diff options
Diffstat (limited to 'results/classifier/qwen3:32b/reasoning/syscall/1756')
| -rw-r--r-- | results/classifier/qwen3:32b/reasoning/syscall/1756 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/results/classifier/qwen3:32b/reasoning/syscall/1756 b/results/classifier/qwen3:32b/reasoning/syscall/1756 new file mode 100644 index 000000000..361dabc03 --- /dev/null +++ b/results/classifier/qwen3:32b/reasoning/syscall/1756 @@ -0,0 +1,11 @@ +<think> +Okay, let's see. The user is reporting a SIGSEGV issue in qemu-user on Linux. The problem seems to be related to the brk(NULL) system call. The description says that when brk(NULL) returns a value that doesn't point to an existing page, qemu-user's do_brk() function tries to memset a region starting from that non-existent page, causing a segmentation fault. + +Hmm, the core of the problem is how qemu handles the brk system call. The issue arises because qemu assumes that the brk value returned by the system call is valid and contiguous with the .bss section. But Linux's brk(NULL) can return a random value for security reasons, which might not be backed by a page. When qemu tries to zero out the memory between the target_brk and brk_page, it's accessing a page that doesn't exist, leading to a crash. + +The user suggests that qemu should only call memset if the first page of the range exists. The problem here is in the system call handling for brk, specifically in how qemu interprets and acts upon the return value of brk(NULL). Since this is related to the handling of the brk system call, which is a syscall, the category should be 'syscall'. + +The error isn't due to an incorrect instruction (so not 'instruction'), nor is it a general runtime error like a memory leak or logic error elsewhere. It's specifically about the handling of a system call's return value and the subsequent actions taken by qemu, which falls under syscall issues. +</think> + +syscall \ No newline at end of file |