From 2773b5e236e2217a35a53dbc298757610c7bbbc6 Mon Sep 17 00:00:00 2001 From: Christian Krinitsin Date: Wed, 4 Jun 2025 21:20:13 +0000 Subject: add new iteration --- .../classifier/008/semantic/gitlab_semantic_bzhi | 53 ++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 results/classifier/008/semantic/gitlab_semantic_bzhi (limited to 'results/classifier/008/semantic/gitlab_semantic_bzhi') diff --git a/results/classifier/008/semantic/gitlab_semantic_bzhi b/results/classifier/008/semantic/gitlab_semantic_bzhi new file mode 100644 index 000000000..253ab4184 --- /dev/null +++ b/results/classifier/008/semantic/gitlab_semantic_bzhi @@ -0,0 +1,53 @@ +semantic: 0.920 +graphic: 0.652 +device: 0.589 +vnc: 0.287 +debug: 0.256 +boot: 0.220 +network: 0.203 +socket: 0.198 +performance: 0.165 +PID: 0.130 +permissions: 0.069 +other: 0.064 +KVM: 0.064 +files: 0.051 + +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