diff options
Diffstat (limited to 'classification_output/04/semantic/gitlab_semantic_bzhi')
| -rw-r--r-- | classification_output/04/semantic/gitlab_semantic_bzhi | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/classification_output/04/semantic/gitlab_semantic_bzhi b/classification_output/04/semantic/gitlab_semantic_bzhi new file mode 100644 index 00000000..476461d9 --- /dev/null +++ b/classification_output/04/semantic/gitlab_semantic_bzhi @@ -0,0 +1,51 @@ +semantic: 0.920 +graphic: 0.652 +instruction: 0.623 +device: 0.589 +assembly: 0.406 +vnc: 0.287 +boot: 0.220 +network: 0.203 +socket: 0.198 +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. |