From 256709d2eb3fd80d768a99964be5caa61effa2a0 Mon Sep 17 00:00:00 2001 From: Christian Krinitsin Date: Tue, 3 Jun 2025 12:04:13 +0000 Subject: add new classifier result --- .../classifier/003/semantic/gitlab_semantic_bzhi | 46 ++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 results/classifier/003/semantic/gitlab_semantic_bzhi (limited to 'results/classifier/003/semantic/gitlab_semantic_bzhi') diff --git a/results/classifier/003/semantic/gitlab_semantic_bzhi b/results/classifier/003/semantic/gitlab_semantic_bzhi new file mode 100644 index 000000000..8cbf1d760 --- /dev/null +++ b/results/classifier/003/semantic/gitlab_semantic_bzhi @@ -0,0 +1,46 @@ +semantic: 0.920 +instruction: 0.623 +boot: 0.220 +network: 0.203 +mistranslation: 0.171 +other: 0.064 +KVM: 0.064 + +x86 BZHI semantic bug +Description of problem +The result of instruction BZHI is different from the CPU. The value of destination register and SF of EFLAGS are different. + +Steps to reproduce + +Compile this code + + +void main() { + asm("mov rax, 0xb1aa9da2fe33fe3"); + asm("mov rbx, 0x80000000ffffffff"); + asm("mov rcx, 0xf3fce8829b99a5c6"); + asm("bzhi rax, rbx, rcx"); +} + + + +Execute and compare the result with the CPU. + +CPU + +RAX = 0x0x80000000ffffffff +SF = 1 + + +QEMU + +RAX = 0xffffffff +SF = 0 + + + + + + +Additional information +This bug is discovered by research conducted by KAIST SoftSec. -- cgit 1.4.1