that occurs when processing a system call from the guest OS. +</think> + +The bug involves a segmentation fault occurring during a system call within the QEMU emulator, specifically related to file operations and memory mapping. + +syscall \ No newline at end of file |